casino max:casino,max,锘縶,Keywords,#Title,:锘縶Keywords}#Title Segmentation# P.1: Chapter 3, Section 3, Nuclei - System Control Center Exercises with Answers Details 1. (2013路Shandong Taian High School Test) The following statements about the unity of nuclear structure and functi

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P.1: Chapter 3, Section 3, Nuclei - System Control Center Exercises with Answers Details 1. (2013路Shandong Taian High School Test) The following statements about the unity of nuclear structure and function are correct ()A. DNA in the nucleolus controls cellular metabolism. The DNA on chromatin stores a large amount of genetic information. The number of nuclear pores in different cells is the same. The nuclear membrane of prokaryotic cells also has two layers of membranes, which facilitate the control of the ingress and egress of substances: B.

Nuclear pores are channels of certain macromolecular substances. There are many nuclear pores in metabolically active cells; prokaryotic cells have no true nucleus, ie, no nuclear membrane; there is no DNA in nucleoli, and DNA is mainly present on chromatin. And store a lot of genetic information.

2. The description of chromosomes and chromatin is wrong () A. Chromatin is a substance in the nucleus that is easily stained dark by basic dyes. The chromatin structure and chemical composition of chromatin and chromosome are identical. The main components of chromosome or chromatin are DNA and protein D. Chromosomes or chromatin are present in the nucleus of eukaryotic cells: B is selected.

Chromatin is easily stained dark by basic dyes, which are mainly composed of DNA and proteins; chromosomes and chromatin are different forms of the same substance at different times; chromosomes or chromatin are only found in eukaryotes It is not found in the nucleus of cells but in the cytoplasm and prokaryotic cells of eukaryotic cells.

3. (2013路Some of the key high school high school tests in Dongying City, Shandong Province) The chemical composition analysis of the following organisms or structures, the most similar is () A. HIV and chromosome B. Phage and chromosome C. Ribosomes and chromosomes D. Phage analysis: Select B.

Phage and chromosomes are mainly composed of DNA and proteins.

4. (2013路Shanxi Province Shanda High School High Test) Protein is the embodiment of life activities. A large number of facts show that in the cells with strong protein synthesis, there are often more and larger nucleoli, and the number of ribosomes is also large. According to this fact, we can infer () A. The protein in the cell is mainly synthesized in the nucleolus. Nucleol may be involved in the synthesis of essential substances that make up the ribosome. Cells without nucleoli often fail to synthesize protein D. Nucleolus and ribosomes are the control centers for cell life activities: B.

The nucleolus is involved in the synthesis of rRNA, which is one of the constituents of ribosomes.

5. The premise that the cells can normally complete various life activities is () A. Membrane selective permeability B. Mitochondrial energy supply C. There is genetic material in the nuclear D. Cell integrity analysis: Select D.

The nucleus of the egg cell exists alone, and the cytoplasm of the brain cell also exists alone. The two die after a while, and the cytoplasm of the egg cell and the nucleus of the brain cell nucleus still divide and differentiate normally, so the cell can be seen. To complete normal life activities, the integrity of the cellular structure must be maintained.

6. As shown in the figure, the nuclear structure pattern is shown in the figure. (1) The barrier to the nuclear material in the figure is []________, which is composed of ________ layer membrane, and the cytoplasmic synthesis group Proteins such as proteins enter the nucleus through []________.

(2) The important structure for performing genetic function in the nucleus is []________, and genetic information exists in ________ of its components.

(3) Structure [2] The function of ________ is ________________________________________________________________________.

(4) Briefly indicate the difference in the structure between the nuclei of prokaryotic cells and the nuclei in the figure.

____________________________________________________________________________________________________________________________________________.

Answer: (1) 3 nuclear membranes and 2 nucleus pores (2) 1 chromatin DNA (3) nucleoli are involved in the synthesis of certain RNA and ribosome formation (4) prokaryotic cells in the pseudonucleus Nuclear membrane, nuclear pore, nucleolus, chromatin and other structures, the DNA is bare 1. The nuclear membrane is a bilayer membrane, and the nuclear pores are channels through which macromolecular substances enter and exit.

2. Chromatin and chromosomes are two states of existence of the same substance at different times.

3. Nucleolus is involved in the synthesis of certain RNAs and the synthesis of ribosomes.

4. The nucleus is a genetic information base and is the control center for cell metabolism and inheritance.

1. The following organisms or cells with a nuclear structure are () A. HIVB. Mature red blood cells in human blood C. E. coli D. Analysis of mesophyll cells of soybean: D is selected.

HIV is a virus, consisting only of nucleic acids and proteins, and has no cell structure; E. coli has a pseudonucleus, no shaped nuclei; human mature red blood cells have no cell nuclei; only soybean mesophyll cells have nuclei.

2. The following statement about the nucleus is correct () A. There are a large number of enzymes on the nuclear membrane of eukaryotic cells, which is beneficial to the smooth progress of various chemical reactions. Observing prokaryotic cells under electron microscope, we can see that the main structure of the nucleus is nuclear membrane, nucleolus and chromosome C. The nuclear membrane of eukaryotic cells has nuclear pores, and macromolecules such as deoxyribonucleic acid can enter the cytoplasm D through the nuclear pores. The quasi-nucleus of prokaryotic cells has no difference in analysis from the nucleus of eukaryotic cells except for the nuclear membrane: A is selected.

The nuclear membrane belongs to the biofilm, which has a large number of enzymes, which facilitates the smooth progress of various chemical reactions. The prokaryotic cells only have no nuclear membrane, nucleolus and chromosome, but have DNA; nuclear pores are macromolecules. The matter enters and exits the pores of the nucleus, but the DNA molecules in the nucleus cannot enter the cytoplasm through the nucleus, but are stored and replicated only in the nucleus; the pseudonucleus of the prokaryotic cells has no nuclear membrane, nucleoli and chromosomes, and only naked DNA molecules.

3. The membrane structure that has both a double membrane structure and allows macromolecules such as proteins to pass through is () A. Mitochondrial membrane B. Endoplasmic reticulum membrane C. Nuclear membrane D. Cell membrane analysis: Select C.

The endoplasmic reticulum membrane and cell membrane are monolayer membrane structures; both mitochondria and nuclear membranes have a bilayer membrane, but only the nuclear membrane can allow large molecules such as proteins to pass.

4. When observing yeast and lactic acid bacteria with a high power microscope, the main structure that can be used to identify the difference between the two is () A. Cell wall B. Cell membrane C. Cytoplasmic D. Nuclear membrane analysis: choose D.

The yeast is a eukaryote, and the lactic acid bacteria are prokaryotes, the fundamental difference being the presence or absence of a nuclear membrane.

5. Among the following cells, the nucleoli is smaller () A. Nerve cell B. Pancreatic cells C. Tumor cell D. Embryonic cell analysis: choose A.

The nucleolus is involved in the formation of rRNA, and the more abundant the protein, the larger the nucleolus.

6. The number of nuclear pores per unit area of 鈥嬧€媏ukaryotic cells is related to cell type and metabolic level.

The least number of nuclear pores in the following cells is () A. Islet cells B. Hematopoietic stem cells C. Plasma cells (can produce antibodies) D. Oral epithelial cell analysis: select D.

Either organism or cell is structurally characterized by its function.

The nuclear pore is a pore exchange between the nucleus and the cytoplasm. The number of nuclear pores is related to the metabolic level of the cell. If the metabolic level is high, the number of nuclear pores is high.

In contrast, cells that do not divide and have no secretory function have fewer nuclear pores, which is the result of the structure and function of the cells.

7. The picture below shows the 铦捐瀳 铦捐瀳 fertilized egg 缂?experiment.

You think the picture best describes () A. Cytoplasm controls the metabolism of cells. The nucleus controls the metabolism of the cell. Cytoplasm is the control center of cytogenesis D. The nucleus is the control center for cell metabolism and inheritance: D is selected.

It is known from the information in the figure that during the process of fertilization of the fertilized egg, only the cells containing the nucleus can divide and develop into embryos, indicating that the nucleus is the control center of cell metabolism and inheritance.

8. The nucleus is taken out from the somatic cells of the ewes, and injected into the ovary B to remove the nucleus of the nucleus. The fused cells are cleavage to form early embryos, and then implanted into the uterus of another ewe, and the small babies are born. Most traits of sheep () A. Hard to predict B. Like a C. Like B.D. Like C resolution: choose B.

The inheritance of organisms includes both nuclear and cytoplasmic inheritance, in which nuclear inheritance plays a major role.

The nucleus of the fused cell is taken from the ewes, and the traits of the sheep that are divided and differentiated are mostly like a nail.

The cytoplasm of the fused cells comes from the ewes B. Therefore, there are a few traits like the sheep.

Elder C is only a function of 鈥渂orrowing abdomen鈥? its trait has no genetic relationship with the trait of the lamb mentioned in the question, but its nutritional status has an effect on certain traits of the lamb. This effect is not hereditary.

9. Some people have used the eukaryotic single-celled organisms a and b to do the following experiments. The most illustrative problem in this experiment is () A. The genetic information that controls the occurrence of c traits comes from the nucleus B. The genetic information that controls the occurrence of c traits comes from cytoplasmic C. The occurrence of c traits is determined by the genetic information of the nucleus and cytoplasm. The genetic information in the nucleus controls the occurrence of all traits in the organism: A is selected.

The nucleus of a binds to the cytoplasm of b, and c traits are obtained, indicating that the nucleus controls the occurrence of c traits, but it cannot be said that the nucleus controls the occurrence of all traits.

10. (2013路Kunming No. 8 Middle School High Test) The messenger RNA is synthesized in the nucleus. During the process of binding from the nucleus to the ribosome, the unit membrane that passes through is () A. 0 layer B. 1 layer C. 2 layers D. 3-layer analysis: Select A.

RNA is a macromolecular substance. After synthesis in the nucleus, it cannot enter the cytoplasm through the nuclear membrane, but enters the cytoplasm through the nucleus to bind to the ribosome, thereby controlling protein synthesis. Therefore, the RNA does not pass through the unit membrane structure when it exits the nucleus. .

11. Scientists used microscopic technology to remove the nucleus of the amoeba, and found that its metabolism was weakened and the movement stopped. When re-implanted into the nucleus, it was found that its life activity could be restored, which shows that () A. The nucleus is the control center of cell life activity. The nucleus is the place where the genetic material is stored and replicated. The nucleus is the control center of cellular genetic properties. The nucleus is the main site for cell metabolism: choose A.

The problem involves the metabolism of cells, that is, the life activities of cells. Therefore, the above description shows that the nucleus is the center of cell life control, not the center of cell metabolism.

12. The following statement about the model, the error is () A. The submicroscopic structure model of the cell is the physical model B. The model should reflect the relationship between the nature and regularity of things. The production of the physical model first considers whether it is beautiful. Mathematical models can be represented by formulas, graphs, etc.: Select C.

When making a model, science, knowledge, and accuracy should be the first, followed by beauty or not, practical or not.

13. The figure shows the structure of a typical cell nucleus and its surrounding parts.

Please answer according to the picture: (fill in the [], fill in the corresponding name on ________) (1) Only in the ________ cells, the structure represented by this figure can be seen using the ______________ microscope.

(2)[3]________ is mainly composed of protein and ________, the former enters the nucleus through []________.

(3) The picture shows [1]________ and []__________ connectivity, []________ is the passage of macromolecular substances into and out of the nucleus, thus strengthening the connection between ________ and ________ in the living system. .

Parsing: 1 is the endoplasmic reticulum, 2 is the nuclear pore, 3 is the chromatin, 4 is the nucleolus, and 5 is the nuclear membrane.

The nuclear pore is the channel through which macromolecular substances enter and exit the nucleus. The main components of chromatin are DNA and protein.

The endoplasmic reticulum is connected to the nuclear membrane in the figure, which makes the nucleus and cytoplasm closely linked.

: (1) eukaryotic electrons (2) chromatin DNA 2 nuclear pores (3) endoplasmic reticulum 5 nuclear membrane 2 nuclear pore cytoplasmic nucleus 14. The following is a submicroscopic structural pattern of two types of cells.

Please answer according to the picture: (1) The cells of the A map belong to the ________ cells, and the reason for the judgment is ________________________________________________________________________________________.

(2) The structural names of the cells in both A and B are ribosomes, ________ and ________, and the structure with selective permeability is ________________________________________________________________________.

(3) In the figure B, the structure that supports and protects cells is mainly composed of ____________________.

The organelles associated with the synthesis, processing, and secretion of secreted proteins in cells are (please fill in the numbers in the figure) ______________________________.

Analysis: (1) It can be seen that the 'cell' has no formed nuclei and can be judged to be a prokaryotic cell.

(2) B is a eukaryotic cell. Prokaryotic cells and eukaryotic cells share some common cellular structures. For example, the common organelle is a ribosome, which has cell walls and cell membranes. The cell membrane is biologically active and selective. membrane.

(3) The cell wall of plant cells is mainly composed of cellulose and pectin, which supports and protects cells.

The synthesis of secreted proteins is related to ribosomes, endoplasmic reticulum, Golgi, and mitochondria. The numbers in the corresponding figures are 11, 10, 12, and 8, respectively.

Answer: (1) pronuclear non-nuclear membrane (no shaped nuclei) (2) cell wall cell membrane membrane (3) cellulose and pectin 8, 10, 11, 1215. To study the role of the nucleus, a biologist studied 100 cells, and he divided each cell into (1)________________________________________________________________________.

(2) The nuclear part still has a certain cell death within 30 days due to: 1________________________________________________________________________; 2________________________________________________________________________.

(3) After one day of training, can it be shown that the viability of the non-nuclear part on the first day is stronger than that of the nuclear part? Why is this happening? ________________________________________________________________________________________________________________________________________________

(4) Since the role of the nucleus is so important, then you can provide a complete two for the human red blood cells without the nucleus: the nucleus - the control center of the system exercises the teacher with the 'nucleus - system control center' exercises 1 one, multiple choice questions (4 points for each question, a total of 60 points) 1. The structure in the nucleus that is easily stained by alkaline substances is () A. Nuclear membrane B. Nucleolus C. Nuclear fluid D. Chromatin 2. The main component of the chromosome is () A. DNA and sugar B. DNA and protein C. RNA and sugar D. RNA and protein 3. The distribution of Chlamydomonas DNA in the cells was determined by experiments as follows: 84% on the chromosome, 14% on the chloroplast, 1% on the mitochondria, and 1% in the cytoplasm.

These data indicate that the genetic material of A. cerevisiae is mainly DNAB. The main carrier of Chlamydomonas DNA is chromosome C. Chlamydomonas cytoplasm without DNAD. Chlamydomonas chromosome consists of DNA, protein and a small amount of RNA. In the following narrative about the nucleus, the error is () A. Is the main site of cell metabolism B. Is the control center of cytogenetic properties and metabolic activities. It is a place for the storage and replication of genetic material. It has a bilayer membrane structure. 5. The important structure of the nucleus to perform hereditary function is () A. nuclear membrane B. nucleolus C. chromatin D. nuclear pore 6. Among the following membranes, the ability to pass certain macromolecular substances is () A. Cell membrane B. Mitochondrial membrane C. Chloroplast membrane D. Nuclear membrane 7. Among the following groups of organisms, one group with no nuclear membrane in the cells is () A. Paramecium B. Amoeba and yeast C. Candida and Escherichia coli D. bovine and Chinese cabbage 8. The scientists transplanted the nucleus of the mammary gland of the female black mouse into the egg cell of the rat to be nucleated. After being developed into an early embryo, it was transplanted into the uterus of the brown rat. The body color and sex of the mouse produced by the brown rat were () A. Black female B. Brown female C. Bai Xiong D. Black male 9. The following life activities are not directly related to biofilm function () A. Islet B cells secrete insulin B. Amino acid dehydration condensation C. Neurotransmitters transfer information between neurons D. Complete fertilization effect 10. The following figure shows a way of information exchange between cells. The following related statements are incorrect (). A. The figure reflects the function of cell membrane with intercellular information exchange. B. In the figure, B cells represent target cells C. In the figure, a represents a signal molecule (such as a hormone) D. In the figure, b represents a carrier on the cell membrane. 11. Human injection of BCG After a while, antibodies against Mycobacterium tuberculosis appear in the blood.

The production of antibodies reflects which function of the cell membrane () A. Controls the entry and exit of cells B. Separates the cells from the external environment C. Excretion function D. Exchanges information between cells 12. According to reports, the United Kingdom Scientists extracted the nucleus from human skin cells and implanted them into bovine egg cells that eliminated the nucleus, thus cultivating human and animal mixed embryos.

From a genetic point of view, % of the genetic material in this mixed embryo comes from people, and only % comes from cattle.

You think that this % of genetic material is most likely to be present in bovine egg cells. () A. Nucleus B. Mitochondria C. Chloroplast D. Ribosomes 13. Figure is a structural pattern of the nucleus, the following for each structure and function The correct description is that () A.1 belongs to the biofilm system, separating the nuclear material from the cytoplasm. B.2 is the carrier of all biological genetic material. C.3 is related to protein synthesis and ribosome formation. D.4 is beneficial to DNA. And the mRNA enters the cytoplasm from the nucleus and realizes the exchange of substances between the nucleus. 14. The fact that human mature red blood cells and sperm have a short life span reflects the influence of (A) environmental factors B. The effect of function on life C Effects of genetic factors D. Nuclear and qualitative interdependence 15. With regard to the definition of organelles, there are currently two opinions. One is that organelles are relatively independent structures in the cell that are separated from the cytoplasm by membranes.

According to this definition, the following structures that cannot be called organelles are: () A. nucleus B. ribosomes C. endoplasmic reticulum D. Golgi 2, draw the textbook, page 53, Figure 3-10, nuclear structure pattern And label the name and function according to the text on the textbook.

(20 points) III. Non-choice questions (2 points for each mining point, total 20 points) The following figure shows the structure of some parts of eukaryotic cells. Please answer the following questions according to the analysis.

<1> (1) The nucleus is composed of a part such as [3], [4] [5] nuclear membrane.

(2) The passage of macromolecular substances into and out of the nucleus in cells is [2] (3) The nuclear membrane is composed of a layer membrane, which is connected to the endoplasmic reticulum membrane [1], and (4) is filled with 'pronuclear' or 'true' In the 'nuclear' cells, the structure shown in this figure is used.

'Nuclear-System Control Center' Exercise 2, Multiple Choice Questions (5 points for each question, a total of 60 points) 1. Scientists explore the function of the nucleus through the following experiments (as shown below): 1 The fertilized eggs of the scorpion are nucleated and non-nuclear, with only a few cytoplasms connected in the middle, resulting in half of the nucleus (a) stopping the division, half of the nucleus (b) can continue to divide; 2b part of the division When 16 to 32 cells are used, a nucleus is squeezed into a part that cannot be divided, and as a result, part a begins to divide and differentiate, and then develops into an embryo.

The following statements are incorrect () A. The results of this experiment can explain the division of cells and cell division and differentiation. B. In experiment 1, part b cells belong to the control group, and part a belongs to the experimental group C. Experiment 2 The operation of part a is contrasted with that of experiment 1. D. This experiment shows that the lifespan of cells is related to the nucleus. 2. The following figure shows four different organisms. The correct ones in the following related statements are () A. A and B. The main difference is that B has a cell wall B. The main difference between B and C is that C has a pseudo-nucleus C. The main difference between A and C is that A has a cellular structure. D. The main difference between B and D is that there is no nuclear membrane. In the following description of the membrane, the incorrect one is () A, consists of a sealed bilayer membrane B, there are many structurally specific nuclear pores C, the outer membrane surface is attached with ribosome D, the perinuclear cavity and the endoplasmic reticulum cavity The following information about the genetic information is incorrect () A, DNA is the carrier of genetic information B, the nucleus is the repository of genetic information C, the nuclear pore is the channel D of information exchange, the genetic information in the various cells of the human body is Different species of tremors are a type of cyanobacteria, and the following statements are wrong. Yes: () A. No chloroplast structure B. Has DNA and RNAC. Has mitochondrial structure D. Has cell wall structure 6. Scientists used microscopic techniques to remove the nucleus of amoeba, and found that their metabolism was weakened, movement stopped; when re-implanted into the nucleus Later, I found that my life activities can be restored.

This shows that () A. The nucleus plays a decisive role in life activities. B. The nucleus is the storage and replication site of genetic material. C. The nucleus is the control center of cytogenetic characteristics. D. The cells that are manually enucleated generally cannot survive. Long time 7. The best indication of a cell's special function is the size of A. nuclei B. The type and number of organelles C. Characteristics of cell membranes D. Differentiation of cells 8. Among the following substances, which are not synthesized on ribosomes are () A. maltase B. ribonucleic acid C. insulin D. carrier protein 9. The following cells or organelles are placed in distilled water without breaking () A. erythrocyte B. chloroplast C. mitochondria D. onion epidermal cells 10. The following statements about biological structure and its function, incorrectly () A. organisms have DNA and chromosome B. nucleus and cytoplasm remain continuous Substance exchange C. The metabolic reaction in the cytoplasm is ultimately controlled by the nucleus. D. The chromatin properties of the chromatin and the chromosome are the same. 11. Among the following substances, it is necessary to enter the nucleus through the nuclear pore () A. Amino acid B. RNA polymerase C. Globulin D. Glucose 12. The following are not storage sites for genetic information () A. Nucleus B. Mitochondria C. Vacuolar D. Chloroplasts 13. A single-celled organism that does not have chloroplasts but has chlorophyll, which is most likely A. Eukaryotes B. Heterotrophic organisms C. Nucleus-free membrane organisms D. Mitochondria organisms 14. The following description of the nucleus is correct () A. The nuclear membrane is a bilayer membrane with many ribosomes attached to the outer surface of the outer membrane. In different cells, the size and number of nucleoli are certain. C. The liquid in the nucleus is called cytosol D. The nucleus is a channel through which high-molecular substances including DNA pass freely. Non-choice questions (each 2 points for a total of 40 points) 1. Except for a very small number of cells such as mature plant-developed sieve cells and mature red blood cells of mammals, eukaryotic cells have nuclei.

The nucleus is a repository of remains and is the control center for cell metabolism and inheritance.

2. In the nucleus, the nuclear membrane has a bilayer membrane to separate the nuclear material from the cytoplasm; the main component of chromatin is DNA and protein, and DNA is the carrier of genetic information.

3. There is DNA in the nucleus, and DNA and protein are tightly bound to form chromatin.

Chromatin and chromosomes are the two states of existence of the same substance at different stages of the cell.

4. The cell is both the basic unit of the organism and the organism 5. The genetic information is like a 'blueprint' of the life of the cell, which is located in the nucleus.

Under the control of the nucleus, cells undergo material synthesis, energy conversion, and information exchange to complete growth, development, aging, and apoptosis.

First, multiple-choice questions card three: compulsory cell nuclear-system control center basic knowledge point fill-in and practice questions cell nuclear-system control center basic knowledge review: 1. In addition to higher plant mature and mammal mature A few extracellular, eukaryotic cells have a nucleus.

The nucleus is the largest and most important organelle in the integrated cell.

A large number of facts show that the nucleus controls the cells.

2. In the nucleus, the nuclear membrane has a bilayer membrane to separate and separate; chromatin consists of and is composed of genetic information; nucleolus is involved in the synthesis and formation; nuclear pores can be achieved between nucleoplasms Frequent and.

3. There is DNA in the nucleus, and DNA and protein are tightly combined. And the same substance exists in two states of the cell at different times. 4. Stored on DNA. When the cell divides, the DNA carries it from the parental cell to the daughter cell, ensuring the consistency of the parental cell. 5. A more comprehensive description of nuclear function should be: the nucleus is the reservoir, the control center of the cell. A cell is both the basic unit of an organism and the basic unit of an organism. 6. There are many forms of models, including models, models, models, and so on. When designing and making a cell model, it is the first, followed by the aesthetics of the model. Exercise 1. The following narrative error about the nucleus is () A. has a bilayer membrane structure B. is the main site of genetic information storage C. is the main site of cell metabolism D. is the largest and most eukaryotic cell Important organelles 2. The main substance composition of chromatin includes () and proteins and proteins D. Nucleic acids and proteins 3. The narrative of chromatin and chromosomes is wrong () A. Chromatin is susceptible to basic dyes in the nucleus Dyeing dark substances B. Chromatin and chromosome morphological structure, chemical composition are identical C. Chromatin or chromosomes are mainly composed of DNA and protein D. Chromatin or chromosomes only exist in the nucleus of eukaryotic cells. The somatic cell nucleus of a black ram was transferred to the enucleated egg cells of the white sheep, and the egg was implanted into the uterus of another black sheep, and the small sheep that were born were cloned sheep. Then, the cloned sheep is () A. Black rams B. Black female sheep C. White female sheep D. White rams 5. From the structure of the cells, the phenomenon of 'planting melons, melons and beans' Mainly determined by () A. mitochondria B. chloroplast C. ribosomal D. nucleus 6. It is reported that British scientists extracted nucleus from human skin cells, implanted in bovine egg cells excluding fine () nuclei, thereby cultivating The beast mixes the embryo. From a genetic point of view, % of the genetic material in this mixed embryo comes from humans, and only % comes from cattle. You think that this % of genetic material is most likely to be present in bovine egg cells. () A. Nucleus B. Mitochondria C. Chloroplast D. Ribosomal 7. As shown in the figure, the following three experiments were performed with animal fertilized eggs, and the following statements about the experiment The incorrect one is (double choice). () A. The core of the fertilized egg is degraded and disappeared after being cultured alone, indicating that the nucleus leaves the cytoplasm and cannot survive. B. The cells that have been removed from the nucleus are cultured and disappeared soon, indicating that the cytoplasm leaves the nucleus and cannot survive. C. This experiment shows that as long as the nucleus remains Integrity, cells can perform life activities normally. D. Nuclei and cytoplasm are the control centers of cells. 8. The following cells that do not rise in metabolically active cells are () A. mitochondria number B. nuclear DNA number C. free Water ratio D. Number of ribosomes 9. The figure below is a schematic diagram of the membrane structure of plant cells, which parts belong to them (in order of 1234) () A. Cell membrane, Golgi membrane, mitochondrial membrane, nuclear membrane B. Cell membrane, chloroplast membrane, mitochondrial membrane, endoplasmic reticulum membrane C. Mitochondrial membrane, nuclear membrane, endoplasmic reticulum membrane, Golgi membrane D. Chloroplast membrane, cell membrane, mitochondrial membrane, nuclear membrane 10. Please answer the following questions according to the diagram on the right (the number of the structure shown in the figure is filled in []]: (1) This figure represents the submicroscopic structure pattern of the cell, The basis for making this judgment is that the cell has a structure such as [], [], []. (2) The energy required for cells to carry out life activities is mainly supplied by [], and the main function of the structure is to carry out, and the main energy substance consumed by the physiological function is. (3) The name of Structure 5 is that it mainly processes, classifies, and packages proteins from []. (4) Structures 6, 7, 8, and 9 are respectively composed of , , and , and they are composed together, and their main functions are. 11. Biologists have found that the infinite proliferation of cancer cells is controlled by a regulatory gene that stimulates the proliferation of all animal cells. To explore whether the regulatory gene is present in the cytoplasm or nucleus, the researchers have done the following experiments. Design (pictured): According to the above ideas, please continue to complete the following experimental design: A. Experimental protocol (Experimental suggestion: cancer cells can be continuously cultured, but the cell morphology changes significantly. How to observe cell morphology is not required for experimental design) (1) Cervical cancer cells and mouse hepatocytes were separately treated with trypsin to disperse them into individual cells. (2) Separating individual cancer cells from single hepatocyte nucleus, respectively. (3) (4) Take two culture flasks, numbered A and B, respectively, and add equal amounts of culture solution. (5). (6) Observe the cell morphology in the A and B culture flasks, respectively. B. Expected experimental results and conclusions Reference answers: (3) Take cancer cell nucleus and hepatocyte cytoplasm to form recombinant cell A, take cancer cell and hepatocyte nucleus to form recombinant cell B (5) Take equal amount of recombinant cell A and recombinant cell B, respectively Add two culture flasks, A and B, for cell culture. From: Link address: http:///news/ Reprint, please keep, thank you! See more related content>>.


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