Campbell Biology with MasteringBiology Canvas Direct Integration for BSC 2011 University of South Florida, 1/e
1st Edition
ISBN: 9781323442982
Author: Reece
Publisher: Pearson Education
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Chapter 12, Problem 7TYU
Cell A has half as much DNA as cells B, C, and D in a mitotically active tissue. Cell A is most likely in
(A) G1.
(B) G2.
(C) prophase.
(D) metaphase.
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In the cells of some organisms, mitosis occurs withoutcytokinesis. This will result in(A) cells with more than one nucleus.(B) cells that are unusually small.(C) cells lacking nuclei.(D) cell cycles lacking an S phase.
Which of the following events does not take place during mitosis?(a) The centromeres of the chromosomes split. (b) The nucleoli disappear, and the two centrosomes separate from one another. (c) The nuclear envelope breaks. (d) Four daughter cells are generated. (e) The chromosomes cluster at the cell’s equator.
Final preparations for cell division are made during this stage of the cell life cycle: (a) G1, (b) G2, (c) M, (d) S.
Chapter 12 Solutions
Campbell Biology with MasteringBiology Canvas Direct Integration for BSC 2011 University of South Florida, 1/e
Ch. 12.1 - How many chromosomes are drawn in each part of...Ch. 12.1 - WHAT IF? A chicken has 78 chromosomes in its...Ch. 12.2 - How many chromosomes are shown in the illustration...Ch. 12.2 - Compare cytokinesis in animal cells and plant...Ch. 12.2 - During which stages of the cell cycle does a...Ch. 12.2 - Compare the roles of tubulin and actin during...Ch. 12.2 - A kinetochore has been compared to a coupling...Ch. 12.2 - MAKE CONNECTIONS What other functions do actin...Ch. 12.3 - In Figure 12.14, why do the nuclei resulting from...Ch. 12.3 - How does MPF allow a cell to pass the G2 phase...
Ch. 12.3 - MAKE CONNECTIONS Explain how receptor tyrosine...Ch. 12 - Differentiate between these terms: chromosome,...Ch. 12 - In which of the three phases of interphase and the...Ch. 12 - Explain the significance of the G1, G2, and M...Ch. 12 - Through a microscope, you can see a cell plate...Ch. 12 - Vinblastine is a standard chemotherapeutic drug...Ch. 12 - One difference between cancer cells and normal...Ch. 12 - The decline of MPF activity at the end of mitosis...Ch. 12 - In the cells of some organisms, mitosis occurs...Ch. 12 - Which of the following does not occur during...Ch. 12 - Cell A has half as much DNA as cells B, C, and D...Ch. 12 - The drug cytochalasin B blocks the function of...Ch. 12 - VISUAL SKILLS The light micrograph shows dividing...Ch. 12 - DRAW IT Draw one eukaryotic chromosome as it would...Ch. 12 - EVOLUTION CONNECTION The result of mitosis is that...Ch. 12 - SCIENTIFIC INQUIRY Although both ends of a...Ch. 12 - WRITE ABOUT A THEME: INFORMATION The continuity of...Ch. 12 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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- Cell differentiation always involves(A) transcription of the myoD gene.(B) the movement of cells.(C) the production of tissue-specific proteins.(D) the selective loss of certain genes from the genome.arrow_forwardWhich of the following does not occur during interphase? (a) (b) (c) (d) DNA is replicated. Spindle fibres form. New organelles are formed. The cell size increases.arrow_forwardThe term cellular differentiation refers to (a) the loss of genes from cells. (b) the acquisition of new functional capabilities by cells. (c) the production of functionally specialized cells. (d) the division of genes among different types of cells.arrow_forward
- Which of the following does not occur during mitosis? (a) (b) (c) (d) Chromatin condenses and forms chromosomes. Chromosomes move to the equator of the cell. Spindle fibres pull homologous chromosomes to opposite poles of the cell. Two new nuclei are formed that have two full sets of genetic information.arrow_forwardWhich stage of mitosis in an animal cell does each part of Figure Q6 represent? (A) (B) (C) (D) Figure Q6arrow_forwardDescribe the phases of interphase. a.) G1 B.) S C.) G2arrow_forward
- Mitosis differs from meiosis in the following ways EXCEPT:(a) Mitosis results in a full complement of chromosomesin two cells, whereas meiosis results in four cells havinghalf the number of chromosomes.(b) In mitosis, all chromosomes are replicated, whereas inmeiosis, only half are replicated.(c) Mitosis only occurs in somatic or body cells, whereasmeiosis occurs in production of gametes or sex cells.(d) None of the above.(e) a and c onlyarrow_forwardThe nuclear substance composed of histone proteins and DNA is (a) chromatin, (b) the nuclear envelope, (c) nucleoplasm, (d) nuclear pores.arrow_forward(a) the cell cycle is divided into different phases (referred to as M, G0, G1, S and G2); Can you account for what happens during the different parts of the cycle and out of it is checked? ( b) What is the difference between apoptosis and necrosis? ( c) What are caspases and what is their function in the cell?arrow_forward
- Name the stage of cell cycle at which one of the following events occur:(i) Chromosomes are moved to spindle equator.(ii) Centromere splits and chromatids separate.(iii) Pairing between homologous chromosomes takes place.(iv) Crossing over between homologous chromosomes takes place.arrow_forwardThe term differentiation refers to (a) the loss of genes from cells. (b) the acquisition of new functional capabilities by cells. (c) the production of functionally specialized cells. (d) the division of genes among different types of cells.arrow_forwardWhich of the following best describes the difference between interphase and mitosis? a) During interphase, DNA has a loose structure that condenses during mitosis. b) During interphase, histones help compact DNA into chromosomes. And once mitosis starts, histones are destroyed. c) During interphase, DNA is tightly packed into chromosomes that uncoil once mitosis starts. d) During interphase, DNA is packed as chromosomes. And during mitosis, DNA is called chromatin. Please I need a surely answer and a quicker responsearrow_forward
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