exam - 1) All of the following statements are true except:...

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1) All of the following statements are true except: A) DNA synthesis happens during mitosis. B) All cells come from a preexisting cell. C) Mitosis and cytokinesis are required for asexual reproduction. D) Mitosis produces new nuclei with exactly the same chromosomal endowment as the parent nucleus. E) Mitosis may occur without cytokinesis. 2) The centromere is a region in which A) the nucleus is located prior to mitosis. B) chromosomes are grouped during telophase. C) chromatids are attached to one another. D) most genes are found. E) metaphase chromosomes become aligned. 3) A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei containing how many chromosomes? A) 92 B) 46 C) 16 D) 23 E) 12 4) If there are 20 centromeres in a cell, how many chromosomes are there? A) 80 B) 20 C) 10 D) 40 E) 30 5) A duplicated chromosome typically has how many molecules of DNA?
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A) 1 B) 2 C)4 D)8 E)thousands 6)New DNA is made during what part of the cell cycle? A) G1 phase B) S phase C) G2 phase D)M phase(either mitosis or meiosis) E)cytokinesis 7) If a cell has 8 chromosomes at metaphase of mitosis, how many chromosomes will it have during anaphase? A) 4 B) 1 C) 16 D) 8 E) 2 8) The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this? A) an animal cell in metaphase B) a plant cell undergoing cytokinesis C) an animal cell in telophase D) an animal cell undergoing cytokinesis E) a plant cell in metaphase 9) During which phase(s) of mitosis do we find chromosomes composed of two chromatids? A) from metaphase through telophase
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B) from G2 of interphase through metaphase C) from anaphase through telophase D) from G1 of interphase through metaphase E) from interphase through anaphase 10) What is a genome? A) a specific segment of DNA that is found within a prokaryotic chromosome B) a specific sequence of polypeptides within each cell C) the complete complement of an organism's genes D) an arrangement of our chromosomes from largest to smallest E) a specialized polymer of four different kinds of monomers 11) Which of the following is true of a species that has a chromosome number of 2n = 16? A) The species has 16 sets of chromosomes. B) During the S phase of the cell cycle there will be 32 separate chromosomes. C) There are 16 homologous pairs. D) The species is diploid with 32 chromosomes. E) A gamete from this species has 8 chromosomes. 12) The X and the Y chromosomes are called sex chromosomes because A) they are present only when cells undergo meiosis. B) genes located on these chromosomes play a role in determining the sex of the individual. C) females have X chromosomes and males have Y chromosomes.
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This note was uploaded on 11/07/2009 for the course BIO 066.6 taught by Professor Darby during the Spring '09 term at Sierra.

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exam - 1) All of the following statements are true except:...

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