B1510S08_exam4_v1_key-1

B1510S08_exam4_v1_key-1 - Biology 1510 Spring 2008 Midterm...

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Biology 1510 Spring 2008 Midterm 4 Version 1 Name: General Instructions: • Read these instructions. • Completely fill in your name and ID number on the left side of the exam sheet. Start entering your ID number from the first column on the left – leave the last column blank. Your ID number is critical in entering your score into the class database. Write and bubble in your exam version number in column P Any errors in your name and/or ID entries will result in 5 points being subtracted from your final score! This is not a joke! • Please look over the entire exam before starting to work on any part of it. Please make sure that your copy of the exam includes all 10 pages. • This examination contains 52 questions, each worth 2 points, with a maximum of 100 points. Note that you should complete about one question per minute to finish the exam in the allotted time (50 minutes). I suggest that you leave the harder or more time-consuming questions until last. • Please think through each answer carefully. Select the single best answer. None of these are intended to be trick questions, so try to answer only the question asked. • Turn in both the question sheets and the answer sheet. • Good luck! Page 1
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Biology 1510 Spring 2008 Midterm 4 Version 1 Name: 1. The centromere is a region in which A) The nucleus is located prior to mitosis. B) Metaphase chromosomes become aligned. C) Chromosomes are grouped during telophase. D) Chromatids are attached to one another. E) New spindle microtubules form. 2. If there are 20 chromatids in a cell, how many centromeres are there? A) 40 B) 80 C) 30 D) 20 E) 10 Use the following information to answer the questions below. The lettered circle in Figure 12.1 shows a diploid nucleus with four chromosomes. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is symbolized as black and the other haploid set is gray. The chromosomes in the unlettered circle have not yet replicated. Choose the correct chromosomal conditions for the following stages. Figure 12.1 3. At prometaphase of mitosis ___B__________ 4. One daughter nucleus at telophase of mitosis _____E________ Page 2
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Biology 1510 Spring 2008 Midterm 4 Version 1 Name: 5. All of the following occur during mitosis except the A) Condensing of chromosomes. B) Disappearance of the nucleolus. C) Synthesis of DNA. D) Uncoupling of chromatids at the centromere. E) Formation of a spindle. 6. 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) A plant cell undergoing cytokinesis B) An animal cell in telophase C) A plant cell in metaphase D) An animal cell in metaphase E) An animal cell undergoing cytokinesis 7. During which phases of mitosis are chromosomes composed of two chromatids? A) From anaphase through telophase
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B1510S08_exam4_v1_key-1 - Biology 1510 Spring 2008 Midterm...

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