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Sample+Midterm+4 - Version 1 Biology 1510 Fall 2009 Midterm...

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Version 1 Biology 1510 Fall 2009 Midterm 4 General Instructions: Read these instructions. Completely fill in your name and ID number on the left side of the Scantron 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. Be sure to write and bubble in your version number in column P of “Special Codes”! We will not honor any requests to have the exam regraded using the other key, if you write the wrong version number or leave this field blank. 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 11 pages. A copy of the genetic codon table is on page 11. This examination contains 50 multiple choice questions, each worth 2 points. Turn in both the question sheets and the answer sheet. Good luck! Your name here:_________________________________________________ page 1 of 11
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Version 1 1. Fruit flies have 3 pairs of autosomes and 1 pair of sex chromosomes. Crossing over during meiosis occurs only in females, but not in males. How many genetically different chromosomal combinations will be present in the sperm cells? A. 4 B. 8 C. 16 D. 32 E. potentially many millions 2. Proteins used to package DNA into nucleosomes in eukaryotic cells ___ A. have lots of positively charged amino acids like lysines and arginines B. have lots of negatively charged amino acids like glutamic acid and aspartic acid C. straighten DNA molecules when they bind to DNA. D. hydrolyze ATP in order to bind DNA. E. bind DNA only at specific sequences 3. Prophase chromosomes consists of two sister chromatids joined at the centromere . Each sister chromatid contains: A. A single strand of DNA, complementary to the other sister chromatid B. A DNA duplex (double-stranded DNA molecule) identical to the sister chromatid C. A DNA duplex from one parent; its sister chromatid has the homologous DNA duplex from the other parent D. A DNA duplex consisting of a strand of DNA from one parent and a strand from the other parent. E. Two identical DNA duplexes from one parent; its sister chromatid has two identical DNA duplexes from the other parent
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