BIO 202 Fall 2008

BIO 202 Fall 2008 - Exam N am e_ M ULTIPLE CHOICE. Choose...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this? 1) _____ A) Incomplete dominance B) Epistasis C) Multiple alleles D) Pleiotropy 2) Which of the following help to hold the DNA strands apart while they are being replicated? 2) _____ A) primase B) exonuclease C) single-strand binding proteins D) ligase E) DNA polymerase 3) Which of the following help(s) to stabilize mRNA by inhibiting its degradation? 3) _____ A) 5' cap and poly (A) tail B) introns C) RNA polymerase D) spliceosomes E) TATA box 4) How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE ? 4) _____ A) 4 B) 64 C) 32 D) 8 E) 16 5) Of the following, which is the most current description of a gene? 5) _____ A) a DNA subunit that codes for a single complete protein B) a unit of heredity that causes formation of a phenotypic characteristic C) a DNA—RNA sequence combination that results in an enzymatic product D) a DNA sequence that is expressed to form a functional product: either RNA or polypeptide E) a discrete unit of hereditary information that consists of a sequence of amino acids 6) The DNA sequece and structure of telomeres has been found to be highly conserved throughout the evolution of eukaryotes. What does this most probably reflect? 6) _____ A) that mutations in telomeres are relatively advantageous B) the inactivity of this DNA C) that telomeres serve a critical function and must be maintained D) the low frequency of mutations occurring in this DNA E) that new evolution of telomeres continues 7) In a nucleosome, the DNA is wrapped around 7) _____ A) ribosomes. B) satellite DNA. C) a thymine dimer. D) histones. E) polymerase molecules. 8) In animals, meiosis results in gametes, and fertilization results in 8) _____ A) spores. B) gametophytes. C) zygotes. D) karyotypes E) clones.
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9) If mammalian cells receive a go-ahead signal at the G 1 checkpoint, they will 9) _____ A) show a drop in MPF concentration. B) complete cytokinesis to form daughter cells C) proceed to DNA replication D) move directly into telophase. E) exit the cycle and switch to a nondividing state. 10) When translating secretory or membrane proteins, ribosomes are directed to the ER membrane by 10) _____ A) a chemical signal given off by the ER. B) a specific characteristic of the ribosome itself, which distinguishes free ribosomes from bound ribosomes. C) a signal-recognition particle that brings ribosomes to a receptor protein in the ER membrane.
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This note was uploaded on 10/28/2011 for the course BIO 202 taught by Professor Dean during the Spring '08 term at SUNY Stony Brook.

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BIO 202 Fall 2008 - Exam N am e_ M ULTIPLE CHOICE. Choose...

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