f08 bio 202 mt3 version 1

f08 bio 202 mt3 version 1 - Exam...

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Unformatted text preview: 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 symptom s ranging from breathing difficultie s to recurrent infections . Which of the following terms best describes this? 1) _____ Incomplete dominance B) Epistasis Multiple alleles D) Pleiotropy Which of the following help to hold the DNA strands apart while they are being replicated ? 2) _____ primase exonuclease single- strand binding proteins ligase DNA polymerase Which of the following help(s) to stabilize mRNA by inhibiting its degradati on? 3) _____ 5' cap and poly (A) tail introns RNA polymerase spliceosomes TATA box How many unique gametes could be produced through independ ent assortme nt by an individua l with the genotype AaBbCC DdEE ? 4) _____ 4 B) 64 C) 32 D) 8 E) 16 Of the following , which is the most current descriptio n of a gene? 5) _____ a DNA subunit that codes for a single complete protein a unit of heredity that causes formation of a phenotypic characteristic a DNA—RNA sequence combination that results in an enzymatic product a DNA sequence that is expressed to form a functional product: either RNA or polypeptide a discrete unit of hereditary information that consists of a sequence of amino acids The DNA sequece and structure of telomeres has been found to be highly conserve d througho ut the evolution of eukaryote s. What does this most probably reflect? 6) _____ that mutations in telomeres are relatively advantageous the inactivity of this DNA that telomeres serve a critical function and must be maintained the low frequency of mutations occurring in this DNA that new evolution of telomeres continues In a nucleoso me, the DNA is wrapped around 7) _____ ribosomes. satellite DNA. a thymine dimer. histones. polymerase molecules. In animals, meiosis results in gametes, and fertilizati on results in 8) _____ spores. gametophytes. zygotes. karyotypes clones. If mammali an cells receive a go- ahead signal at the G 1 checkpoi nt, they will 9) _____ show a drop in MPF concentration. complete cytokinesis to form daughter cells proceed to DNA replication move directly into telophase. exit the cycle and switch to a nondividing state. When translatin g secretory or membran e proteins, ribosome s are directed to the ER membran e by 10) _____...
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This note was uploaded on 07/10/2010 for the course BIO 204 taught by Professor O'neal during the Spring '07 term at SUNY Stony Brook.

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f08 bio 202 mt3 version 1 - Exam...

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