10-151_Exam2A - Bio 151 Spring 2010 Exam 2 3 points for...

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Bio 151 Spring 2010 Exam 2 3 points for each answer, 75 points total Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Ohno's proposal about the role of gene duplication was: A) Duplication is the cause of most recessive mutations B) Duplication often results in triploid species C) Duplication often results in the evolution of new genes D) Duplication causes sel f sh "junk" DNA to accumulate 2) In Limnaea snails, what phenotypes would you expect from a cross between a Dd dextrally coiled and a Dd sinestrally coiled snail? A) All dextral B) All sinestral C) 1/2 dextral, 1/2 sinestral D) 3/4 dextral, 1/4 sinesral 3) An RNA molecule had the sequence 5' - GCAAUGCAA - 3'. What is the sequence of the DNA strand that was transcribed (i.e. the coding strand)? A) 5' - AACGTAACG - 3' B) 5' - GGTTACGTT - 3' C) 5' - GCAATGCAA - 3' D) 5' - GCTTAGCTT - 3' 4) The basic structure of a nucleotide includes the following components: A) tryptophan and leucine. B) mRNA, rRNA, and tRNA. C) phosphorus and sulfur. D) amino acids. E) base, sugar, and phosphate. 5) In an analysis of the nucleotide composition of double - stranded DNA to see which bases are equivalent in concentration, which of the following would be true? A) A
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10-151_Exam2A - Bio 151 Spring 2010 Exam 2 3 points for...

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