BIOL 121 (2012) Spring Exam 3 + Key

C some trnas can base pair with more than one codon

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Unformatted text preview: of the following is a mechanism for increasing expression of a eukaryotic gene (4 pts): A. B. C. D. 7) Removal of the poly A tail. Removal of acetyl groups from lysine residues on histones. Attachment of acetyl groups to lysine residues on histones. MicroRNA binding to the mRNA transcribed from the gene. Gene flow describes the exchange of genetic material between (4 pts): A. B. C. D. E. males and females. chromosomes. species. populations. individuals. 3 BIOL 121 Exam 3 4/23/12 8) NAME: Which of the following is NOT true (4 pts): A. The ribosome binding site is complementary to a sequence of RNA on the ribosome. B. There are 20 amino acids but only one aminoacyl tRNA synthetase. C. Some tRNAs can base pair with more than one codon sequence. D. The ribosome is a ribozyme. 9) The cladistic approach to phylogenetics primarily uses ______________ to group taxa into groups that are evolut...
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