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36. From the perspective of cancer: genes that normally prevent the cell cycle from progressing are examples of are examples of a) proto-oncogenes, tumor suppressor genes b) umor suppressor genes; proto-oncogenes c) proto-oncogenes; oncogenes d) oncogenes; tumor suppressor genes , and genes that normally promote cell cycle progression (i.e., proliferation) 9 37. The activity of Cyclin-Cdk complexes depends on a) phosphorylation and dephosphorylation b) GTP binding. c) interactions directly with polymerase. d) direct interactions with DNA. 38. CRISPR sequences are recognized by a) quadruple-stranded DNA. b) ribosomal RNA c) guide RNA. d) their crisp fashion sense, which consists of lots and lots of flannel shirts. 39. Proteins active in specific phases of the cell cycle must be broken down when no longer required. This is achieved by the protein being labeled or tagged by , then digested by the protein complex called the a) phosphates; proteome b)ATP; G protein coupled receptor c) ubiquitin; receptor tyrosine kinase d) ubiquitin; proteasome