Which of the following events is least likely a result of protein phosphorylation?
A. reduction in the activity of an enzyme
B. transport of the protein to the nucleus
C. the specific binding of a regulatory protein
D. targeting of the protein for degradation
D
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Which of the following is nota mechanism for regulating gene expression after the mature RNA transcript is produced?
A. gene silencing by miRNAs B. inhibition of translation initiation C. blockage of the promoter by a repressor protein D. protein degradation
Some insects
a. lack wings. b. mature without undergoing metamorphosis. c. are highly social. d. have mouth parts specialized for bloodsucking. e. fit all of these descriptions.
Motility of bacteria can be observed as spreading growth over the agar surface. Which of the following bacterial structure(s) is/are used for motility?
A. Pilus(i) B. Flagellum(a) C. Capsule D. Lipopolysaccharide E. Cytoplasmic membrane
Place the following steps in the PCR procedure in the correct order: 1) Incubate at 94°C to denature DNA strands; 2) Incubate at 72°C for DNA synthesis; 3) Incubate at 60°C for primer hybridization.
a. 1 3 2 b. 3 2 1 c. 2 1 3 d. 3 1 2 e. 1 2 3