Ribosome movement along the mRNA is called
A. activation.
B. replication.
C. transcription.
D. initiation.
E. translocation.
Answer: E
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Referring to Figure 5-21, which of the following modifications requires ATP?
A. methylation B. ubiquitination C. myristoylation D. acetylation E. adenylylation
Which of the following is not true of combinatorial control of the yeast mating-type?
A. Mcm1 and ?1 combine to activate ?-specific genes in haploid ? cells. B. Mcm1 and a1 combine to repress ?-specific genes in haploid a cells. C. Mcm1 and ?2 combine to repress a-specific genes in haploid ? cells. D. Mcm1 and ?2 combine to repress a-specific genes in diploid cells.
Phenylacetic acid is added to the penicillin fermentation to allow incorporation of which side chain group?
A. Methyl B. Acetyl C. Benzyl D. Propyl
In 1944, Avery, MacLeod, and McCartney performed transformation experiments using live, harmless bacteria and extracts from virulent bacteria treated with various enzymes. Which of the following were used and why?
A) Proteases and RNases to rule out protein and RNA as the transforming factors. B) Lipase to rule out lipoproteins as the transforming factor. C) Kinase to show that transformation is phosphorylation dependent. D) ATPase to show that transformation is not dependent on ATP.