Erythromcycin, a macrolide, inhibits protein synthesis
A. by preventing the formation of the initiation complex.
B. by binding to the tRNA preventing peptide bond formation between amino acids.
C. by interfering with both the initiation and elongation stages of translation.
D. by binding to the ribosome, preventing translocation due to interference with the attachment of mRNA.
Answer: D
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a. adenylyl cyclase b. diacylglycerol (DAG) c. phospholipase C d. inositol triphosphate e. phosphodiesterase
Protein sequences consist of how many amino acids?
a. 20 b. 10 c. 5 d. 3
Which of the following statements about PCR is true?
A. PCR uses DNA polymerase. B. PCR stands for "polymerizing copies of RNA." C. PCR can create several copies of a segment of DNA in a test tube. D. One new strand of DNA is created with each replication cycle.
Asgard archaea are currently a proposed superphylum rather than being universally accepted because ________.
A. they have genes that encode eukaryotic signature proteins such as actin and tubulin B. they possess intracellular trafficking proteins even though they lack endoplasmic reticula and Golgi apparati C. they are known only through DNA sequence fragments; they have not been cultivated in the laboratory D. they are found in chemically and geographically diverse sites