If a mutation were to occur in lambda phage that made it unable to express integrase, what would happen?
a. It would be stuck in the lysogenic cycle.
b. It would be unable to form circular DNA once it entered the host.
c. It would be unable to inject its DNA into the host.
d. It would be unable to recombine with the bacterial chromosome.
Answer: D
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(a) gametes: (b) gonads: (c) gametogenesis:
What is the effect of DNA methylation?
A. It increases transcription. B. It inhibits transcription. C. It increases crossover events. D. It decreases crossover events. E. It promotes post-translational modification of proteins.
What would be the result of an overall decrease in the quantity of hemoglobin in the blood?
a. decrease in oxygen transportation, no change in carbon dioxide transportation b. decrease in oxygen transportation, increase in carbon dioxide transportation c. decrease in both oxygen and carbon dioxide transportation d. increase in blood plasma dissolution of both oxygen and carbon dioxide
The five-toed limb of stem reptiles became
modified into a limb ____ in vertebrates that followed. a. suitable for high-speed running b. suitable for digging c. suitable for swimming d. with four fingers and an opposable thumb e. with all of these