Bacteria use restriction enzymes to ____.
A. integrate viral DNA
B. destroy viral DNA
C. prevent mutation of their DNA
D. copy their genes
E. inhibit the expression of some of their genes
Answer: B
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In designing a new drug that may interfere with G-protein coupled receptor interacting protein functions, one possible target for drug action is not
A) altering ligand affinity for the receptor. B) promoting close association with other signal proteins. C) modifying epinephrine production. D) promoting receptor dimerization. E) controlling receptor localization in the membrane.
A couple are both heterozygous for the dominant allele for polydactyly. They want to have three children. What is the
probability that all three children will have polydactyly?
a. 3/4 b. 9/64 c. 1/64 d. 27/64 e. 1/2
The fact that the average human birthweight remains at about seven pounds is due to
a. modern prenatal care. b. the forces of stabilizing selection. c. conscious effort on the part of mothers. d. the limitations of food sources. e. selection tendencies moving in the direction of increasing birthweight.
Asexually produced fungal spores are ______, whereas fungal cells produced sexually, by the fusion of two mating strains, are _______
a. haploid; dikaryons b. haploid; diploid c. diploid; dikaryons d. diploid; haploid e. dikaryons; diploid