Because there was no previous history of hemophilia in Queen Victoria's family, and because she transmitted the mutant allele to a number of her children, it is reasonable to assume that ____
a. her father was homozygous for the disorder
b. her mother was homozygous for the disorder
c. her sister was a heterozygous carrier
d. she was homozygous for the disorder
e. she was a heterozygous carrier
e
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How does the protein Sic1 regulate the cell cycle?
a. Sic1 is a cyclin that binds to a Cdk to form a cyclin/Cdk complex, which regulates the G1 to S transition. b. Sic1 inhibits an S phase cyclin/CDK complex required for synthesis to occur c. Sic1 binds to a cyclin, to form a complex that regulates the G2 to M transition. d. Sic1 is a growth factor that binds to external receptors and promotes the transition from G1 to S. e. Sic1 is a cyclin that binds to a Cdk to form a cyclin/Cdk complex to regulate the G2 to M transition.
The sipunculid worms are also called:
a. peanut worms. b. lugworms. c. innkeeper worms. d. fanworms. e. beardworms.
Four of the five choices listed below can be used to
describe fungal life. Select the exception. a. heterotrophic b. saprobic c. parasitic d. decomposer e. autotrophic
Blood calcium level is regulated in part by _________ a hormone secreted by the thyroid gland when the blood calcium level rises.
A) serotonin. B) parathyroid. C) calcitonin. D) estrogen.