The hormone gastrin is released by the stomach. Its function is to stimulate the release of gastric juices. What is the stimulus to release this hormone?
A) the aroma of food
B) the process of chewing food
C) the sight of food
D) the distension of the stomach and presence of protein
Answer: D
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A tRNA's anticodon is 5'GGC3'. What amino acid is attached to it?
A. Glycine B. Proline C. Alanine D. Arginine
According to the endosymbiont hypothesis, ____
a. most of the genes from the endocytosed bacteria moved to the nucleus
b. the host anaerobe became dependent upon the endocytosed bacteria c. the endocytosized bacteria became dependent on the host cell d. all endocytosed bacteria were photosynthetic e. most of the genes from the endocytosed bacteria moved to the nucleus, the host anaerobe became dependent upon the endocytosed bacteria, and the endocytosed bacteria became dependent on the host cell
Which among the following is the least
effective means of contraception?
a. abstinence b. rhythm method c. condom d. douching e. spermicides
Copies of chromosomes linked together at their centromeres at the beginning of meiosis are known as ____
a. mother chromosomes b. daughter chromosomes c. sister chromatids d. homologous chromatids e. analogous genes