Estrogen receptor (ER) ? typically ____, while ER? typically ____
a. stimulates DNA binding; inhibits DNA binding
b. stimulates cell proliferation; inhibits cell proliferation
c. stimulates channel opening; inhibits channel opening
d. inhibits DNA binding; stimulates DNA binding
e. inhibits cell proliferation; stimulates cell proliferation
ANSWER: b
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Vibrio cholerae primarily infects the
A) stomach. B) small intestine. C) large intestine. D) rectum.
Which of the following characteristics of DNA-dependent DNA synthesis is not the same for
DNA-dependent RNA synthesis? A. Synthesis requires a template. B. Initiation involves the recognition of a specific DNA sequence. C. Initiation of synthesis requires a primer. D. Synthesis is catalyzed in the 5' to 3' direction. E. All of the choices given are the same for both DNA and RNA synthesis.
Three-quarters of the substantial amount of energy consumed by the brain is used to run a single molecular machine that maintains the resting potential of neurons. What is this machine called?
A. K+ leak channel B. sodium-potassium pump C. acetylcholine receptor D. voltage-gated sodium channel E. voltage-gated calcium channel
Sperm are formed directly from the maturation of ____
a. sperm mother cells b. spermatids c. spermatogonia d. primary spermatocytes e. secondary spermatocytes