The retinoblastoma protein (Rb) binds to and inhibits
a. transcription factor E2F.
b. oncogenes.
c. cyclin-dependent kinase.
d. p53.
Ans: a. transcription factor E2F.
Biology & Microbiology
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Acidic foods generally need a higher canning temperature than do nonacidic foods
Indicate whether the statement is true or false.
Biology & Microbiology
Mosses are gametophyte plants. What can you predict about them from this statement?
A. Mosses are diploid. B. Mosses grow from seeds (zygotes). C. Mosses are haploid. D. Answers a and c are both correct.
Biology & Microbiology
The effect of acetylcholine on heart muscle cells is to
a. stimulate one contraction. b. increase the rate of beating. c. decrease the rate of beating. d. relax the heart.
Biology & Microbiology
The infective stage of the Cryptosporidium parvum is:
A. The Trophozoite B. The Cyst C. The Oocyst D. The Sporozoite E. The trypomastigote.
Biology & Microbiology