The protein kinase activity of the receptor protein-tyrosine kinase is located ____
a. on the extracellular surface of the membrane
b. on the cytoplasmic side of the cell membrane
c. within the hydrophobic portion of the lipid bilayer
d. in the nuclear membrane
e. in the cystol
B
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The letter “A” in the above figure represents
a. the root nodules. b. the primary root. c. the primary leaf. d. the cotyledons. e. none of these.
SARS symptoms include ____
a. high fever, headaches, and respiratory problems b. brittle bones and rash c. heart arrhythmia, kidney failure, and calcium depletion d. liver cirrhosis and difficulty swallowing e. eye pain, loss of vision, and headaches
The process by which allele frequencies are altered in a small population due to chance is called
A) genetic drift. B) random mutation. C) fitness. D) random evolution. E) assortative evolution.
Which of the following proteins are likely to act as gene activators?
(a) factors X and Y (b) factors X and Z (c) factors Y and Z (d) factor X only