Which of the following is true of healthy G1 cells?
a) The p53 protein is found at very high levels.
b) The probability of apoptosis in these cells is very high.
c) The p53 protein is found at very low levels.
Ans: c) The p53 protein is found at very low levels.
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What molecule is synthesized as a copy of a gene from the DNA template strand?
A. ribozymes B. ribosomal RNA C. transfer RNA D. primer RNA E. messenger RNA
Which of these is in the right order?
a. biosphere, ecosystem, cell, tissue. b. community, molecule, atom, organ. c. biosphere, organelle, molecule, atom. d. ecosystem, community, biosphere, cell.
Which of the following describes an accurate order of events in translation?
A. Ribosomal translocation occurs before the first aminoacyl-tRNA molecule binds to the small subunit. B. Initiation of translation occurs only after the small subunit dissociates from the mRNA. C. The large subunit of the ribosome binds the mRNA before the small subunit. D. The first aminoacyl-tRNA molecule binds to the small subunit before the large subunit binds.
Regeneration, the regrowth of lost body parts, normally follows _____
A) all types of asexual reproduction B) fission C) fragmentation D) parthenogenesis