A polysome is ____
a. one of the units of a ribosome
b. the nuclear organelle that synthesizes RNA
c. an organelle that functions similarly to a ribosome during meiosis
d. the two units of a ribosome considered together
e. an mRNA molecule with several ribosomes attached
ANSWER: e
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Which of the following is not true of mitotic cell division?
A. It occurs in eukaryotes, but not in prokaryotes. B. It is a highly regulated process. C. It is a form of asexual reproduction. D. It is a process that is very important in the life cycle of sexually reproducing organisms. E. It does not require DNA replication.
Which of the following is a eudicot?
a. palm b. corn c. oak d. orchid e. lily
All of the following are examples of ribozymes or ribozyme activity except
A) peptidyl transferase activity. B) autocatalytic RNAs. C) ribonuclease P. D) intron removal from pre-rRNA. E) zymogen.
The ability of retroviruses to induce tumors is related to which enzyme?
a) Reverse transcriptase b) RNA polymerase c) DNA polymerase d) Protease