True or False: DNA can be repaired WITHOUT the use of a template
a. TRUE
b. FALSE
Answer: A
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When tryptophan levels in a cell are low, a cell will stall transcription but continue translation of the tryptophan operon.
Answer the following statement true (T) or false (F)
Which of the following is not true of translesion synthesis (TLS)?
A. TLS uses polymerases with wider-than-normal active site architecture to accommodate abnormal nucleotides in the template. B. TLS lacks the 3'-5' exonuclease activity usually required for proofreading. C. It is activated during replication when the polymerase stalls at a lesion; the TLS polymerase takes over long enough to extend the DNA over the lesion. D. TLS can be used to repair lesions such as pyrimidine dimers, bulky adducts, and double-stranded breaks. E. All of these choices are true.
If a plant cell is placed in a hypotonic solution, the
a. entire cell will not swell or shrink. b. entire cell will shrink. c. turgor pressure will increase. d. cell wall prevents the cell from exploding. e. turgor pressure will increase, but the cell wall prevents the cell from exploding.
About how many net molecules of ATP are produced at the end of the three stages of aerobic respiration?
A. 38 B. 36 C. 32 D. 16 E. 4