Review Figure 19.15 below: The lactose operon is an example of negative regulation by a repressor whose function is modulated by an inducer
A. true
B. false
A
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Which of the following is the result of external mutagens?
A. template slippage during replication B. addition of bulky adducts to the DNA C. depurination D. recombination errors E. replication errors
During DNA sequencing, a laser beam scans the fragments on the electrophoresis gel to identify the ____________________
a. gene sequence by the color it fluoresces b. end nucleotide by the color it fluoresces c. useful DNA strands that will be analyzed further d. gene products that have been fixed by the gel e. gene products that have been sorted by the addition of a probe
Bacteria survive adverse conditions by forming
A. zygotes. B. capsules. C. glycocalyx. D. endospores
In the sliding filament model of muscle contraction, I bands contain
A) thick filaments. B) thin filaments. C) myosin II. D) myomesin. E) both thick and thin filaments.