What is the function of an exonuclease?
a. to remove nucleotides one at a time from the end of a single-stranded nucleic acid
b. to remove base pairs one at a time from the end of a double-stranded nucleic acid
c. to break individual phosphodiester linkages within single-stranded nucleic acids, generating discrete fragments
d. to break individual phosphodiester linkages within double-stranded nucleic acids, generating discrete fragments
e. to synthesize nucleic acids
Ans: a
You might also like to view...
Interoctopus communication is facilitated by
A. a radula. B. mantle connections. C. chromatophores. D. chemical pheromones.
Organic molecules consist mostly of _____ atoms
a. carbon c. carbon and hydrogen b. carbon and oxygen d. carbon and nitrogen
Why are action potentials usually conducted in one direction?
A) The nodes of Ranvier conduct potentials in one direction. B) The brief refractory period prevents reopening of voltage-gated Na+ channels. C) The axon hillock has a higher membrane potential than the terminals of the axon. D) Voltage-gated channels for both Na+ and K+ open in only one direction.
The bacterium E. coli swims in a straight line, called a ________, for a few seconds; then it stops, tumbles, then swims away in a new direction.
Fill in the blank(s) with the appropriate word(s).