An exonuclease is an enzyme that can
A. remove a terminal nucleotide in a polynucleotide chain.
B. connect two fragments of DNA together.
C. cut DNA at a site?specific sequence.
D. catalyze DNA synthesis.
E. produce an RNA primer for DNA synthesis.
Ans: A. remove a terminal nucleotide in a polynucleotide chain.
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a. listeriosis. b. diphtheria. c. pertussis. d. tetanus.
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A. the common cold. B. dental caries. C. hepatitis A. D. halitosis
Adult stem cells can only differentiate into the cell types that comprise the tissues in which they are located
a. True b. False
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