Four of the five choices listed below are related by a
common region of the plant body. Select the
exception.
a. leaf
b. root cap
c. node
d. axillary bud
e. stem
Answer: b
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When DNA is transferred into a prokaryotic cell it may
A) be degraded by enzymes. B) replicate independent of the host chromosome. C) recombine with the host chromosome. D) be degraded by enzymes, replicate independent of the host chromosome, or recombine with the host chromosome.
The normal pH of rainfall is
A. slightly acidic, pH 5.6. B. slightly basic, pH 5.6. C. slightly acidic, pH 9.6. D. slightly basic, pH 9.6. E. neutral, pH 7.0.
Which is the best reason for adenine base-pairing with thymine in DNA?
A. The two molecules covalently bond together. B. Both are large bases and, therefore, bond tightly. C. Both are small bases and, therefore, bond tightly. D. These two bases fit together like jigsaw puzzle pieces.
Class I MHC proteins
a. are found on the surface of B lymphocytes. b. have open groove ends. c. have closed groove ends. d. have open and closed groove ends.