In radishes, red and white are the pure-breeding
colors, and long and round are the pure-breeding
shapes, while the hybrids are purple and oval. The
cross of a red, long radish and a white, round radish
will produce an F2 generation in which
a. the most common phenotype will be oval and
purple.
b. the purple color will occur with all three shapes
of radish.
c. the red color will occur with all three shapes of
radish.
d. all white, long forms produced will be purebreeding.
e. all of these are true.
Answer: e
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A) was proposed by Hans Buchner. B) involves a conformational change in the shape of the enzyme. C) is also called the lock-and-key model. D) states that enzyme-substrate interactions are rigid. E) proposes that very strong covalent bonds are formed upon substrate binding.
Evolution at the genomic level involves changes in
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A) higher; higher B) lower; lower C) lower; higher D) higher; lower