A sprinter would have a high proportion of __________, and a marathon runner would have a high
proportion of __________.
a. red fibers; white fibers
b. fast-oxidative fibers; slow-oxidative fibers
c. red fibers; fast-oxidative fibers
d. red fibers; slow-oxidative fibers
e. slow-oxidative fibers; slow-oxidative fibers
B
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Genes are said to be linked when:
A. they lie on the same chromosome. B. they lie on the same chromosome and are greater than 50 map units apart. C. they lie on the same chromosome and are less than 50 map units apart. D. they are alleles of the same gene. E. None of these choices are correct.
During which stage of interphase is DNA replicated?
A) G2 B) G1 C) S
Mitochondria differ from chloroplasts in that mitochondria
A) convert light energy from the sun to chemical energy, whereas chloroplasts convert one form of chemical energy to another.
B) contain three different membrane-bound compartments, whereas chloroplasts contain two.
C) contain membrane folds called cristae, whereas chloroplasts contain disklike vesicles in stacks called grana.
D) are not found in plants, whereas chloroplasts are not found in animals.
Which issue has not been significant in the creation of genetically modified (GM) organisms?
A) some plants carrying genes from other species representing a possible threat to the environment B) inability of GM organisms to be modified to prevent them from reproducing once they pass beyond the experimental stage C) the fact that rogue microbes might transfer dangerous genes into other organisms D) the fact that the protein products of transplanted genes might lead to allergic reactions