Variation is usually introduced by the process of _________?
a. random fertilization
b. mutation
c. random mating
d. recombination between homologous chromosomes during meiosis
e. all of the above
Answer is e. all of the above
Rationale: Variation occurs when one gene in the organism is mutated. (This can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
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A) flavoproteins B) copper-nickel compounds C) cytochromes D) iron-sulfur proteins E) coenzyme Q
Crossing over usually contributes to genetic variation by exchanging chromosomal segments between
A) sister chromatids of a chromosome. B) chromatids of nonhomologues. C) nonsister chromatids of homologues. D) nonhomologous loci of the genome. E) autosomes and sex chromosome
What type of bond is formed when two atoms share electrons?
A.) electronic bond B.) covalent C.) electrostatic D.) hydrogen E.) ionic
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A. Pyruvate is reduced and CoA is oxidized. B. Pyruvate is oxidized and CoA is reduced. C. Pyruvate is reduced and NAD+ is oxidized. D. Pyruvate is oxidized and NAD+ is reduced.