The origin of all genetic variation is:
A. mutation.
B. natural selection.
C. genetic drift.
D. non-random mating.
Answer: A. mutation.
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Lactose is composed of _____________ joined by a _____________ linkage
A. glucose and galactose; glycosidic B. two glucoses; peptide C. glucose and fructose; glycosidic D. two amino acids; peptide E. two galactoses; glycosidic
Which of the following is INCORRECT for ethanol fermentation?
A. A source of organic sugar is required, for instance from malt. B. Results in a net production of NADH. C. Glucose is oxidized to pyruvate as one of the steps. D. Carbon dioxide and ATP are produced. E. NADH is used to reduce acetaldehyde to ethanol.
Retinoic acid ____
a. causes germ cells in male embryos to enter meiosis b. causes germ cells in female embryos to enter meiosis c. prevents germ cells in male embryos from entering meiosis d. prevents germ cells in female embryos from entering meiosis e. affects entry into mitosis but not meiosis
________-driven promoters are comprised of an Inr sequence and a TATA box with or without an associated BRE.
Fill in the blank(s) with the appropriate word(s).