Mutations in promoter regions of a gene are most likely to _____
a. prevent mRNA from being synthesized
b. trap mRNA inside the nucleus
c. prevent mRNA from being recognized by the ribosome
d. prevent mRNA from being post-transcriptionally modified
e. alter the amino acid sequence
ANSWER: a
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Which is false concerning mitosis and meiosis?
A. At the end of meiosis 1, there are 2 cells with half the genetic material as the parent cell. B. The end product of meiosis is 4 daughter cells. C. The end product of meiosis is 2 identical daughter cells. D. The end product of mitosis is 2 identical daughter cells.
Amino acids are ampholytes because they can function as either a(n):
A) acid or a base. B) neutral molecule or an ion. C) polar or a nonpolar molecule. D) standard or a nonstandard monomer in proteins. E) transparent or a light-absorbing compound
In female mammals, germ cells
A. arrested in meiosis II until puberty. B. develop into fully mature gametes before birth. C. are arrested in meiosis I until puberty. D. are not produced until puberty. E. arrested in mitosis until puberty.
When bonding two monosaccharides to form a disaccharide, which process is used?
A. Dehydration reaction B. Peptide bond formation C. Breakage of a glycosidic linkage D. Hydrolysis reaction