High stomach acidity ____
a. creates ideal conditions for carbohydrate digestion
b. promotes emulsification of fats
c. favors fat digestion
d. blocks the release of histamine, thereby favoring production of peptic ulcers
e. converts pepsinogens into their active forms
e
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In DNA replication there are leading and lagging strands, because
A) DNA replication is conservative and a completely new DNA molecule must be made. B) DNA replication is semiconservative and each strand is copied simultaneously in opposite directions. C) the strands of DNA are parallel and are copied in the same direction simultaneously. D) one strand of DNA is copied faster than the other.
In a population of Mendel's garden peas, the frequency of the A allele (p) is 30% and the frequency of the a allele (q) is 70%. Of 100 plants, 28 are AA, 4 are Aa, and 68 are aa. Is the population in Hardy-Weinberg equilibrium? How can you tell?
What will be an ideal response?
Which type of receptor is used by an owl to visually detect the movement of prey?
a. mechanoreceptors b. photoreceptors c. chemoreceptors d. thermoreceptors e. nociceptors
Which statement accurately describes the relationship between RNA interference, small interfering
RNA, and micro RNAs?
a. They all describe different methods of post-translational gene regulation. b. Micro RNAs can be broken down into two types: RNA interference molecules and small interfering RNAs. c. RNA interference occurs in two ways: by micro RNA or by small interfering RNAs. d. Small interfering RNAs bind to dicer protein, microRNAs do not; both are types of RNA interference. e. MicroRNAs are transcribed from viruses, small interfering RNAs are transcribed from nuclear DNA; both are types of RNA interference.