Which of the following is NOT a form of active transport?
a. sodium-potassium pump
b. endocytosis
c. exocytosis
d. diffusion
e. ATP pump
D
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How can an amino acid sequence be used to design a gene-specific hybridization probe?
A) A portion of a polypeptide chain can be synthesized based on the amino acid sequence of the full protein. B) A protein can be purified, it can be digested with proteases that cleave it at specific sites, and one of the peptide fragments can be used as a probe. C) All possible nucleotide sequences that could encode a portion of the polypeptide can be synthesized and used as probes.
What is the common influence of ultraviolet light on DNA?
What will be an ideal response?
Which term would be applied to a regulatory condition that occurs when protein is associated with a particular section of DNA and greatly reduces transcription?
A) induction B) reduction C) compression D) positive control E) negative control
How does the highly acidic fluid in the stomach become slightly basic almost immediately upon entry into the small intestine?
A) The acids are absorbed by the small intestine as soon as they leave the stomach. B) The acids in this fluid are neutralized by the amylase secreted from the pancreas. C) The acids in this fluid remain in the stomach and only the partially digested food enters the small intestine. D) The acids in this fluid are neutralized by the sodium bicarbonate secreted from the pancreas.