A sequence of three nucleotides on DNA is a
codon; a single amino acid in the protein to be made
triplet; the entire protein to be made
triplet; a single amino acid in the protein to be made
codon; gene
The Correct Answer is C
A. codon; a single amino acid in the protein to be made: A codon is a sequence of three RNA nucleotides, not DNA. Codons are found in mRNA during translation.
B. triplet; the entire protein to be made: A triplet codes for one amino acid, not the entire protein.
C. triplet; a single amino acid in the protein to be made: In DNA, a triplet is a group of three nucleotide bases that codes for a single amino acid during protein synthesis.
D. codon; gene: A codon (in mRNA) corresponds to one amino acid, not an entire gene.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. cellulose: Humans lack the enzyme cellulase, so we cannot break down cellulose, a plant polysaccharide, for energy.
B. starch: Starch is digestible; humans have amylase to break it down into glucose.
C. glycogen: Glycogen is stored in human liver and muscle and is easily digested.
D. monosaccharides: These are already single sugar units, like glucose, and require no digestion.
Correct Answer is A
Explanation
A. As body temperature rises, sweating occurs to cool the body:
An example of negative feedback, where the body counters a change to restore normal state.
B. After drinking large amounts of water, urine output decreases to raise blood volume:
Urine output would actually increase to excrete the excess water and maintain volume.
C. Decreases in blood pressure cause a corresponding decrease in heart rate:
A decrease in blood pressure should cause the heart rate to increase (compensatory response).
D. As blood pressure falls, blood flow to the heart decreases:
The body usually increases heart rate and vasoconstriction to maintain cardiac output.
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