Why are the complementary base-pairing rules so important when a cell needs to copy its DNA?
A) The cells need both strands to be accurate because each strand codes for one half of the gene.
B) As long as there is one strand, a copy can be made by following the pairing rules.
C) Unless the bases pair up correctly, the DNA strand can break apart.
D) Transcription cannot proceed unless the pairs are in the proper sequence.
B
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In the years after the completion of the human genome project, genome sequencing revealed surprisingly little amount of variation in the sequence and arrangement of nucleotides in humans
a. True b. False Indicate whether the statement is true or false
In a "silent" mutation the
A. mutation is not in DNA. B. codon that mutates does not cause a change in the amino acid specified. C. codon that mutates causes a stop codon to occur instead of the placement of an amino acid. D. mutation does not occur in a codon. E. codon that mutates causes a change in the amino acid specified.
ATP is best described as
A. an electron carrier. B. the energy molecule of cells. C. an enzyme. D. a double helix. E. All of these choices are correct.
Poliomyelitis is caused by a virus and usually leads to paralysis in those affected
Indicate whether the statement is true or false