Imagine that a mutation in a DNA molecule results in the codon CCU being changed to CCC. Both of these codons code for proline. What characteristic accounts for the fact that more than one codon can code for the same amino acid?
A) the ambiguity of the genetic code
B) the redundancy of the genetic code
C) the universality of the genetic code
D) mutations in the genetic code
B
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Fluorescent staining is more sensitive than conventional carbolfuchsin stains. What counterstain is used during the procedure?
a. Methylene blue b. Crystal violet c. Potassium permanganate d. Auramine-rhodamine
If the volume of a cell increases, its surface area will
a. decrease. b. remain the same. c. increase proportionately. d. increase to a greater degree. e. increase to a lesser degree.
Which of the following components of PCR ensures amplification of the target DNA sequence only, despite the presence of many other DNA sequences?
A. High temperatures B. Polymerases C. dNTPs D. Primers
The possible combinations of alleles in the gametes of an individual with the genotype aaBb are
A. AB, Ab, aB, ab. B. aa, Bb. C. aB, ab. D. aa, ab, aB.