The concept that a set of three nucleotides specifies a particular amino acid provides the basis for
A) the one-gene-one-enzyme hypothesis.
B) the one-gene-one-polypeptide hypothesis.
C) the genetic code.
D) biochemical reactions among nucleic acids.
E) All of these
C
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Which one of the following is NOT considered to be one of the macronutrients needed by plants?
A. manganese B. sulfur C. phosphorus D. nitrogen E. potassium
Many childhood diseases caused by viral infections of the upper respiratory tract can usually be diagnosed by
A. inspection of the rash. B. the type of cough. C. the type of fever. D. the incubation period.
When genotypes at one locus of a chromosome are nonrandomly associated with the genotypes at another locus of the same chromosome, the two loci are ________
A) in linkage equilibrium B) in linkage disequilibrium C) nonrandomly associated D) None of the above.
In any DNA molecule, the number of thymine bases will:
A) always be equal to the number of cytosine bases. B) always be equal to the number of adenine bases. C) always be equal to the number of uracil bases. D) sometimes be equal to the number of cytosine bases and sometimes equal to the number of adenine bases. E) sometimes be equal to the number of guanine bases and sometimes equal to the number of cytosine bases.