★ DNA, RNA, Proteins Quiz
What is a codon?
A. A sequence of three nitrogen bases in DNA that specifies an amino acid
B. A sequence of three nitrogen bases in tRNA that corresponds to an amino acid
C. A sequence of three nitrogen bases in mRNA that specifies an amino acid
D. A sequence of three nitrogen bases in rRNA that forms part of the ribosome
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How many strands does DNA have?
A. One
B. Two
C. Three
D. Four
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