OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many amino acids can be represented by a single 3-base DNA sequence?
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1
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3
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6
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8
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Explanation:
Detailed explanation-1: -Thus, early researchers quickly determined that the smallest combination of As, Cs, Gs, and Us that could encode all 20 amino acids in RNA would be a triplet (three-base) code. A triplet combination, or codon, would allow for 64 possible combinations (four bases at each of three positions = 4 × 4 × 4 = 64).
Detailed explanation-2: -Triplets produce 64 codons, which are enough to provide at least one codon for each of the 20 amino acids. With triplet codons, 64 possible combinations result (four bases raised to the power of three bases in a triplet codon, 43 = 64).
Detailed explanation-3: -Watch next. A minimal genetic code requires only 21 codons-one for each amino acid, and one for a stop signal.
There is 1 question to complete.