LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What does “universal genetic code” mean?
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All living organisms have the same DNA
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All human cells have the same 46 chromosomes
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All species use the same DNA codon amino acid pairings
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Living organisms share a common ancestor
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Explanation:
Detailed explanation-1: -The genetic code is universal. All known living organisms use the same genetic code. This shows that all organisms share a common evolutionary history. The genetic code is unambiguous. Each codon codes for just one amino acid (or start or stop).
Detailed explanation-2: -Each codon corresponds to a single amino acid (or stop signal), and the full set of codons is called the genetic code. The genetic code includes 64 possible permutations, or combinations, of three-letter nucleotide sequences that can be made from the four nucleotides.
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