OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Research has shown that the genetic code is not entirely universal. Which research finding has shown this?
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Some amino acids are coded for by more than one codon.
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There are differences between the base sequences of genes in different species.
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In some organisms the genetic code for mitochondria differs from the genetic code for the nucleus.
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Some codons code for the addition of an amino acid and some code for the termination of translation.
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Explanation:
Detailed explanation-1: -The elucidation of the genetic code was one of the greatest discoveries of the 20th century. The genetic code is an algorithm that connects 64 RNA triplets to 20 amino acids, and functions as the Rosetta stone of molecular biology. Sir Francis Crick, La Jolla 1982, Photograph by Norman Seeff.
Detailed explanation-2: -The universal genetic code is used without changes in chloroplasts and in mitochondria of green plants. Non-plant mitochondria use codes that include changes from the universal code.
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