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Process of Translation

What is a cod...

Question

What is a codon? How many codons serve as stop (non-sense) codons and how many as initiating codons?

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Solution

Initiation codon- the synthesis of the polypeptide chain is initiated by initiation codon it is AUG which is methionine.

Termination codons are also known as a nonsense codon. These stop the protein translation. There are three termination codons.
UAA,UGG,UAG.

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Q. (a) How many codons code for amino acids and how many do not?
(b) Explain the following giving one example of each
(i) Unambiguous and specific codon
(ii) Degenerate codon
(iii) Universal codon
(iv) Initiator codon.

Q. How many sense codons code for

20

known essential amino acids?

Q. Select the incorrect statement.
a. Six codons do not code for any amino acid.
b. Codon reading of mRNA is contiguous.
c. Three codons function as stop codons.
d. Initiator codon AUG codes for methionine.

Q. Which of the following option shows correct matching of Column - I and Column - II.

Column - I	Column - II
(i) Degeneration codon	(a) AUG
(ii) Initiation codon	(b) UAG
(iii) Non - sense codons	(c) AGU
(iv) Anti codon (UCA)	(d) AGA

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