Question

Question 50

The reading frame begins with a _____ and is read_____.

a.		promoter, in groups of three bases
b.		start codon, one base at a time
c.		promoter, one base at a time
d.		start codon, in groups of three bases

Answer 1

Option D

An open reading frame is a sequence of codons (set of 3 nucleotides) starting from start codon (AUG) and ending at stop codon (UAA, UGA, UAG).

The open reading frame is present on messenger RNA. It is read by ribosomes during the process of translation. The codon present on open reading frame are complementary to transfer RNA. The interaction between one codon and one anticodon leads to the addition of 1 amino acid on the growing polypeptide chain.

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