Answered

A small portion of an mRNA sequence is shown below.

AAUGACUGGCUC

Starting with the first base, how many codons does this portion of the sequence contain?

A1
B4
C6
D12

Verified Answer :

daoher8

1 amino acid equals 3 codons

AAU= 3 codons
GACUGGCUC=9 codons
Each letter counts as one codon. There fore, there are 12 codons, resulting in answer D.

Answer:

Option B, 4

Explanation:

There are four nucleotides in DNA/RNA namely  

a) A - Adenine  

b) C – Cytosine

c) G – Guanine

d) T – thymine in DNA and U – Uracil in RNA

When these nucleotides group themselves in pair of three they are called codons.  

In the given small portion of an mRNA sequence,  

AAUGACUGGCUC there are total 4 codons namely  

AAU

GAC

UGG

CUC

Hence, option B is correct.

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