Question

A gene with 600 nucleotides will code for how many amino acids?

• A. 200
• B. 600
• C. 400
• D. 900

Answer 1

The correct option is A 200

As we know that set of three nucleotides constitute a codon. A combination of four nucleotides and 20 essential amino acids makes a genetic code for 64 different combinations (4 x 4 x 4). Here, a gene with 600 nucleotides will code for 600/3 = 200 amino acids, because a set of three nucleotides will make one codon, 200 codon = 200 amino acids.

So, the correct answer is option A.