AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many nucleotide bases are needed to code for 5 amino acids?
A
5
B
10
C
15
D
20
Explanation: 

Detailed explanation-1: -In the given mRNA sequence there are 15 nucleotide . One amino acid codes triplet three nucleotide. So, after addition of adenosine residue the total number of nucleotide is 16. So five amino acids will be coded by the mRNA sequence.

Detailed explanation-2: -A 15 nucleotide mRNA sequence could only encode up to 4 amino acids (15 nucleotides-3 nucleotide stop codon = 12 nucleotides = 4 amino acids).

Detailed explanation-3: -Thus, the correct answer is ‘153.

Detailed explanation-4: -The correct answer is (c): three. The mRNA templates contain the code for proteins as nucleotide triplets called codons.

There is 1 question to complete.