Question

question 4
a dna gene coding sequence that is 90 nucleotides long could ultimately result in a protein of how many amino acids?
a 270
b 30
c 90
d 9
e 45

Explanation:

Step1: Recall the translation rule

In protein - synthesis, 3 nucleotides (a codon) code for 1 amino - acid.

Step2: Calculate the number of amino - acids

Given 90 nucleotides, the number of amino - acids $n=\frac{90}{3}$.
$n = 30$

Answer:

B. 30