Question

You are synthesizing a 5 amino acid containing peptide from the pool of 20 standard amino acids by choosing amino acids randomly. What is the probability of selecting Gly-Gly-Gly-GlyGly?

• A. $0$
• B. $1/{20}^5$
• C. $1/20$
• D. $1/(20\times 5)$

Answer 1

Answer: (B)

$1/{20}^5$

For synthesizing a 5 amino acid containing peptide from a pool of 20 standard amino acid, from the rule of the probability of frequency, the probability of getting Gly-Gly-Gly-Gly-Gly would be ($\frac{1}{20}$) ${}^5$

So, the correct answer is option B.