Question

Select the correct option:

What will be the molecular formula of a polypeptide consisting of 10 glycine molecules when the formula of glycine is $C_2{H}_5{0}_{2}N$?

• A. $C_6{H}_{12}0N_5$
• B. $C_{20}{H}_{32}{O}_{11}{N}_{10}$
• C. $C_{30}{H}_{16}{O}_6{N}_{10}$
• D. $C_{25}{H}_{16}{0}_6{N}_5$

Answer 1

The correct option is B $C_{20}{H}_{32}{O}_{11}{N}_{10}$

A polypeptide is formed by the condensation of glycine monomers,i.e., by the elimination of one water molecule during the formation of each peptide bond.When $10$ glycine $\left(C_2{H}_5{O}_{2}N\right)$, molecules participate $9H_{2}O$ molecules are eliminated, Thus resulting polypeptide will possess the molecular formula $C_{20}{H}_{32}{O}_{11}{N}_{10}$

So, the correct answer is '$C_{20}{H}_{32}{O}_{11}{N}_{10}$'.