Question

A phosphate unit is present between two sugars. The number of bonds present in phosphate unit is/are :

• A. 1 ${}_{d-p}$
• B. 1 ${}_{p-p}$
• C. 2 ${}_{d-p}$
• D. 2 ${}_{p-p}$

Answer 1

The correct option is A 1 ${}_{d-p}$

A phosphate unit is present between two sugars. The number of bonds present in phosphate unit is 1 ${}_{d-p}$. The phosphate group forms one bond with the deoxyribose sugar through an ester bond between one of its negatively charged oxygen groups and the 5 $-OH$ of the sugar.