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Q 11 :

Uracil is a base present in RNA with the following structure % of N in uracil is ________. [2023]

Given:
Molar mass of N = 14 g ${mol}^{- 1}$
O = 16 g ${mol}^{- 1}$
C = 12 g ${mol}^{- 1}$
H = 1 g ${mol}^{- 1}$

0%

(25)

$\frac{2 \times 14}{4 \times 14 + 4 \times 1 + 2 \times 16 + 2 \times 14} \times 100 = 25 %$

Q 12 :

Both human DNA and RNA are chiral molecules. The chirality in DNA and RNA arises due to the presence of [2026]

Chiral phosphate unit
L–sugar component
D–sugar component
Base unit

1

2

3

4

(3)

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