Question

Identify the correct pair of statements.
$\left(i\right)$ Alternate name of thymine is 5-methyl uracil
$\left(ii\right)$ Arachidonic acid molecule contains less number of carbons than palmitic acid
$\left(iii\right)$ Cellulose contains complex halices
$\left(iv\right)$ Aquaporin is a polypeptide

• A. $\left(ii\right),\left(iii\right)$
• B. $\left(i\right),\left(ii\right)$
• C. $\left(ii\right),\left(iv\right)$
• D. $\left(i\right),\left(iv\right)$

Answer 1

The correct option is D $\left(i\right),\left(iv\right)$

i) Thymine is a nitrogenous base which pairs with adenine by the formation of two hydrogen bond. The molecular structure includes a ring of carbon and nitrogen with nitrogen at first and third position. A methyl group is attached to fifth carbon and an oxygen atom is attached to the second carbon. It is also known as 5-methyl uracil.

iv) Aquaporin is a water transport channel present in the cell membrane which is present in the cell. It helps in the selective transport of the water molecules.

Whereas, cellulose is the polysaccharide of unbranched chain and arachidonic acid ($C_{20}{H}_{32}{O}_2$) has more number of the carbon atom as compared to palmitic acid ($C_{12}{H}_{22}{O}_2$).

So, the correct answer is option D.