Question

Match list I with list II and select this correct answer using the codes given below the lists.

	List-I		List-II
$\left(\right.p\left.\right)$	Nucleic acids	$1.$	DNA
$\left(\right.q\left.\right)$	Uracil	$2.$	Hormones
$\left(\right.r\left.\right)$	Thymine	$3.$	Polynucleotides
$\left(\right.s\left.\right)$	Double-helix structure	$4.$	RNA

• A. (p)-4, (q)-3, (r)-1, (s)-1
• B. (p)-3, (q)-4, (r)-1, (s)-1
• C. (p)-3, (q)-1, (r)-4, (s)-1
• D. (p)-3, (q)-1, (r)-1, (s)-4

Answer 1

Answer: (B)

$A.$ Nucleic acids are long polymers in which monomeric units are nucleotides.
$B.$ RNA has the base uracil in place of thymine.
$C.$ DNA has the base thymine paired with adenine.
$D.$ DNA has double-helix structure. The two strands of DNA helix are said to be complementary to each other in the sense that the sequence of bases in one strand automatically determines that of order. Base pairs in DNA are held by H-bonds denoted by dotted lines.