Question

Match the following and find the correct option.

$I$	$II$
$\left(a\right)$ Hydrogen bond	$\left(i\right)$ Adenine - deoxyric base
$\left(b\right)$ N-glycosidic linkage	$\left(ii\right)$ Glucose - Fructose
$\left(c\right)$ Phosphodiester bond	$\left(iii\right)$ Leucine - Glycine
$\left(d\right)$ Peptide bond	$\left(iv\right)$ Nucleotide - Nucleotide in polynucleotide chain
	$\left(v\right)$ Guanine - Cytosin on opposite strands of DNA

• A. $a-v,b-iii,c-iv,d-ii$
• B. $a-i,b-iv,c-v,d-ii$
• C. $a-v,b-i,c-iv,d-iii$
• D. $a-ii,b-i,c-v,d-iii$

Answer 1

Answer: (C)

$a-v,b-i,c-iv,d-iii$

a) The nitrogenous bases are purines and pyrimidines. The purines are adenine and guanine. The pyrimidines are thymine and cytosine. Purines pair with the pyrimidines by hydrogen bonds. Adenine pairs with thymine by two hydrogen bond while the cytosine pairs with the guanosine by three hydrogen bonds.

b) DNA is made up of a nitrogenous base, phosphate, and sugar. It has deoxyribose sugar which has hydrogen at second carbon. The sugar is linked to nitrogenous base at the first carbon by the glycosidic bond.

c) DNA is the chain of polynucleotide which are joined by the phosphodiester bonds. The two nucleotide is linked by the phosphodiester bond. It is formed by the linkage between the 3' carbon atom of one sugar molecule and the 5' carbon atom of another.

d) The proteins are made up of amino acids. The amino acids are linked together by peptide bonds to form a protein. The peptide bond is formed by the linkage of the carboxyl group of one amino acids with the amino group of the amino acids.

So, the correct answer is option C.