Question

a) Amino acids can be classified into essential amino acids and non-essential amino acids. 

i) What is the basis of such classification? 

ii) Write one example each for essential and non-essential amino acids. 

b) Write any two differences between DNA and RNA

Answer 1

a) i) The amino acids which can be synthesized in body are known as nonessential amino acids. Those amino acids which can not be synthesized in the body and must be obtained through diet are known as essential aminoacids. 

ii) Essential amino acids e.g. Valine, Lysine 

Non -essential amino acids e.g. Glycine, Alanine 

b)

DNA	RNA
1) Double helix structure	1) Single helix
2) Sugar- deoxyribose	2) Sugar-Ribose
3) Bases – A, G, C, T	3) Bases A, G, C, U
4) Transmits Traits	4) Responsible for protein synthesis