Question

(i) Write the structural difference between starch and cellulose?
(ii) What type of linkage is present in nucleic acids?
(iii) Give one example each for fibrous protein and globular protein?

Answer 1

1. Cellulose is mostly linear chains of glucose molecules linked together by beta 1,4 glycosidic bonds whereas starch is found in both linear and branched chains.
Cellulose has beta 1,4 linkage between the glucose units while starch has alpha 1,4 linkages.

2. Nucleic acids are formed when nucleotides come together through phosphodiester linkages between the 5' and 3' carbon atoms. A Nucleic acid sequence is the order of nucleotides within a DNA.

3. Fibrous protein: Keratin,Spectrin.

Globular protein: Albumin, Haemoglobin.