C $$-$$ N bond length in proteins is longer than usual bond length of N $$-$$ C bond.

Spectroscopic analysis shows planar structure of group.

C $$-$$ N bond length in proteins is smaller than usual bond length of C $$-$$ N bond.

None of the above.

Starch is a polymer of $$\alpha $$-glucose.

Amylose is a component of cellulose.

Proteins are composed of only one type of amino acid.

In cyclic structure of fructose, there are four carbons and one oxygen atom.

2, 3-dimethylpentane

2, 2-dimethylbutane

2-methylhexane

none of these

centrifugation

plasmolysis

reverse osmosis

sedimentation