Amino acids behave like salts rather than simple amines or carboxylic acids. Explain.

Important Questions on Biomolecules

EASY

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 14 - Biomolecules>Short Answer Type>Q 47

Structures of glycine and alanine are given below. Show the peptide linkage in glycylalanine.

Question Image

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 14 - Biomolecules>Short Answer Type>Q 48

Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in

pH

, denaturation of protein takes place. Explain the cause.

EASY

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 14 - Biomolecules>Short Answer Type>Q 49

Activation energy for the acid catalysed hydrolysis of sucrose is

6.22 kJ {mol}^{- 1}

, while the activation energy is only

2.15 kJ {mol}^{- 1}

when hydrolysis is catalysed by the enzyme sucrase. Explain.

HARD

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 14 - Biomolecules>Short Answer Type>Q 51

Which moieties of nucleosides are involved in the formation of phosphodiester linkages present in dinucleotides? What does the word diester in the name of linkage indicate? Which acid is involved in the formation of this linkage?

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 14 - Biomolecules>Short Answer Type>Q 52

What are glycosidic linkages? In which type of biomolecules are they present?

EASY

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 14 - Biomolecules>Short Answer Type>Q 53

Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units?

EASY

12th CBSE