Properties Of A.a

Question 1

Molecular weight

Answer 1

Depends on the no of a.a residues
If no of a.a ^ then molecular weight also increases

Question 2

Shape of proteins

Answer 2

Globular eg,insulin
Oval
Fibrous
Elongated

In common ,wide variety of shapes

Question 3

Isoelectric pH

Answer 3

Nature of a.a determines the pH
Electrically neutral
Min solubility and buffering action and max precipitability

Question 4

To determine acidic and basic proteins

Answer 4

Lysin +arginine/ Glu +Asp

Basic- If Greater than 1
Acidic- If less than 1

Question 5

Precipitate property

Answer 5

Hydration of polar group is there
So it exist in colloidal soln
Proteins ppted by dehydration/neutralization of polar group

Question 6

Quaternary structure

Answer 6

Majority made if single polypeptide
Some consist of 2 or more polypeptide chain called olygomers
Individual polypeptide chains -monomers/protomers/subunits

Question 7

Bond in Quaternary

Answer 7

Non covalent namley hydrogen, hydrophobic, ionic

Question 8

Role of Quaternary structure of protein

Answer 8

Regulation of metabolism
Cellular function
Eg,hemoglobin, aspartate transcarbomaylase,lactose dehydrogenase (LDH)