Question # 1

An element that is not an essential par of proteins is

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O

N

H

S

The most complex strueture a single polypetide can assume is

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1° structure

2°structure

3° structure

4° structure

Based on the physico-chemical properties, proteins may be classified into the following types

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Simple proteins

Compound proteins

Derived proteins

All of the above

UV rays inactivate enzymes because they

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change sequence of amino acids of enzymes

They add prosthetic group to them

They increase their specificity

affect structure of enzymes

Glucose is converted into ethanol by the enzyme present in the yeast

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Urease

Zymase

Invertase

Sucrase

Enzymes have been classified on the basis of

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protein structure

prosthetic groups

type of reaction they catalyse

bonding in them

The enzymes that catalyse the addition or removal of ammonia are:

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Lyases

Ligases

Transferases

Kinses

Primar structure of proteins refers to

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Coling and folding in form of specilie structure

3d structure

Number of amino acids in a chain

Alpha and Beta sheets

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

Which of the following is not a property of enzymes?

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extraordinary speciffcity

reversibility of reactions

high efficiency

minimum activity at optimum T

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

Lactoglobulin is found in

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nucleus

nerve cells

Plants only

muscles and in plants

Proteins loose their ability to work

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by slight heating

by change in structure

by slight cooling

when inside the body

Which of the following bond is responsible for joining the amino acids in proteins?

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Metallic Bond

Di sulfide bond

Peptide Bond

The protein component of enzyme ls called

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apoenzyme

proenzyme

holoenyme

co-enzyme

Dehydrogenase is an example of

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ligase

oxidoreductase

lyase

hydrolase

Third order of protein structure refers to

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Bending of protein chain

Three-dimensional structure of protein

Number and sequence of amino acids

Site of disulphide bonds

Prosthetic groups are

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helical structures in protein

sulphur containing parts of protein

non-protein parts in compound proteins

sites for hydrogen bonding

Simplest Structure of a protein that has only covalent bonding between amino acids is

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2° structure

3°structure

1° structure

4° structure

Enzymes are

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simple proteins

derived proteins

compound proteins

conjugated proteins

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