Question # 1

The enzyme which is found in saliva, accelerates the conversion of starch into sugar is

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Pepsin

Thrombin

Ptyalin

Fumarase

The structure of protein helps protein to

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be in proper shape

attach substrate

perform is function

All of these

Increased concentration of enzyme alkaline phosphatase is a sign of

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hemophilia

heart disease

thrombosis

rickets

The most abundant protein in the human body is

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Collagen

Keratin

Myosin

Albumin

In proteins, the alpha-helix and Beta-pleated sheet are examples of

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^{Primary Structure}

Secondary Structure

Tertiary Structure

Quaternary 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

For a particular halogen, the reactivity of alkyl halides

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remains same with C-increase

decreases with C-increase

increases with C-increase

decreases with C-decrease

Enzymes have been classified on the basis of

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protein structure

prosthetic groups

type of reaction they catalyse

bonding in them

Enzymes are

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simple proteins

derived proteins

compound proteins

conjugated proteins

Which of the following is not a category of proteins based upon their function?

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genetic

Regulatory

nucleo

structural

The protein component of enzyme ls called

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apoenzyme

proenzyme

holoenyme

co-enzyme

Enzymes consist of

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proteins only

proteins and non-protein parts

fats only

futs and non-fatty components

An example of simple protein is

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lipoprotein

Cholesterol

lecithin

globulin

L-asparginase is helpful in treatment of

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skin disease

blood cancer

heart failure

obstructive jaundice

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

Dehydrogenase is an example of

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ligase

oxidoreductase

lyase

hydrolase

Lactoglobulin is found in

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nucleus

nerve cells

Plants only

muscles and in plants

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

Abumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Simple Protein

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

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Lyases

Ligases

Transferases

Kinses

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

Denaturation of proteins is often characterised by

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Loss of biological activity

Aiways being irreversible

Being ereater the lower the temperature

Changes in primary structure

Amino acids react together to form the primary structure of proteins which is accompanied by

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addition of water

addition of ammonia

removal of ammonia

removal of water

An element that is not an essential par of proteins is

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O

N

H

S

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

Dehydrogenase is an erample of

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Transferase

Hydrolase

Lyase

Oxido-reductase

Phosphoprotein comes under the type of proteins

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Simple protein

Derived protein

Conjugated

Both A & B

Which of the following is the element not present in all proteins?

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Carbon

Hydrogen

Nitrogen

Sulphur

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