Question # 1

Dehydrogenase is an example of

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ligase

oxidoreductase

lyase

hydrolase

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

An element that is not an essential par of proteins is

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O

N

H

S

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

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Carbon

Hydrogen

Nitrogen

Sulphur

Increased concentration of enzyme alkaline phosphatase is a sign of

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hemophilia

heart disease

thrombosis

rickets

Enzymes consist of

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proteins only

proteins and non-protein parts

fats only

futs and non-fatty components

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

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

The enzymes that bring about exchange of functional groups like phosphate are called

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Ligases

Lyases

Isomerases

Transferases

Fe+2 is the co-factor for

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Chrome oxidase

Glucose-6-phosphatase

Carbonic anhydrase

Hydrolase

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

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

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

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

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

An example of simple protein is

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lipoprotein

Cholesterol

lecithin

globulin

Proteins have linkage between amino acids

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imide

amide

ester

ether

Dehydrogenase is an erample of

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Transferase

Hydrolase

Lyase

Oxido-reductase

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

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Pepsin

Thrombin

Ptyalin

Fumarase

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

Abumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Simple Protein

The specifie substance (metabolite) that fits on the enzyme surface and is converted to products is called

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Co-factor

Isoenzyme

Prosthetic group

Substrate

Enzymes are

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simple proteins

derived proteins

compound proteins

conjugated proteins

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

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Urease

Zymase

Invertase

Sucrase

The most abundant protein in the human body is

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Collagen

Keratin

Myosin

Albumin

The protein component of enzyme ls called

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apoenzyme

proenzyme

holoenyme

co-enzyme

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