Question # 1

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

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

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

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

An example of bydrolase is

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Amylase

Lipase

Fumarase

A,C

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

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Pepsin

Thrombin

Ptyalin

Fumarase

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

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Carbon

Hydrogen

Nitrogen

Sulphur

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

An example of simple protein is

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lipoprotein

Cholesterol

lecithin

globulin

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

The type of isomerism shown by alkyl halides is

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geometric

functional

positional

metamerism

Increased concentration of enzyme alkaline phosphatase is a sign of

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hemophilia

heart disease

thrombosis

rickets

Abumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Simple Protein

Lactoglobulin is found in

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nucleus

nerve cells

Plants only

muscles and in plants

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

The most complex strueture a single polypetide can assume is

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1° structure

2°structure

3° structure

4° structure

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

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

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^{Primary Structure}

Secondary Structure

Tertiary Structure

Quaternary Structure

An element that is not an essential par of proteins is

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O

N

H

S

Enzymes are

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simple proteins

derived proteins

compound proteins

conjugated proteins

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

Proteins have linkage between amino acids

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imide

amide

ester

ether

Collagen is a fibrous protein present most abundantly in

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heart

nucleus

connective tissues

Arteries

Enzymes consist of

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proteins only

proteins and non-protein parts

fats only

futs and non-fatty components

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

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Urease

Zymase

Invertase

Sucrase

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

Dehydrogenase is an example of

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ligase

oxidoreductase

lyase

hydrolase

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

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Ligases

Lyases

Isomerases

Transferases

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