22

Which of the following are examples of denaturation of protein?

Boiling eggs

Curdling of milk

Cutting of nails

Straightening of curly hairs

Select the correct answer using the codes given below:

A

(iii)and(iv)

B

(i)and(ii)

C

(i),(ii)and(iv)

D

(i),(iii)and(iv)

E

 

Answer

C

Instruction

 

 

 

 

 

 

23

In which of the following Pairs do both members contain the protein , keratin?

A

Hairs, nail

B

Nails, eyes

C

Skin, tongue

D

Bones, blood

E

 

Answer

A

Instruction

 

 

24

In the oxidation of fats and oil, which part of the molecules is attached by atmospheric oxygen?

A

Ester lingakes

B

Carbons-carbons double bond

C

Hydroxy groups

D

Carboxyl groups

E

 

Answer

B

Instruction

 

 

25

Partial hydrogenation of a fat or an oil does which of the following ?

A

Produce fatty acid salts

B

Decreases the degree of fatty acids unsaturation

C

Decrease the melting point

D

Increases the number of fatty acid residue present

E

 

Answer

B

Instruction

 

 

26

Fish like mackerel, tuna and salmon contain

A

Omega-2 acids

B

Omega-3 acids

C

Omega-4 acids

D

Omega-5 acids

E

 

Answer

B

Instruction

 

 

 

27

Gall bladder stones are deposits of

Calcium

Glucose

Cholesterol

Chose the right option

A

(i)and(ii)

B

(i)and(iii)

C

(i)only

D

(iii)only

E

 

Answer

D

Instruction

 

 

28

ATP stands for

A

Adenosine triphosphate

B

Alanine triphosphate

C

Adrenaline triphosphate

D

Asparagine triphosphate

E

 

Answer

A

Instruction

 

 

29

An error in base sequence in a gene that I re-produced during DNA replication is called

A

Catenation

B

Transformation

C

Mutation

D

Transcription

E

 

Answer

C

Instruction

 

 

 

 

 

 

 

30

Which of the following is not a structural sub-unit of a nucleotide ?

A

A nitrogen-containing heterocyclic base

B

A pentose sugar

C

An amino acid

D

A phosphate

E

 

Answer

C

Instruction

 

 

31

Which of the following elements are present in the backbone of a nucleic acid molecule?

Nitrogen

Oxygen

Carbon

Hydrogen

Select the correct answer using the code given below:

A

(ii),(iii)and(iv)

B

(i),(iii)and(iv)

C

(iii)and(iv)

D

(iii)only

E

 

Answer

A

Instruction

 

 

32

Ribozymes are enzymes made of

A

Deoxyribonucleic acids

B

Ribonucleic acids

C

Fatty acids

D

Hydroxy acids

E

 

Answer

B

Instruction

 

 

 

 

 

 

33

What happens to substrate molecules at an enzyme active site ?

A

They become covalently bonded to the enzyme

B

They become catalysts

C

They react with oxygen in the air

D

They undergo change to a desired product

E

 

Answer

D

Instruction

 

 

34

Chloroquine is an

A

Antibiotic

B

Antibacterial

C

Antimalarial

D

Antifungal

E

 

Answer

C

Instruction

 

 

35

Which of the following is an example of an anticoagulant drug ?

A

Aspirin

B

Morphine

C

Penicillin

D

Streptomycin

E

 

Answer

A

Instruction

 

 

36

Antihypertensive drugs

A

Relieve pain

B

Suppress cough

C

Reduce blood pressure

D

Elevate the mood

E

 

Answer

C

Instruction

 

 

 

37

Beta-carotene is a precursor for which of the following vitamins ?

A

Vitamin-A

B

Vitamin-E

C

Vitamin-D

D

Vitamin-K

E

 

Answer

A

Instruction

 

 

38

The precursor for Vitamin D is

A

Folic acid

B

Cholesterol

C

Thiamine

D

Ascorbic acid

E

 

Answer

B

Instruction

 

 

39

The vitamin which can be biosynthesized by the body is

A

Vitamin-A

B

Vitamin-C

C

Vitamin-D

D

Vitamin-E

E

 

Answer

C

Instruction

 

 

39

The vitamin which can be biosynthesized by the body is

A

Vitamin-A

B

Vitamin-C

C

Vitamin-D

D

Vitamin-E

E

 

Answer

C

Instruction