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JEE Advanced > Biomolecules

Explore popular questions from Biomolecules for JEE Advanced. This collection covers Biomolecules previous year JEE Advanced questions hand picked by experienced teachers.

Q 1.

Correct4

Incorrect-1

The pair of compounds showing positive Tollens reagent test is

A

glucose and sucrose

B

fructose and sucrose

glucose and fructose

D

acetophenone and pentanal

Explanation

Q 2.

Correct4

Incorrect-1

Two forms of D-glucopyranose are frequently called

A

enantiomers

anomers

C

diastereomers

D

stereoisomers

Explanation

Q 3.

Correct4

Incorrect-1

Celluluse upon acctylation with excess acctic anhydride {tex} / \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex} (catalytic) gives cellulose triacctate whose structure is

B

C

D

Explanation

Q 4.

Correct4

Incorrect-1

The correct statement about the following disaccharide is

Ring (I) is pyranose with {tex} \alpha {/tex} -glycosidic link

B

Ring (I) is furanose with {tex} \alpha {/tex} -glycosidic link

C

Ring (II) is furanose with {tex} \alpha {/tex} -glycosidic link

D

Ring (II) is pyranose with {tex} \beta {/tex} -glycosidic link

Explanation

Q 5.

Correct4

Incorrect-1

The carbohydrate

is

A

a ketohexose

an aldohexose

C

an {tex} \alpha {/tex} -furanose

D

an {tex} \alpha {/tex} -pyranose

Explanation

Q 6.

Correct4

Incorrect-1

The chemical extracted from the plant Rauwolfia serpentine is:

A

Aspirin

B

Quinine

C

Bithional

Reserpine

Q 7.

Correct4

Incorrect-1

Which of the following biomolcules is insoluble in water?

{tex} \alpha {/tex} - Keratin

B

Haemoglobin

C

Ribonuclease

D

Adenine

Q 8.

Correct4

Incorrect-1

In addition to an aldehyde group, glucose contains:

A

One secondary and four primary OH groups

One primary and four secondary OH groups

C

Two primary OH and three secondary OH groups

D

Three primary OH and two secondary OH groups

Q 9.

Correct4

Incorrect-1

Which of the following carbohydrates cannot be directly utilised by the human body as a source of energy?

A

Glucose

B

Sucrose

C

Glycogen

Cellulose

Q 10.

Correct4

Incorrect-1

The human body does not produce:

A

Enzymes

B

DNA

Vitamins

D

Hormones

Q 11.

Correct4

Incorrect-1

During aerobic respiration, one molecule of glucose produces:

A

2 ATP molecules

B

50 ATP molecules

38 ATP molecules

D

36 ATP molecules

Q 12.

Correct4

Incorrect-1

{tex} \alpha - {/tex} and {tex} \beta {/tex} - Glucose differ in the orientation of the {tex} ( - \mathrm { OH } ) {/tex} group around:

{tex} \mathrm C_1 {/tex}

B

{tex} \mathrm C _ { 2 } {/tex}

C

{tex} \mathrm { C } _ { 3 } {/tex}

D

{tex} \mathrm { C } _ { 4 } {/tex}

Q 13.

Correct4

Incorrect-1

The hormone which controls the processes of burning of fats, proteins, and carbohydrates and liberates energy in the body is:

A

Thyroxine

B

Adrenaline

Insulin

D

Cortisone

Q 14.

Correct4

Incorrect-1

Which carbohydrate is an essential constituent of plant cells?

A

Starch

Cellulose

C

Sucrose

D

Vitamins

Q 15.

Correct4

Incorrect-1

At {tex} \mathrm { pH } = 4 , {/tex} glycine exists as:

A

C

D

Explanation