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JEE • CHEMISTRY • BIOMOLECULES

Biomolecules practice · Easy

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Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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Showing 1-30 of 141 questions

1 Easy

1 of 141

Remembering +4 | -1

Ascorbic acid is:

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Correct option: A

Vitamin C

Option A (Vitamin C) is correct because ascorbic acid is the chemical name for Vitamin C.

2 Easy

2 of 141

Understanding +4 | -1

A nanopeptide contains ……. peptide linkages.

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Correct option: B

Option B (8) is correct because a nanopeptide, consisting of 9 amino acids, will have 8 peptide linkages.

3 Easy

3 of 141

Remembering +4 | -1

The red colouring matter of blood which transport oxygen contains an element in a system of rings. The element is:

View answer and explanation

Correct option: A

Iron

Option A (Iron) is correct because hemoglobin, the red pigment in blood responsible for oxygen transport, contains iron.

4 Easy

4 of 141

Remembering +4 | -1

Deficiency of vitamin E causes:

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Correct option: A

Sterility

Option A (Sterility) is correct because deficiency of vitamin E is known to cause reproductive issues, including sterility.

5 Easy

5 of 141

Remembering +4 | -1

Cellulose trinitrate is used in preparation of:

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Correct option: B

Explosives

Option B (Explosives) is correct because cellulose trinitrate, also known as nitrocellulose, is a highly flammable substance used in the production of explosives.

6 Easy

6 of 141

Remembering +4 | -1

A distinctive and characteristics functional group of fats is

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Correct option: B

An ester group

Option B (An ester group) is correct because fats, also known as triglycerides, are esters of fatty acids with glycerol.

7 Easy

7 of 141

Remembering +4 | -1

Iodised salt prevents ……..

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Correct option: C

Goiter

Option C (Goiter) is correct because iodized salt provides iodine, which prevents iodine deficiency and thus goiter.

8 Easy

8 of 141

Remembering +4 | -1

Scurvy is caused due to deficiency of :

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Correct option: C

Ascorbic acid

Option C (Ascorbic acid) is correct because scurvy is caused by a deficiency of Vitamin C, which is also known as ascorbic acid.

9 Easy

9 of 141

Remembering +4 | -1

The organic compounds of high physiological importance which are essential in small amounts for the well being of all human beings are:

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Correct option: B

Vitamins

Correct Answer + Core Reason: Option B (Vitamins) is correct because vitamins are organic compounds required in small amounts for human well-being.

10 Easy

10 of 141

Remembering +4 | -1

Progesterone is secreted by ……..

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Correct option: B

Ovaries

Option B (Ovaries) is correct because progesterone is a steroid hormone primarily secreted by the ovaries in females.

11 Easy

11 of 141

Understanding +4 | -1

The molecular formula of a monobasic saturated fatty acid is:

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Correct option: A

{\mathrm{C}_n}{\mathrm{H}_{2n}}{\mathrm{O}_2}

Option A is correct because the general formula for a monobasic saturated fatty acid is

C_nH_{2n}O_2

, which corresponds to the formula

C_nH_{2n+1}COOH

12 Easy

12 of 141

Remembering +4 | -1

A metal present in vitamin

{B_{12}}

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Correct option: D

Cobalt

Option D (Cobalt) is correct because Vitamin B12, also known as cyanocobalamin, contains cobalt as its central metal atom.

13 Easy

13 of 141

Remembering +4 | -1

Which of the following are all disaccharides?

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Correct option: A

Maltose, sucrose, lactose

Option A (Maltose, sucrose, lactose) is correct because all three are disaccharides, formed by the combination of two monosaccharides.

14 Easy

14 of 141

Remembering +4 | -1

Vitamin that assists in blood clotting is

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Correct option: D

Option D (K) is correct because Vitamin K is essential for the synthesis of clotting factors in the blood, which are necessary for blood coagulation.

15 Easy

15 of 141

Remembering +4 | -1

Glycogen on hydrolysis gives:

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Correct option: D

Glucose

Option D (Glucose) is correct because glycogen, a polysaccharide, is composed of glucose monomers and yields glucose upon hydrolysis.

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16 Easy

16 of 141

Remembering +4 | -1

Carbohydrates are:

View answer and explanation

Correct option: B

Polyhydroxy aldehydes or ketones

Option B is correct because carbohydrates are defined as polyhydroxy aldehydes or ketones, or substances that produce them upon hydrolysis.

17 Easy

17 of 141

Remembering +4 | -1

Which of the following compounds is known as the antisterility factor?

View answer and explanation

Correct option: A

\alpha

-tocopherol

Option A (

\alpha

-tocopherol) is correct because it is known as Vitamin E, which acts as an antisterility factor.

18 Easy

18 of 141

Analyzing +4 | -1

Which of the following reactions could not be explained on the basis of open chain structure of glucose?

View answer and explanation

Correct option: A

Pentaacetate of glucose does not react with

{NH}_2 {OH}

Option A is correct. The fact that pentaacetate of glucose does not react with NH2OH indicates the absence of a free -CHO group, which contradicts the open-chain structure of glucose.

19 Easy

19 of 141

Remembering +4 | -1

Cellophane is made from:

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Correct option: A

Cellulose

Option A (Cellulose) is correct because cellophane is a thin, transparent sheet made from regenerated cellulose.

20 Easy

20 of 141

Remembering +4 | -1

Non-reducing sugar, among the following is:-

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Correct option: B

Sucrose

Option B (Sucrose) is correct because sucrose is a non-reducing sugar, meaning it cannot reduce other substances.

21 Easy

21 of 141

Remembering +4 | -1

Glucose is used in:

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because glucose is used in the manufacture of vitamin C, as a preservative, and in the manufacture of alcohol.

22 Easy

22 of 141

Remembering +4 | -1

Lactose on hydrolysis gives

View answer and explanation

Correct option: B

\alpha \mathrm{ - }

D – galactose and

\beta \mathrm{ - }

D – glucose

Option B (

\alpha \mathrm{ - }

D – galactose and

\beta \mathrm{ - }

D – glucose) is correct because lactose is a disaccharide that hydrolyzes into these two monosaccharides.

23 Easy

23 of 141

Remembering +4 | -1

Ascorbic acid is also known as

View answer and explanation

Correct option: C

Vitamin C

The correct answer is C (Vitamin C) because ascorbic acid is the chemical name for Vitamin C, an essential nutrient for humans.

24 Easy

24 of 141

Remembering +4 | -1

The antibodies necessary to protect new born babies from infection are derived from:

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Correct option: C

Mother’s milk

Option C (Mother’s milk) is correct because mother's milk contains antibodies (especially IgA) that provide passive immunity to newborns.

25 Easy

25 of 141

Application +4 | -1

There are 20 naturally occurring amino acids. The maximum number of tripeptides that can be obtained is

View answer and explanation

Correct option: A

8000

Option A (8000) is correct because with 20 amino acids, the number of tripeptides is 20*20*20 = 8000.

26 Easy

26 of 141

Remembering +4 | -1

Insulin, a protein acts as:

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Correct option: B

A hormone

Option B (A hormone) is correct because insulin is a protein hormone secreted by the pancreas that regulates blood sugar levels.

27 Easy

27 of 141

Remembering +4 | -1

All drying oils contain a large amount of:

View answer and explanation

Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because drying oils contain a large amount of both Linoleic and Linolenic acid.

28 Easy

28 of 141

Remembering +4 | -1

Dalda is prepared from oils by

View answer and explanation

Correct option: B

Reduction

The correct answer is B (Reduction) because Dalda (vegetable ghee) is prepared by the hydrogenation (reduction) of oils.

29 Easy

29 of 141

Remembering +4 | -1

Nucleotides and nucleosides mainly differ from each other in:

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Correct option: A

Presence of phosphate units

Option A (Presence of phosphate units) is correct because nucleotides contain phosphate groups, while nucleosides do not.

30 Easy

30 of 141

Remembering +4 | -1

Which of the following is not a deficiency
with respect to the vitamin given?

View answer and explanation

Correct option: D

Vitamin-K – Easy clotting of blood

Option D (Vitamin-K – Easy clotting of blood) is correct because Vitamin K is essential for blood clotting, so a deficiency would lead to impaired clotting, not easy clotting.

Revision notes and key takeaways

Review BIOMOLECULES in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 141 single-correct-answer MCQs on BIOMOLECULES.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

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