Long chain sulphonic acid esters

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JEE • CHEMISTRY • BIOMOLECULES

Biomolecules practice · Mixed difficulty

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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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151 Medium

151 of 315

Remembering +4 | -1

Chromosomes are made from

View answer and explanation

Correct option: D

carbohydrates and nucleic acids

Option C (proteins and nucleic acids) is correct because chromosomes are composed of DNA (a nucleic acid) tightly coiled around proteins called histones.

152 Medium

152 of 315

Understanding +4 | -1

Which of the following is/are the application(s) of the DNA fingerprinting?

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because DNA fingerprinting has applications in forensic science, paternity testing, and identifying racial groups for evolutionary studies.

153 Medium

153 of 315

Understanding +4 | -1

Which of the following statements are correct about globular proteins?

(a) Globular proteins are usually soluble in water

(b) In these proteins, chains of polypeptides coil around each other to give a spherical shape

(c) Insulin is an example of globular protein

(d) Albumin is an example of globular protein

View answer and explanation

Correct option: B

a, b ,c are correct

Option B (a, b, c are correct) is correct because globular proteins are generally water-soluble, have a spherical shape due to polypeptide chains coiling around each other, and insulin is a globular protein.

154 Easy

154 of 315

Remembering +4 | -1

An example of disaccharide made up of two units of the same monosaccharides is:

View answer and explanation

Correct option: A

maltose

Option B (Maltose) is correct because maltose is a disaccharide composed of two glucose units.

155 Medium

155 of 315

Remembering +4 | -1

Structurally, the cellulose is a linear polymer of

View answer and explanation

Correct option: B

\beta

-D-glucose molecules

Option B (

\beta

-D-glucose molecules) is correct because cellulose is a linear polymer made of

\beta

-D-glucose units linked by

\beta

-1,4-glycosidic bonds.

156 Easy

156 of 315

Remembering +4 | -1

Cell membranes are mainly compose of :

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Correct option: A

Phospholipids

Option A (Phospholipids) is correct because cell membranes are primarily composed of a phospholipid bilayer, which provides the structural basis for the membrane.

157 Medium

157 of 315

Understanding +4 | -1

In the acetylation of glucose, which group is involved in the reaction

View answer and explanation

Correct option: C

alcoholic

\mathrm{OH}

group

Option C (alcoholic OH group) is correct because acetylation involves the reaction of acetic anhydride with the hydroxyl groups of glucose.

158 Medium

158 of 315

Remembering +4 | -1

Secondary structure of protein is mainly governed by

View answer and explanation

Correct option: A

hydrogen bonds

Option A (hydrogen bonds) is correct because the secondary structure of proteins, such as alpha-helices and beta-sheets, is primarily stabilized by hydrogen bonds between amino acid residues.

159 Medium

159 of 315

Analyzing +4 | -1

Identify the correct series of biomolecules which do not belong to the given category

- Homopolymer

- Secondary metabolite

- Neutral Aminoacid

- Aromatic aminoacid

Options:

View answer and explanation

Correct option: A

Insulin, Rubber, Valine, Tryptophan

Option A (Insulin, Rubber, Valine, Tryptophan) is correct because Insulin is a homopolymer, Rubber is a secondary metabolite, Valine is a neutral amino acid, and Tryptophan is an aromatic amino acid.

160 Easy

160 of 315

Remembering +4 | -1

The carbohydrate which serves as reserve glucose in body is:

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Correct option: C

Glycogen

Option C (Glycogen) is correct because glycogen is the storage form of glucose in animals, analogous to starch in plants.

161 Medium

161 of 315

Remembering +4 | -1

Proteins can be classified into two types on the basis of their molecular shape i.e. fibrous proteins and globular proteins. Examples of fibrous proteins are

I. insulin

II. keratin

III. albumin

IV. myosin

Select the correct option.

View answer and explanation

Correct option: B

II and IV

Option B (II and IV) is correct because Keratin (hair, wool) and Myosin (muscles) are examples of fibrous proteins, while Insulin and Albumin are globular proteins.

162 Medium

162 of 315

Analyzing +4 | -1

Assertion:- Glucose reacts with

\mathrm{Br}_2

to forms accharic acid.

Reason:- Acid will be formed by oxidation of alcohol with

\mathrm{Br}_2

View answer and explanation

Correct option: D

If both assertion & reason are false

Option D is correct because both the assertion and reason are false. Glucose reacts with Br2 to form gluconic acid, not saccharic acid, and Br2 oxidizes the aldehyde group, not the alcohol group.

163 Easy

163 of 315

Remembering +4 | -1

Lipids are:

View answer and explanation

Correct option: A

Long chain fatty acid esters

Option A is correct because lipids are esters of long-chain fatty acids with glycerol or other alcohols.

164 Medium

164 of 315

Remembering +4 | -1

A saturated fatty acid found in oils and fats is:

View answer and explanation

Correct option: A

Palmitic acid

Option A (Palmitic acid) is correct because palmitic acid (

\mathrm{C}_{15}\mathrm{H}_{31}\mathrm{COOH}

) is a saturated fatty acid commonly found in oils and fats.

165 Medium

165 of 315

Remembering +4 | -1

The mineral elements required for carbohydrate translocation, photoysis of water and for chlorophyll synthesis are respectively

View answer and explanation

Correct option: A

Boron, Manganese, Zinc

Option B (Boron, chlorine, Iron) is the correct answer. Boron is required for carbohydrate translocation, chlorine for photolysis of water, and iron for chlorophyll synthesis.

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166 Easy

166 of 315

Remembering +4 | -1

The number of amino acids in insulin is

View answer and explanation

Correct option: C

Option C (51) is correct because insulin consists of two polypeptide chains containing 21 and 30 amino acids, totaling 51.

167 Medium

167 of 315

Remembering +4 | -1

The number of disulphide linkage present in insulin are

View answer and explanation

Correct option: B

Option C (3) is correct because there are 3 disulfide linkages present in insulin.

168 Easy

168 of 315

Remembering +4 | -1

Type of amino acids obtained by hydrolysis of proteins is :

View answer and explanation

Correct option: D

\alpha

Option D (

\alpha

) is correct because proteins are hydrolyzed into alpha-amino acids.

169 Easy

169 of 315

Remembering +4 | -1

Which of the following is not a pyrimidine base?

View answer and explanation

Correct option: B

Guanine

Option B (Guanine) is correct because Guanine is a purine base, while Thymine, Cytosine, and Uracil are pyrimidine bases.

170 Easy

170 of 315

Remembering +4 | -1

Rice is deficient in

View answer and explanation

Correct option: A

Lysine

Option A is correct because rice is known to be deficient in the essential amino acid lysine.

171 Easy

171 of 315

Remembering +4 | -1

Adenosine is an example of:

View answer and explanation

Correct option: B

Nucleoside

Option B (Nucleoside) is correct because adenosine is composed of a ribose sugar and an adenine base, which defines it as a nucleoside.

172 Easy

172 of 315

Remembering +4 | -1

Monosaccharides usually contain:

View answer and explanation

Correct option: A

3 to 8 carbon atoms

Option A (3 to 8 carbon atoms) is correct because monosaccharides typically contain 3 to 8 carbon atoms, with examples including trioses (3C), tetroses (4C), pentoses (5C), hexoses (6C), heptoses (7C), and octoses (8C).

173 Medium

173 of 315

Understanding +4 | -1

Which pair of compound will be show mutarotation?

View answer and explanation

Correct option: A

Glucose, Fructose

Option A (Glucose, Fructose) is correct because both glucose and fructose exist in cyclic hemiacetal/hemiketal forms that can interconvert, leading to a change in optical rotation.

174 Easy

174 of 315

Remembering +4 | -1

DNA has deoxyribose, base and the third compound is:

View answer and explanation

Correct option: A

Phosphoric acid

Option A (Phosphoric acid) is correct because DNA is composed of deoxyribose sugar, a nitrogenous base, and a phosphate group (phosphoric acid).

175 Easy

175 of 315

Remembering +4 | -1

Ribose sugar is a component of:

View answer and explanation

Correct option: B

RNA

The correct answer is B (RNA) because ribose sugar is a fundamental component of ribonucleic acid (RNA).

176 Medium

176 of 315

Remembering +4 | -1

The number of hydrogen bonds present between guanine and cytosine are:

View answer and explanation

Correct option: B

Option B (3) is correct because guanine and cytosine are connected by three hydrogen bonds in DNA.

177 Medium

177 of 315

Remembering +4 | -1

Degree of unsaturation in oils and fats is measured in terms of:

View answer and explanation

Correct option: B

Iodine value

Option B (Iodine value) is correct because the iodine value is a measure of the degree of unsaturation (number of double bonds) in oils and fats.

178 Medium

178 of 315

Understanding +4 | -1

During reduction of sugar through fehling's solution, ionic state of metal changes from

View answer and explanation

Correct option: D

\mathrm{Cu}^{+2}

\mathrm{Cu}^{+1}

Option D (

\mathrm{Cu}^{+2}

\mathrm{Cu}^{+1}

) is correct because during the reduction of sugar by Fehling's solution,

\mathrm{Cu}^{+2}

ions are reduced to

\mathrm{Cu}^{+1}

ions.

179 Medium

179 of 315

Remembering +4 | -1

Which of the following is polymerized to form proteins?

View answer and explanation

Correct option: C

Amino acid

Option C (Amino acid) is correct because proteins are polymers made up of amino acid monomers linked together by peptide bonds.

180 Medium

180 of 315

Remembering +4 | -1

The enzyme which decomposes urea into ammonia and carbon dioxide is called

View answer and explanation

Correct option: B

Urease

Option B (Urease) is correct because urease is the enzyme that specifically catalyzes the decomposition of urea into ammonia and carbon dioxide.

Revision notes and key takeaways

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