50+ JEE Mains MCQ Questions Biomolecules with Solutions

Preparing for the Joint Entrance Exam (JEE) can be a daunting task. With so many subjects to cover and so many topics to study, it can be challenging to know where to start. One essential topic in the JEE Mains syllabus is the Biomolecules. In this article, we will provide 50+ MCQ questions on the Biomolecules, along with detailed solutions to help you prepare for the JEE Mains exam.

These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Biomolecules JEE Mains MCQ Questions with Answers.

Biomolecules JEE Mains MCQ

Which of the following is a reducing sugar?
a) Glucose
b) Sucrose
c) Lactose
d) Starch

Answer: a) Glucose Explanation: Glucose is a reducing sugar because it can reduce other substances by donating electrons in a redox reaction.

Which of the following biomolecules is classified as a lipid?
a) Glucose
b) Glycogen
c) Triglyceride
d) Hemoglobin

Answer: c) Triglyceride Explanation: Triglycerides are a type of lipid composed of glycerol and three fatty acid chains.

Which of the following is a structural protein?
a) Insulin
b) Hemoglobin
c) Collagen
d) Amylase

Answer: c) Collagen Explanation: Collagen is a structural protein that provides strength and support to connective tissues in the body.

Nucleic acids are composed of monomers known as:
a) Monosaccharides
b) Amino acids
c) Nucleotides
d) Fatty acids

Answer: c) Nucleotides Explanation: Nucleic acids, such as DNA and RNA, are composed of nucleotide monomers, which consist of a sugar, a phosphate group, and a nitrogenous base.

Enzymes are examples of:
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic acids

Answer: c) Proteins Explanation: Enzymes are biological catalysts that facilitate biochemical reactions in the body. They are protein molecules with specific three-dimensional structures.


Which of the following is a storage polysaccharide in plants?
a) Cellulose
b) Starch
c) Glycogen
d) Chitin

Answer: b) Starch Explanation: Starch is the storage polysaccharide in plants, while glycogen is the storage polysaccharide in animals.

Which of the following is an example of a disaccharide?
a) Glucose
b) Fructose
c) Sucrose
d) Maltose

Answer: c) Sucrose Explanation: Sucrose is a disaccharide composed of glucose and fructose units.

Which of the following nucleotides is found in RNA but not in DNA?
a) Adenine
b) Guanine
c) Cytosine
d) Uracil

Answer: d) Uracil Explanation: Uracil is found in RNA as one of the four nucleotide bases, whereas DNA contains thymine instead of uracil.

Which of the following is a function of lipids in the human body?
a) Energy storage
b) Structure and support
c) Enzyme catalysis
d) Antibody production

Answer: a) Energy storage Explanation: Lipids serve as a long-term energy storage molecule in the human body.

Which of the following is an essential amino acid?
a) Alanine
b) Aspartic acid
c) Histidine
d) Serine

Answer: c) Histidine Explanation: Histidine is an essential amino acid, meaning it cannot be synthesized by the body and must be obtained from the diet.


Which of the following is a disaccharide composed of glucose and galactose units?
a) Maltose
b) Sucrose
c) Lactose
d) Cellulose

Answer: c) Lactose Explanation: Lactose is a disaccharide composed of one glucose molecule and one galactose molecule.

Which of the following is a structural polysaccharide found in the exoskeleton of insects and the cell walls of fungi?
a) Starch
b) Glycogen
c) Cellulose
d) Chitin

Answer: d) Chitin Explanation: Chitin is a structural polysaccharide made up of repeating units of N-acetylglucosamine. It provides rigidity and support to the exoskeleton of insects and the cell walls of fungi.

Which of the following is not a function of proteins in living organisms?
a) Enzymatic catalysis
b) Cell communication
c) Transport of oxygen
d) Energy storage

Answer: d) Energy storage Explanation: Proteins have various functions in living organisms, including enzymatic catalysis, cell communication, and transport of oxygen. However, they are not primarily used for energy storage.

Which of the following nucleotides is not present in DNA?
a) Adenine
b) Guanine
c) Uracil
d) Thymine

Answer: c) Uracil Explanation: Uracil is a nitrogenous base found in RNA, while DNA contains thymine instead of uracil.

Which of the following is an example of a globular protein?
a) Collagen
b) Hemoglobin
c) Keratin
d) Elastin

Answer: b) Hemoglobin Explanation: Hemoglobin is a globular protein that functions in the transport of oxygen in red blood cells.


Which of the following is a polysaccharide?
a) Glucose
b) Fructose
c) Starch
d) Sucrose

Answer: c) Starch Explanation: Starch is a polysaccharide composed of multiple glucose units linked together. It serves as a storage form of glucose in plants.

Which of the following is a major component of cell membranes?
a) Lipids
b) Proteins
c) Carbohydrates
d) Nucleic acids

Answer: a) Lipids Explanation: Lipids, particularly phospholipids, are the major components of cell membranes. They form a lipid bilayer that provides structural integrity and regulates the movement of substances in and out of the cell.

Which of the following is an example of a nucleoside?
a) Adenosine
b) Guanine
c) Thymine
d) Cytosine

Answer: a) Adenosine Explanation: Adenosine is a nucleoside composed of adenine and ribose. It is a component of nucleic acids and also serves as a signaling molecule in various cellular processes.

Which of the following is an essential fatty acid?
a) Linoleic acid
b) Palmitic acid
c) Stearic acid
d) Oleic acid

Answer: a) Linoleic acid Explanation: Linoleic acid is an essential fatty acid that cannot be synthesized by the human body and must be obtained from the diet. It plays a crucial role in cell membrane structure and various physiological processes.

Which of the following is a function of enzymes in biological systems?
a) Energy storage
b) Cell communication
c) Catalysis of chemical reactions
d) Transport of molecules

Answer: c) Catalysis of chemical reactions Explanation: Enzymes are proteins that act as biological catalysts, facilitating chemical reactions in living organisms. They accelerate the rates of specific reactions by lowering the activation energy required for the reaction to occur.


Which of the following is an example of a non-reducing sugar?
a) Glucose
b) Fructose
c) Maltose
d) Lactose

Answer: c) Maltose

The process of converting glucose into ethanol and carbon dioxide is called:
a) Fermentation
b) Photosynthesis
c) Respiration
d) Oxidative phosphorylation

Answer: a) Fermentation

Which of the following is an example of a nucleotide found in DNA?
a) Adenine
b) Uracil
c) Thymine
d) Cytosine

Answer: c) Thymine

The enzyme responsible for DNA replication is called:
a) DNA polymerase
b) RNA polymerase
c) Helicase
d) Ligase

Answer: a) DNA polymerase

Which of the following is an example of a globular protein?
a) Collagen
b) Hemoglobin
c) Keratin
d) Elastin

Answer: c) Photosynthesis

The process of converting light energy into chemical energy in plants is called:
a) Respiration
b) Fermentation
c) Photosynthesis
d) Glycolysis

Answer: c) Photosynthesis

The sugar present in RNA is:
a) Ribose
b) Deoxyribose
c) Glucose
d) Fructose

Answer: a) Ribose

Which of the following is an example of a disaccharide?
a) Glucose
b) Fructose
c) Maltose
d) Starch

Answer: c) Maltose

The process of converting amino acids into glucose is called:
a) Glycolysis
b) Gluconeogenesis
c) Krebs cycle
d) Oxidative phosphorylation

Answer: b) Gluconeogenesis

Which of the following is an example of a structural polysaccharide?
a) Glucose
b) Sucrose
c) Cellulose
d) Lactose

Answer: c) Cellulose

We hope there JEE MCQ of Class 12 Biomolecules will help you to score an excellent rank in JEE Mains and Advanced. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.

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Sneha

Master's in Biology, Skilled in vocational training. Strong Analytical and creative knowledge.

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