Class 12 Chemistry Chapter 10 Biomolecules MCQs Updated 2024

Q.1: Which of the following monosaccharides is a component of RNA?
(a) Glucose
(b) Ribose
(c) Fructose
(d) Galactose

Answer: (b) Ribose
Explanation: Ribose is the pentose sugar present in RNA.

Q.2: Which of the following is a reducing sugar?
(a) Sucrose
(b) Glucose
(c) Starch
(d) Cellulose

Answer: (b) Glucose
Explanation: Glucose is a reducing sugar because it has a free aldehyde group.

Q.3: Which of the following is not a polysaccharide?
(a) Starch
(b) Glycogen
(c) Cellulose
(d) Maltose

Answer: (d) Maltose
Explanation: Maltose is a disaccharide, not a polysaccharide.

Q.4: What is the main storage form of carbohydrates in animals?
(a) Starch
(b) Cellulose
(c) Glycogen
(d) Glucose

Answer: (c) Glycogen
Explanation: Glycogen is the main storage form of carbohydrates in animals.

Q.5: Which of the following amino acids is not essential?
(a) Lysine
(b) Valine
(c) Glycine
(d) Methionine

Answer: (c) Glycine
Explanation: Glycine is not an essential amino acid as it can be synthesized by the body.

Q.6: Which of the following vitamins is water-soluble?
(a) Vitamin A
(b) Vitamin D
(c) Vitamin E
(d) Vitamin C

Answer: (d) Vitamin C
Explanation: Vitamin C is water-soluble.

Q.7: Which of the following is not a protein?
(a) Insulin
(b) Hemoglobin
(c) Cellulose
(d) Keratin

Answer: (c) Cellulose
Explanation: Cellulose is a polysaccharide, not a protein.

Q.8: Which of the following bases is found in RNA but not in DNA?
(a) Adenine
(b) Guanine
(c) Uracil
(d) Thymine

Answer: (c) Uracil
Explanation: Uracil is found in RNA instead of thymine, which is found in DNA.

Q.9: Which of the following bonds connects amino acids in a protein?
(a) Glycosidic bond
(b) Peptide bond
(c) Phosphodiester bond
(d) Hydrogen bond

Answer: (b) Peptide bond
Explanation: Peptide bonds connect amino acids in a protein.

Q.10: Which of the following vitamins is involved in blood clotting?
(a) Vitamin A
(b) Vitamin B₁₂
(c) Vitamin K
(d) Vitamin D

Answer: (c) Vitamin K
Explanation: Vitamin K is essential for the synthesis of clotting factors.

Q.11: Which of the following is a disaccharide?
(a) Glucose
(b) Fructose
(c) Lactose
(d) Galactose

Answer: (c) Lactose
Explanation: Lactose is a disaccharide made up of glucose and galactose.

Q.12: Which of the following is a primary structure of a protein?
(a) Alpha-helix
(b) Beta-sheet
(c) Amino acid sequence
(d) Tertiary structure

Answer: (c) Amino acid sequence
Explanation: The primary structure of a protein is its amino acid sequence.

Q.13: Which of the following is not a lipid?
(a) Cholesterol
(b) Triglyceride
(c) Phospholipid
(d) Cellulose

Answer: (d) Cellulose
Explanation: Cellulose is a carbohydrate, not a lipid.

Q.14: Which of the following is the function of enzymes in biochemical reactions?
(a) Increase activation energy
(b) Decrease activation energy
(c) Provide energy
(d) None of the above

Answer: (b) Decrease activation energy
Explanation: Enzymes act as catalysts by lowering the activation energy of biochemical reactions.

Q.15: Which of the following is an example of a globular protein?
(a) Collagen
(b) Keratin
(c) Hemoglobin
(d) Fibroin

Answer: (c) Hemoglobin
Explanation: Hemoglobin is a globular protein involved in oxygen transport.

Q.16: Which of the following is the storage form of carbohydrates in plants?
(a) Glycogen
(b) Cellulose
(c) Starch
(d) Glucose

Answer: (c) Starch
Explanation: Starch is the storage form of carbohydrates in plants.

Q.17: Which of the following is a fat-soluble vitamin?
(a) Vitamin C
(b) Vitamin B₁₂
(c) Vitamin A
(d) Vitamin B₆

Answer: (c) Vitamin A
Explanation: Vitamin A is a fat-soluble vitamin.

Q.18: Which of the following enzymes is involved in the digestion of proteins?
(a) Amylase
(b) Lipase
(c) Pepsin
(d) Maltase

Answer: (c) Pepsin
Explanation: Pepsin is an enzyme that breaks down proteins in the stomach.

Q.19: Which of the following is the monomer unit of nucleic acids?
(a) Amino acids
(b) Nucleotides
(c) Monosaccharides
(d) Fatty acids

Answer: (b) Nucleotides
Explanation: Nucleotides are the monomer units of nucleic acids.

Q.20: Which of the following carbohydrates cannot be digested by humans?
(a) Starch
(b) Glycogen
(c) Cellulose
(d) Sucrose

Answer: (c) Cellulose
Explanation: Humans lack the enzyme to digest cellulose.

Q.21: Which of the following amino acids contains sulfur?
(a) Valine
(b) Cysteine
(c) Leucine
(d) Phenylalanine

Answer: (b) Cysteine
Explanation: Cysteine contains a thiol (sulfur-containing) group.

Q.22: Which of the following is a water-soluble vitamin?
(a) Vitamin D
(b) Vitamin K
(c) Vitamin C
(d) Vitamin E

Answer: (c) Vitamin C
Explanation: Vitamin C is water-soluble.

Q.23: Which of the following is the main function of hemoglobin?
(a) Enzyme activity
(b) Oxygen transport
(c) Structural support
(d) Hormone regulation

Answer: (b) Oxygen transport
Explanation: Hemoglobin is responsible for transporting oxygen in the blood.

Q.24: Which of the following carbohydrates is found in milk?
(a) Glucose
(b) Lactose
(c) Fructose
(d) Sucrose

Answer: (b) Lactose
Explanation: Lactose is the disaccharide found in milk.

Q.25: Which of the following is the major structural component of the cell wall in plants?
(a) Cellulose
(b) Starch
(c) Glycogen
(d) Chitin

Answer: (a) Cellulose
Explanation: Cellulose is the major structural component of the plant cell wall.

Q.26: Which of the following is an essential fatty acid?
(a) Oleic acid
(b) Linoleic acid
(c) Palmitic acid
(d) Stearic acid

Answer: (b) Linoleic acid
Explanation: Linoleic acid is an essential fatty acid that must be obtained from the diet.

Q.27: Which of the following nucleotides is found in DNA but not in RNA?
(a) Adenine
(b) Cytosine
(c) Thymine
(d) Uracil

Answer: (c) Thymine
Explanation: Thymine is found in DNA but is replaced by uracil in RNA.

Q.28: Which of the following is the function of bile salts in digestion?
(a) Protein digestion
(b) Carbohydrate digestion
(c) Lipid emulsification
(d) Nucleic acid digestion

Answer: (c) Lipid emulsification
Explanation: Bile salts emulsify lipids, making them easier to digest.

Q.29: Which of the following enzymes breaks down starch into maltose?
(a) Amylase
(b) Lipase
(c) Pepsin
(d) Trypsin

Answer: (a) Amylase
Explanation: Amylase breaks down starch into maltose.

Q.30: Which of the following is the main storage form of lipids in the body?
(a) Phospholipids
(b) Steroids
(c) Triglycerides
(d) Waxes

Answer: (c) Triglycerides
Explanation: Triglycerides are the main storage form of lipids in the body.

Q.31: Which of the following amino acids is aromatic?
(a) Valine
(b) Alanine
(c) Tyrosine
(d) Glycine

Answer: (c) Tyrosine
Explanation: Tyrosine is an aromatic amino acid.

Q.32: Which of the following is the monomer unit of cellulose?
(a) Fructose
(b) Glucose
(c) Galactose
(d) Ribose

Answer: (b) Glucose
Explanation: Cellulose is composed of glucose monomers.

Q.33: Which of the following is a ketose sugar?
(a) Glucose
(b) Fructose
(c) Galactose
(d) Ribose

Answer: (b) Fructose
Explanation: Fructose is a ketose sugar with a keto group.

Q.34: Which of the following is a storage form of glucose in animals?
(a) Starch
(b) Cellulose
(c) Glycogen
(d) Chitin

Answer: (c) Glycogen
Explanation: Glycogen is the storage form of glucose in animals.

Q.35: Which of the following vitamins is required for the synthesis of collagen?
(a) Vitamin A
(b) Vitamin B₆
(c) Vitamin C
(d) Vitamin D

Answer: (c) Vitamin C
Explanation: Vitamin C is required for the synthesis of collagen.

Q.36: Which of the following is a pentose sugar found in nucleotides?
(a) Glucose
(b) Fructose
(c) Ribose
(d) Galactose

Answer: (c) Ribose
Explanation: Ribose is a pentose sugar found in RNA nucleotides.

Q.37: Which of the following lipids is a major component of cell membranes?
(a) Triglycerides
(b) Steroids
(c) Phospholipids
(d) Waxes

Answer: (c) Phospholipids
Explanation: Phospholipids are a major component of cell membranes.

Q.38: Which of the following is a non-reducing sugar?
(a) Glucose
(b) Maltose
(c) Lactose
(d) Sucrose

Answer: (d) Sucrose
Explanation: Sucrose is a non-reducing sugar because it does not have a free aldehyde or keto group.

Q.39: Which of the following is the major nitrogenous waste product in humans?
(a) Urea
(b) Ammonia
(c) Uric acid
(d) Creatinine

Answer: (a) Urea
Explanation: Urea is the major nitrogenous waste product excreted by humans.

Q.40: Which of the following nucleotides pairs with adenine in DNA?
(a) Thymine
(b) Cytosine
(c) Guanine
(d) Uracil

Answer: (a) Thymine
Explanation: Thymine pairs with adenine in DNA.

Q.41: Which of the following is a coenzyme?
(a) NAD+
(b) ATP
(c) ADP
(d) FAD

Answer: (a) NAD+
Explanation: NAD+ is a coenzyme involved in redox reactions.

Q.42: Which of the following vitamins is synthesized by the skin upon exposure to sunlight?
(a) Vitamin A
(b) Vitamin B₆
(c) Vitamin D
(d) Vitamin K

Answer: (c) Vitamin D
Explanation: Vitamin D is synthesized by the skin upon exposure to sunlight.

Q.43: Which of the following is a primary structure of protein?
(a) Alpha-helix
(b) Beta-sheet
(c) Amino acid sequence
(d) Quaternary structure

Answer: (c) Amino acid sequence
Explanation: The primary structure of a protein is its amino acid sequence.

Q.44: Which of the following is an antioxidant vitamin?
(a) Vitamin A
(b) Vitamin C
(c) Vitamin D
(d) Vitamin K

Answer: (b) Vitamin C
Explanation: Vitamin C acts as an antioxidant in the body.

Q.45: Which of the following is the storage form of glucose in plants?
(a) Glycogen
(b) Cellulose
(c) Starch
(d) Chitin

Answer: (c) Starch
Explanation: Starch is the storage form of glucose in plants.

Q.46: Which of the following is a fat-soluble vitamin?
(a) Vitamin B₁
(b) Vitamin B₆
(c) Vitamin C
(d) Vitamin E

Answer: (d) Vitamin E
Explanation: Vitamin E is a fat-soluble vitamin.

Q.47: Which of the following amino acids is essential?
(a) Glycine
(b) Valine
(c) Alanine
(d) Serine

Answer: (b) Valine
Explanation: Valine is an essential amino acid that must be obtained from the diet.

Q.48: Which of the following is a structural polysaccharide in plants?
(a) Starch
(b) Glycogen
(c) Cellulose
(d) Chitin

Answer: (c) Cellulose
Explanation: Cellulose is a structural polysaccharide in plant cell walls.

Q.49: Which of the following is a function of RNA?
(a) Genetic information storage
(b) Protein synthesis
(c) Lipid synthesis
(d) Carbohydrate metabolism

Answer: (b) Protein synthesis
Explanation: RNA is involved in protein synthesis as a messenger (mRNA), transfer (tRNA), and ribosomal (rRNA) RNA.

Q.50: Which of the following is an example of a fibrous protein?
(a) Hemoglobin
(b) Myoglobin
(c) Collagen
(d) Insulin

Answer: (c) Collagen
Explanation: Collagen is a fibrous protein that provides structural support.

15 thoughts on “Class 12 Chemistry Chapter 10 Biomolecules MCQs Updated 2024”

  1. Write more, thats all I have to say. Literally,
    it seems as though you relied on the video to make your point.
    You clearly know what youre talking about, why waste your intelligence on just posting videos to your
    blog when you could be giving us something informative to read?

  2. Hi there, just became aware of your blog through Google, and found that
    it’s truly informative. I am gonna watch out for brussels.
    I will appreciate if you continue this in future. Numerous people will be benefited from your writing.
    Cheers!

  3. I know this if off topic but I’m looking into starting my
    own weblog and was curious what all is needed to get set up?
    I’m assuming having a blog like yours would cost
    a pretty penny? I’m not very internet savvy so I’m not 100% sure.
    Any tips or advice would be greatly appreciated. Kudos

  4. Greetings! I know this is kinda off topic but I was wondering which blog platform are you
    using for this site? I’m getting tired of
    Wordpress because I’ve had issues with hackers and I’m looking
    at options for another platform. I would be awesome if
    you could point me in the direction of a good platform.

  5. Hi, There’s no doubt that your site might be having internet
    browser compatibility issues. When I take a look at your web site in Safari,
    it looks fine however when opening in Internet Explorer, it’s got some overlapping issues.
    I simply wanted to provide you with a quick
    heads up! Apart from that, wonderful website!

Leave a Comment

Your email address will not be published. Required fields are marked *

Shopping Basket
Scroll to Top