Biomolecules
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Carbohydrates (Classification and Structure)
SubtopicCarbohydrates (Classification and Structure) under Biomolecules for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Starch produces a characteristic intense blue color when reacted with which reagent?
A.Benedict's solution
B.Iodine solution
C.Fehling's solution
D.Schiff's reagent
- 2.
Plant cell walls are predominantly composed of which structural polysaccharide?
A.Starch
B.Glycogen
C.Cellulose
D.Amylose
- 3.
Which monosaccharide is the primary sugar found in the human bloodstream?
A.Fructose
B.Galactose
C.Glucose
D.Ribose
Download the worksheet for Biomolecules - Carbohydrates (Classification and Structure) to practice offline. It includes additional chapter-level practice questions.
Proteins (Amino Acids and Peptide Bond)
SubtopicProteins (Amino Acids and Peptide Bond) under Biomolecules for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Which of the following amino acids has a thiol () functional group?
A.Alanine
B.Methionine
C.Cysteine
D.Serine
- 2.
What occurs when a protein is completely hydrolyzed?
A.The peptide bonds remain intact
B.The peptide bonds are broken
C.New peptide bonds are formed
D.The primary structure is preserved
- 3.
Amino acids are known as the building blocks of:
A.Carbohydrates
B.Vitamins
C.Proteins
D.Lipids
Download the worksheet for Biomolecules - Proteins (Amino Acids and Peptide Bond) to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
The activity of an enzyme is most sensitive to changes in which two factors?
A.Pressure and volume
B.Temperature and pH
C.Color and density
D.Mass and weight
- 2.
Enzymes belong to which broad class of biological macromolecules?
A.Lipids
B.Proteins
C.Carbohydrates
D.Nucleic acids
- 3.
Which enzyme catalyzes the hydrolysis of sucrose to produce an equimolar mixture of glucose and fructose?
A.Maltase
B.Sucrase
C.Lactase
D.Cellulase
Download the worksheet for Biomolecules - Enzymes to practice offline. It includes additional chapter-level practice questions.
Vitamins (Classification and Functions)
SubtopicVitamins (Classification and Functions) under Biomolecules for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Which vitamin is essential for maintaining the health of the epithelial tissues and vision?
A.Vitamin B12
B.Vitamin A
C.Vitamin C
D.Vitamin D
- 2.
Which of the following is a fat-soluble vitamin stored specifically in the liver?
A.Vitamin B1
B.Vitamin C
C.Vitamin A
D.Vitamin B6
- 3.
A lack of which vitamin in the diet can cause digestive disorders and a burning sensation in the skin?
A.Vitamin B2
B.Vitamin K
C.Vitamin A
D.Vitamin E
Download the worksheet for Biomolecules - Vitamins (Classification and Functions) to practice offline. It includes additional chapter-level practice questions.
Nucleic Acids (DNA and RNA)
SubtopicNucleic Acids (DNA and RNA) under Biomolecules for Grade 12 CBSE.
Preview questions (no answers)
- 1.
In the structure of nucleic acids, the backbone is formed by alternating:
A.Sugar and Base
B.Base and Phosphate
C.Sugar and Phosphate
D.Base and Base
- 2.
Which of the following is NOT a constituent of DNA?
A.Phosphate
B.Ribose
C.Adenine
D.Cytosine
- 3.
The monomeric unit of RNA is called a:
A.Deoxyribonucleoside
B.Ribonucleotide
C.Deoxyribonucleotide
D.Ribonucleoside
Download the worksheet for Biomolecules - Nucleic Acids (DNA and RNA) to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which hormone is primarily involved in the regulation of the sleep-wake cycle and circadian rhythms?
A.Melatonin
B.Thyroxine
C.Insulin
D.Oxytocin
- 2.
What happens to most hormones after they have completed their specific task?
A.They are recycled by the gland
B.They are inactivated and excreted
C.They are stored in the liver
D.They become vitamins
- 3.
Which gland is often described as having an H-shape or butterfly shape and is located in the neck?
A.Pituitary gland
B.Adrenal gland
C.Thyroid gland
D.Pancreas
Download the worksheet for Biomolecules - Hormones to practice offline. It includes additional chapter-level practice questions.