krit.club logo

Biomolecules

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Carbohydrates (Classification and Structure)

Subtopic

Carbohydrates (Classification and Structure) under Biomolecules for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following monosaccharides is classified as a ketohexose?

    A.

    Ribose

    B.

    Glucose

    C.

    Galactose

    D.

    Fructose

  2. 2.

    The general formula for most carbohydrates is Cx(H2O)yC_x(H_2O)_y. Which of the following compounds fits this formula but is not a carbohydrate?

    A.

    Acetic acid (CH3COOHCH_3COOH)

    B.

    Glucose (C6H12O6C_6H_{12}O_6)

    C.

    Fructose (C6H12O6C_6H_{12}O_6)

    D.

    Sucrose (C12H22O11C_{12}H_{22}O_{11})

  3. 3.

    Identify the type of carbohydrate labeled as 'F' in the following classification chart:

    A.

    Monosaccharides

    B.

    Disaccharides

    C.

    Polysaccharides

    D.

    Oligosaccharides

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)

Subtopic

Proteins (Amino Acids and Peptide Bond) under Biomolecules for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In its Zwitterionic form, an amino acid molecule contains which of the following?

    A.

    Only a negative charge on the carboxylate group

    B.

    Only a positive charge on the ammonium group

    C.

    Both a positive and a negative charge on the same molecule

    D.

    No net charge due to the absence of ionized groups

  2. 2.

    The chemical linkage that joins two amino acids together in a protein chain is known as a:

    A.

    Glycosidic linkage

    B.

    Phosphodiester linkage

    C.

    Hydrogen bond

    D.

    Peptide linkage

  3. 3.

    Which of the following amino acids is classified as a non-essential amino acid in the human diet?

    A.

    Valine

    B.

    Leucine

    C.

    Alanine

    D.

    Lysine

Download the worksheet for Biomolecules - Proteins (Amino Acids and Peptide Bond) to practice offline. It includes additional chapter-level practice questions.

Enzymes

Subtopic

Enzymes under Biomolecules for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following enzymes catalyzes the conversion of starch into maltose?

    A.

    Pepsin

    B.

    Zymase

    C.

    Urease

    D.

    Diastase

  2. 2.

    The protein part of a conjugated enzyme, which is inactive without its co-factor, is known as a/an:

    A.

    Apoenzyme

    B.

    Co-enzyme

    C.

    Holoenzyme

    D.

    Prosthetic group

  3. 3.

    Which enzyme is responsible for the hydrolysis of maltose into two molecules of glucose?

    A.

    Zymase

    B.

    Invertase

    C.

    Maltase

    D.

    Urease

Download the worksheet for Biomolecules - Enzymes to practice offline. It includes additional chapter-level practice questions.

Vitamins (Classification and Functions)

Subtopic

Vitamins (Classification and Functions) under Biomolecules for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Deficiency of Vitamin A in the human body leads to a condition known as:

    A.

    Xerophthalmia

    B.

    Cheilosis

    C.

    Pernicious anaemia

    D.

    Scurvy

  2. 2.

    The vitamin that is synthesized in our skin in the presence of sunlight is:

    A.

    Vitamin A

    B.

    Vitamin B

    C.

    Vitamin C

    D.

    Vitamin D

  3. 3.

    Which of these vitamins is classified as fat-soluble?

    A.

    Vitamin B1B_{1}

    B.

    Vitamin B6B_{6}

    C.

    Vitamin C

    D.

    Vitamin K

Download the worksheet for Biomolecules - Vitamins (Classification and Functions) to practice offline. It includes additional chapter-level practice questions.

Nucleic Acids (DNA and RNA)

Subtopic

Nucleic Acids (DNA and RNA) under Biomolecules for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    According to Watson and Crick's model of DNA, how many hydrogen bonds are formed between Cytosine and Guanine?

    A.

    One

    B.

    Two

    C.

    Three

    D.

    Four

  2. 2.

    Which of the following nitrogenous bases is found only in RNA and not in DNA?

    A.

    Adenine

    B.

    Guanine

    C.

    Thymine

    D.

    Uracil

  3. 3.

    In the structural organization of nucleic acids, what does the following flowchart represent regarding the components of a nucleotide?

    A.

    The process of DNA replication

    B.

    The chemical composition of a nucleotide

    C.

    The formation of a polypeptide chain

    D.

    The hydrolysis of a protein

Download the worksheet for Biomolecules - Nucleic Acids (DNA and RNA) to practice offline. It includes additional chapter-level practice questions.

Hormones

Subtopic

Hormones under Biomolecules for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following hormones is known as the 'fight or flight' hormone, preparing the body for emergency situations?

    A.

    Thyroxine

    B.

    Oxytocin

    C.

    Adrenaline

    D.

    Progesterone

  2. 2.

    The deficiency of which hormone in the human body leads to the condition known as Diabetes mellitus?

    A.

    Estrogen

    B.

    Insulin

    C.

    Testosterone

    D.

    Adrenaline

  3. 3.

    Which hormone is secreted by the pancreas to help lower blood glucose levels?

    A.

    Adrenaline

    B.

    Thyroxine

    C.

    Insulin

    D.

    Glucagon

Download the worksheet for Biomolecules - Hormones to practice offline. It includes additional chapter-level practice questions.