Match List I with List II :

	List I		List II
A.	Trypsin	I.	Intercellular ground substance
B.	Morphine	II.	Lectin
C.	Concanavalin A	III.	Enzyme
D.	Collagen	IV.	Alkaloid

Choose the correct answer from the options given below :

Related Formula

Purines: Adenine & Guanine Pyrimidines: Cytosine, Thymine, Uracil Lipids: Insoluble in water

Core Logic

• A: Lipids are insoluble in water (False).
• B: Proteins are polypeptides composed of amino acid chains (True).
• C: Polysaccharides are polymers of monosaccharide sugar units (True).
• D: Adenine and guanine are purines, not pyrimidines (False).
• E: Almost all enzymes are proteins (True, except ribozymes).

Step 1: Conclusion

Correct statements are B, C, and E only. This matches Option (2).

Pattern Recognition

Adenine and Guanine = Purines (D is False). Lipids = Water insoluble (A is False). Correct statements are B, C, E.

Chapter Mix

Class 11 Biology: Biomolecules

Related Formula

Protein Structures: Primary = Linear amino acid sequence Secondary = Alpha-helix and Beta-pleated sheet Tertiary = 3D folding Quaternary = Multi-polypeptide complex

Core Logic

The α$\alpha$-helix and β$\beta$-pleated sheet conformations represent the secondary level of protein structure, stabilized by hydrogen bonds along the polypeptide backbone.

Step 1: Selection

Alpha-helix is found in Secondary structure. Option (4) is correct.

Pattern Recognition

Alpha-helix / Beta-sheet = Secondary structure.

Chapter Mix

Class 11 Biology: Biomolecules

Related Formula

Amino Acid Classification: Substituted Methanes: Central alpha carbon with -H$-H$, -COOH$-COOH$, -NH₂$-NH_2$, -R$-R$ Acidic: Glutamic acid Basic: Lysine Neutral: Valine Aromatic: Tyrosine, Phenylalanine, Tryptophan Alcoholic: Serine

Core Logic

• Statement A: Amino acids are substituted methanes (True).
• Statement B: Serine is an alcoholic amino acid, not aromatic (False).
• Statement C: Valine is a neutral amino acid (True).
• Statement D: Lysine is a basic amino acid, not acidic (False).

Step 1: Conclusion

Statements A and C are correct. Option (3) is correct.

Pattern Recognition

Lysine = Basic (D false). Serine = Alcoholic, not aromatic (B false). Leaves A and C.

Chapter Mix

Class 11 Biology: Biomolecules

Related Formula

Core Logic

Lyases are enzymes that catalyze the removal of groups from substrates by mechanisms other than hydrolysis, leaving double bonds behind in the product.

Step 1: Evaluation of Other Classes

• Transferases: Catalyze transfer of a functional group between substrates.
• Isomerases: Catalyze inter-conversion of optical/geometric isomers.
• Ligases: Catalyze joining of two compounds using ATP energy.

Pattern Recognition

Sees: Chemical reaction showing removal of groups leaving C=C$C=C$ double bond. Shortcut: Lyases class of enzymes.

Chapter Mix

Class 11 Biology: Biomolecules