Class 11/Question Bank
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Questions on Biomolecules
The general formula for monosaccharides is: a) (CH₂O)n b) (C₂H₄O)n c) (CH₃O)n d) (C₂H₆O)n
Which of the following is NOT a monosaccharide? a) Glucose b) Fructose c) Sucrose d) Ribose
Sucrose is composed of: a) Glucose + Glucose b) Glucose + Fructose c) Glucose + Galactose d) Fructose + Galactose
The storage polysaccharide in plants is: a) Glycogen b) Cellulose c) Starch d) Chitin
Cellulose is found in: a) Animal cell walls b) Plant cell walls c) Fungal cell walls d) Bacterial cell walls
The number of amino acids commonly found in proteins is: a) 16 b) 18 c) 20 d) 22
Peptide bonds are formed between: a) Carbohydrates b) Amino acids c) Fatty acids d) Nucleotides
The primary structure of proteins refers to: a) 3D folding b) Linear sequence of amino acids c) Alpha helix formation d) Quaternary arrangement
Which structure is stabilized by hydrogen bonds? a) Primary structure b) Secondary structure c) Tertiary structure d) Quaternary structure
Hemoglobin is an example of: a) Primary structure b) Secondary structure c) Tertiary structure d) Quaternary structure
Lipids are: a) Water soluble b) Water insoluble c) Both water and oil soluble d) Neither water nor oil soluble
Triglycerides are composed of: a) Fatty acids only b) Glycerol only c) Fatty acids and glycerol d) Amino acids and glycerol
The major component of cell membranes is: a) Triglycerides b) Phospholipids c) Steroids d) Waxes
Cholesterol belongs to which class of lipids? a) Fats b) Oils c) Phospholipids d) Steroids
Enzymes are primarily: a) Carbohydrates b) Proteins c) Lipids d) Nucleic acids
The suffix commonly used for naming enzymes is: a) -ose b) -ase c) -ine d) -ide
Enzymes work by: a) Increasing activation energy b) Decreasing activation energy c) Providing energy d) Consuming energy
The enzyme-substrate complex is denoted as: a) E-S complex b) ES complex c) E+S complex d) Both a and b
Cofactors are: a) Protein constituents b) Non-protein constituents c) Carbohydrate constituents d) Lipid constituents
Which is NOT a factor affecting enzyme activity? a) Temperature b) pH c) Color d) Substrate concentration
Maltose is formed by: a) Glucose + Fructose b) Glucose + Galactose c) Glucose + Glucose d) Fructose + Galactose
Lactose is also known as: a) Cane sugar b) Milk sugar c) Malt sugar d) Fruit sugar
Glycogen is the storage polysaccharide in: a) Plants b) Animals c) Fungi d) Bacteria
Chitin is found in: a) Plant cell walls b) Animal bones c) Fungal cell walls and arthropod exoskeletons d) Bacterial cell walls
The R group in amino acids is: a) Always the same b) Variable c) Always acidic d) Always basic
Amino acids can be classified based on: a) Size of R group b) Nature of R group c) Color of R group d) Weight of R group
Alpha-helix is a type of: a) Primary structure b) Secondary structure c) Tertiary structure d) Quaternary structure
Beta-pleated sheet is stabilized by: a) Ionic bonds b) Hydrogen bonds c) Disulfide bridges d) Hydrophobic interactions
Disulfide bridges are found in: a) Primary structure b) Secondary structure c) Tertiary structure d) All structures
The four-ring structure is characteristic of: a) Triglycerides b) Phospholipids c) Steroids d) Waxes
Testosterone is an example of: a) Triglyceride b) Phospholipid c) Steroid hormone d) Wax
Estrogen is a: a) Protein hormone b) Steroid hormone c) Carbohydrate hormone d) Lipid hormone
Enzymes are classified into how many classes? a) 4 b) 5 c) 6 d) 7
Oxidoreductases are enzymes that: a) Transfer groups b) Catalyze oxidation-reduction c) Break bonds d) Form bonds
Hydrolases catalyze: a) Hydrolysis reactions b) Oxidation reactions c) Synthesis reactions d) Isomerization reactions
Prosthetic groups are: a) Loosely bound cofactors b) Tightly bound cofactors c) Enzyme inhibitors d) Enzyme activators
Secondary metabolites are: a) Essential for growth b) Essential for reproduction c) Not directly involved in normal growth d) Always toxic
Morphine is an example of: a) Alkaloid b) Terpenoid c) Essential oil d) Toxin
Abrin is a: a) Drug b) Toxin c) Essential oil d) Alkaloid
Rubber is a: a) Primary metabolite b) Secondary metabolite c) Enzyme d) Hormone
Ribose is a: a) Hexose b) Pentose c) Tetrose d) Heptose
Fructose is a: a) Aldose b) Ketose c) Triose d) Pentose
Galactose is a component of: a) Sucrose b) Maltose c) Lactose d) Cellulose
Glycosidic bonds are found in: a) Proteins b) Lipids c) Carbohydrates d) Nucleic acids
The carboxyl group in amino acids is: a) -NH₂ b) -COOH c) -OH d) -CH₃
The amino group in amino acids is: a) -NH₂ b) -COOH c) -OH d) -CH₃
Neutral amino acids have: a) Acidic R groups b) Basic R groups c) Neither acidic nor basic R groups d) Both acidic and basic R groups
Ionic bonds in proteins are formed between: a) Polar amino acids b) Nonpolar amino acids c) Charged amino acids d) Neutral amino acids
Hydrophobic interactions occur between: a) Polar amino acids b) Nonpolar amino acids c) Charged amino acids d) All amino acids
The main form of energy storage in animals is: a) Starch b) Glycogen c) Triglycerides d) Proteins
Fatty acids are components of: a) Carbohydrates b) Proteins c) Lipids d) Nucleic acids
Saturated fatty acids have: a) Double bonds b) Triple bonds c) No double bonds d) Aromatic rings
Unsaturated fatty acids have: a) No double bonds b) One or more double bonds c) Triple bonds d) Aromatic rings
Phospholipids have: a) Hydrophilic head only b) Hydrophobic tail only c) Both hydrophilic head and hydrophobic tail d) Neither hydrophilic nor hydrophobic parts
The optimum pH for most enzymes is: a) Highly acidic b) Highly basic c) Neutral or slightly acidic/basic d) Extremely basic
Enzyme inhibitors: a) Increase enzyme activity b) Decrease enzyme activity c) Have no effect on enzyme activity d) Change enzyme structure permanently
Competitive inhibition occurs when: a) Inhibitor binds to allosteric site b) Inhibitor binds to active site c) Inhibitor changes enzyme shape d) Inhibitor destroys enzyme
Non-competitive inhibition occurs when: a) Inhibitor binds to active site b) Inhibitor binds to allosteric site c) Inhibitor competes with substrate d) Inhibitor increases enzyme activity
Allosteric enzymes have: a) One binding site b) Two binding sites c) Multiple binding sites d) No binding sites
Coenzymes are: a) Protein cofactors b) Non-protein cofactors c) Enzyme inhibitors d) Enzyme substrates
NAD+ is an example of: a) Enzyme b) Coenzyme c) Substrate d) Inhibitor
Metal ions can act as: a) Enzymes b) Substrates c) Cofactors d) Inhibitors
Terpenoids are: a) Primary metabolites b) Secondary metabolites c) Enzymes d) Cofactors
Essential oils are: a) Primary metabolites b) Secondary metabolites c) Enzymes d) Hormones
Lectins are: a) Carbohydrates b) Proteins c) Lipids d) Nucleic acids
Concanavalin A is an example of: a) Alkaloid b) Terpenoid c) Lectin d) Toxin
Vinblastin is used as a: a) Nutrient b) Drug c) Enzyme d) Hormone
Curcumin is found in: a) Turmeric b) Ginger c) Pepper d) Cinnamon
Gums are: a) Simple carbohydrates b) Complex carbohydrates c) Proteins d) Lipids
Polymeric substances include: a) Monosaccharides b) Amino acids c) Rubber and gums d) Fatty acids
Reducing sugars have: a) Free aldehyde or ketone groups b) No free aldehyde or ketone groups c) Only aldehyde groups d) Only ketone groups
Non-reducing sugars have: a) Free aldehyde or ketone groups b) No free aldehyde or ketone groups c) Only aldehyde groups d) Only ketone groups
Sucrose is a: a) Reducing sugar b) Non-reducing sugar c) Monosaccharide d) Polysaccharide
Maltose is a: a) Reducing sugar b) Non-reducing sugar c) Monosaccharide d) Polysaccharide
The isoelectric point of an amino acid is when: a) It has positive charge b) It has negative charge c) It has zero net charge d) It has maximum charge
Zwitterion is: a) Positively charged amino acid b) Negatively charged amino acid c) Neutral amino acid with both positive and negative charges d) Uncharged amino acid
Denaturation of proteins involves: a) Breaking of primary structure b) Breaking of secondary and tertiary structure c) Breaking of peptide bonds d) Formation of new bonds
Renaturation of proteins is: a) Always possible b) Never possible c) Sometimes possible d) Only possible with enzymes
Lipoproteins are: a) Proteins only b) Lipids only c) Complexes of proteins and lipids d) Carbohydrates
Glycoproteins are: a) Proteins only b) Carbohydrates only c) Complexes of proteins and carbohydrates d) Lipids
Enzyme kinetics studies: a) Enzyme structure b) Enzyme function c) Rate of enzyme-catalyzed reactions d) Enzyme synthesis
Km (Michaelis constant) indicates: a) Maximum velocity b) Substrate concentration at half maximum velocity c) Enzyme concentration d) Product concentration
Vmax indicates: a) Minimum velocity b) Maximum velocity c) Average velocity d) Initial velocity
Lineweaver-Burk plot is used to determine: a) Enzyme concentration b) Substrate concentration c) Km and Vmax d) Product concentration
Allolactose is an example of: a) Enzyme b) Substrate c) Inducer d) Repressor
Feedback inhibition occurs when: a) Substrate inhibits enzyme b) Product inhibits enzyme c) Cofactor inhibits enzyme d) Coenzyme inhibits enzyme
Isozymes are: a) Same enzyme, different substrates b) Different enzymes, same substrate c) Different forms of same enzyme d) Same enzyme, different products
Ribozymes are: a) Protein enzymes b) RNA enzymes c) DNA enzymes d) Carbohydrate enzymes
Abzymes are: a) Natural enzymes b) Synthetic enzymes c) Catalytic antibodies d) Inactive enzymes
Multienzyme complexes are: a) Single enzymes b) Multiple enzymes working together c) Enzyme inhibitors d) Enzyme activators
Glycolysis involves: a) Protein breakdown b) Lipid breakdown c) Carbohydrate breakdown d) Nucleic acid breakdown
Gluconeogenesis is: a) Glucose breakdown b) Glucose synthesis c) Glycogen breakdown d) Glycogen synthesis
Lipogenesis is: a) Lipid breakdown b) Lipid synthesis c) Protein synthesis d) Carbohydrate synthesis
Lipolysis is: a) Lipid breakdown b) Lipid synthesis c) Protein breakdown d) Carbohydrate breakdown
Essential amino acids are: a) Synthesized by body b) Not synthesized by body c) Not required by body d) Toxic to body
Non-essential amino acids are: a) Synthesized by body b) Not synthesized by body c) Not required by body d) Toxic to body
Semi-essential amino acids are: a) Always synthesized by body b) Never synthesized by body c) Synthesized under certain conditions d) Not required by body
Protein quality is determined by: a) Amino acid composition b) Protein size c) Protein color d) Protein taste
Biological value of protein indicates: a) Protein quantity b) Protein quality c) Protein color d) Protein taste
Complete proteins contain: a) Some essential amino acids b) All essential amino acids c) No essential amino acids d) Only non-essential amino acids
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