CBSE Class 12 Chemistry Chapter 14 Biomolecules MCQs
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CBSE Class 12 Chemistry Chapter 14 Biomolecules MCQs (SET A)
1. Insulin is a protein which plays the role of
(A) An antibody
(B) A harmone
(C) An enzyme
(D) A transport agent
Answer:- A harmone.
1. Proteins fulfil several functions in living systems. An example of a protein which acts as a hormone is
(A) Casein
(B) Oxytocin
(C) Trypsin
(D) Keratin
Answer:- Oxytocin.
3. Pick out the unsaturated fatty acid from the following
(A) Stearic acid
(B) Lauric acid
(C) Oleic acid
(D) Palmitic acid
Answer:- Oleic acid.
4. Vitamin contains metal
(A) Ca (II)
(B) Zn (II)
(C) Fe (II)
(D) Co (III)
Answer:- Co (III).
5. Protein can be most easily removed from
(A) Alkanes
(B) Alkenes
(C) Alkynes
(D) Benzene
Answer:- Benzene.
6. The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called
(A) Zymase
(B) Pepsin
(C) Maltase
(D) Lipase
Answer:- Lipase.
CBSE Class 12 Chemistry Chapter 14 Biomolecules MCQs (SET B)
1. The helical structure of protein is stabilized by
(A) Ether bonds
(B) Peptide bonds
(C) Dipeptide bonds
(D) Hydrogen bonds
Answer:- Hydrogen bonds.
2. The cell membranes are mainly composed of
(A) Carbohydrates
(B) Proteins
(C) Phospholipids
(D) Fats
Answer:- Proteins.
3. A compound of mol. wt. 180 is acetylated to give a compound of mol. wt. 390. The number of amino groups in the initial compound is
(A) 2
(B) 4
(C) 5
(D) 6
Answer:- 2.
4. Starting with three different amino acid molecules, how many different tripeptide molecules are formed
(A) 12
(B) 9
(C) 8
(D) 6
Answer:- 6.
5. Proteins do not respond to
(A) Biuret test
(B) Heller’s ring test
(C) Ninhydrin test
(D) Lucas test
Answer:- Lucas test.
6. When glucose reacts with bromine water, the main product is
(A) Acetic acid
(B) Saccharic acid
(C) Glyceraldyhyde
(D) Gluconic acid
Answer:- Gluconic acid.
CBSE Class 12 Chemistry Chapter 14 Biomolecules MCQs (SET C)
1. Ribose is an example of
(A) Ketohexose
(B) Aldopentose
(C) Disaccharide
(D) Aldohexose
Answer:- Aldopentose.
2. The two forms of D-glucopyranose obtained from the solution of D-glucose are called
(A) Isomer
(B) Anomer
(C) Epimer
(D) Enantiomer
Answer:- Anomer.
3. Which is polysaccharide
(A) Starch
(B) Cellulose
(C) Glycogen
(D) All of these
Answer:- All of these.
4. The calorific values of fats, carbohydrates and proteins vary in the order
(A) Fats > Carbohydrates > Proteins
(B) Fats > Proteins > Carbohydrates
(C) Carbohydrates > Proteins > Fats
(D) Proteins > Carbohydrates > Fats
Answer:- Fats > Carbohydrates > Proteins.
5. Gun-cotton is obtained when conc. nitric acid reacts with
(A) Glycerine
(B) Glycol
(C) Cellulose
(D) Starch
Answer:- Cellulose.
6. Glucose forms many derivatives. The derivative which will help to prove the furanose structure is
(A) Acetyl
(B) Benzoyl
(C) Osazone
(D) Isopropylidene
Answer:- Benzoyl.
CBSE Class 12 Chemistry Chapter 14 Biomolecules MCQs (SET D)
1. Which is used in motion picture films
(A) Cellulose acetate
(B) Glucose acetate
(C) Starch acetate
(D) Sucrose acetate
Answer:- Cellulose acetate.
2. Glucose reacts with acetic anhydride to form
(A) Mono-acetate
(B) Tetra-acetate
(C) Penta-acetate
(D) Hexa-acetate
Answer:- Penta-acetate.
3. Which of the following does not show any reducing test of aldehyde
(A) Sucrose
(B) Fructose
(C) Maltose
(D) Lactose
Answer:- Sucrose.
4. When amylases catalyse the hydrolysis of starch, the final product obtained is chiefly
(A) Cellobiose
(B) Glucose
(C) Maltose
(D) Sucrose
Answer:- Maltose.
5. Galactose is converted into glucose in
(A) Mouth
(B) Stomach
(C) Liver
(D) Intestine
Answer:- Liver.
6. A nucleotide consists of
(A) Base and sugar
(B) Base and phosphate
(C) Sugar and phosphate
(D) Base, sugar and phosphate
Answer:- Base, sugar and phosphate.
CBSE Class 12 Chemistry Chapter 14 Biomolecules MCQs (SET E)
1. The base adenine occurs in
(A) DNA only
(B) RNA only
(C) DNA and RNA both
(D) Protein
Answer:- DNA and RNA both.
2. Curdling of milk is an example of:
(A) Breaking of peptide linkage
(B) Hydrolysis of lactose
(C) Breaking of protein into amino acids
(D) Denaturation of protein
Answer:- Denaturation of protein.
3. Complete hydrolysis of starch gives:
(A) Glucose only
(B) Galactose and fructose in equimolar amounts
(C) Glucose and galactose in equimolar amounts
(D) Glucose and fructose in equimolar amounts
Answer:- Glucose only.
4. Glycosidic linkage is actually a/an:
(A) Carbonyl bond
(B) Ether bond
(C) Ester bond
(D) Amide bond
Answer:- Ether bond.
5. Among the following, the essential amino acid is:
(A) Alanine
(B) Valine
(C) Aspartic acid
(D) Serine
Answer:- Valine.
6. The couplings between base units of DNA is through
(A) Hydrogen bonding
(B) Electrostatic bonding
(C) Covalent bonding
(D) Van der Waal’s forces
Answer:- Hydrogen bonding.
CBSE Class 12 Chemistry Chapter 14 Biomolecules MCQs (SET E)
1. Which of the following polymer is stored in the liver of animals?
(A) Amylose
(B) Cellulose
(C) Amylopectin
(D) Glycogen
Answer:- Glycogen.
2. The non-essential amino acid among the following is:
(A) Valine
(B) Leucine
(C) Alanine
(D) Lysine
Answer:- Alanine.
3. Which of the following compounds can form a zwitter ion?
(A) Aniline
(B) Acetanilide
(C) Glycine
(D) Benzoic acid
Answer:- Glycine.
4. Invert sugar is
(A) Chemically inactive form of sugar
(B) Equimolecular mixture of glucose and fructose
(C) Mixture of glucose and sucrose
(D) A variety of cane sugar
Answer:- Equimolecular mixture of glucose and fructose.
5. The helical structure of protein is stabilized by
(A) Dipeptide bonds
(B) Hydrogen bonds
(C) Ether bonds
(D) Peptide bonds
Answer:- Hydrogen bonds.
6. DNA multiplication is called
(A) Translation
(B) Transduction
(C) Transcription
(D) Replication
Answer:- Replication.
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