Unit 19: Biomolecules — Online MCQ Test
CHEMISTRY · NEET (All) · NEET
Practice Unit 19: Biomolecules with a free chapter-wise online MCQ test.
This chapter covers: General introduction and importance of biomolecules. CARBOHYDRATES - Classification; aldoses and ketoses: monosaccharides (glucose and fructose) and constituent monosaccharides of....
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Unit 19: Biomolecules — Important Questions & Answers
Which one of the following is the most abundant protein in the animals?
- A. Collagen
- B. Lectin
- C. Insulin
- D. Haemoglobin
Answer: A. Collagen
Collagen is the most abundant protein in the animal kingdom.
Collagen is the most abundant protein in the animal kingdom.
Identify the substances having glycosidic bond and peptide bond, respectively in their structure:
- A. Glycerol, trypsin
- B. Cellulose, lecithin
- C. Inulin, insulin
- D. Chitin, cholesterol
Answer: C. Inulin, insulin
Inulin is a polymer of fructose (polysaccharide) containing glycosidic bonds. Insulin is a protein (hormone) containing peptide bonds.
Inulin is a polymer of fructose (polysaccharide) containing glycosidic bonds. Insulin is a protein (hormone) containing peptide bonds.
Sucrose on hydrolysis gives:
- A. alpha-D-Glucose + beta-D-Glucose
- B. alpha-D-Glucose + beta-D-Fructose
- C. alpha-D-Fructose + beta-D-Fructose
- D. beta-D-Glucose + alpha-D-Fructose
Answer: B. alpha-D-Glucose + beta-D-Fructose
Sucrose is a disaccharide that on hydrolysis yields one molecule of alpha-D-glucose and one molecule of beta-D-fructose.
Sucrose is a disaccharide that on hydrolysis yields one molecule of alpha-D-glucose and one molecule of beta-D-fructose.
Which of the following is a natural polymer?
- A. poly (Butadiene-styrene)
- B. polybutadiene
- C. poly (Butadiene-acrylonitrile)
- D. cis-1,4-polyisoprene
Answer: D. cis-1,4-polyisoprene
Natural rubber is chemically cis-1,4-polyisoprene.
Natural rubber is chemically cis-1,4-polyisoprene.
Which of the following is a natural polymer?
- A. poly (Butadiene-styrene)
- B. polybutadiene
- C. poly (Butadiene-acrylonitrile)
- D. cis-1,4-polyisoprene
Answer: D. cis-1,4-polyisoprene
Natural rubber is cis-1,4-polyisoprene. The others are synthetic rubbers.
Natural rubber is cis-1,4-polyisoprene. The others are synthetic rubbers.
Match the List-I (Name of Vitamin) with List-II (Deficiency disease). List-I: (A) Vitamin B₁₂, (B) Vitamin D, (C) Vitamin B₂, (D) Vitamin B₆. List-II: (I) Cheilosis, (II) Convulsions, (III) Rickets, (IV) Pernicious anaemia.
- A. A-I, B-III, C-II, D-IV
- B. A-IV, B-III, C-I, D-II
- C. A-II, B-III, C-I, D-IV
- D. A-IV, B-III, C-II, D-I
Answer: B. A-IV, B-III, C-I, D-II
B₁₂ - Pernicious anaemia (A-IV), D - Rickets (B-III), B₂ - Cheilosis (C-I), B₆ - Convulsions (D-II).
B₁₂ - Pernicious anaemia (A-IV), D - Rickets (B-III), B₂ - Cheilosis (C-I), B₆ - Convulsions (D-II).
Sugar ‘X’: A. is found in honey. B. is a keto sugar. C. exists in α and β – anomeric forms. D. is laevorotatory. ‘X’ is:
- A. D-Glucose
- B. D-Fructose
- C. Maltose
- D. Sucrose
Answer: B. D-Fructose
D-Fructose is a keto-hexose, exists in α/β forms, and is strongly laevorotatory.
D-Fructose is a keto-hexose, exists in α/β forms, and is strongly laevorotatory.
Match List I with List II. List I List II A. Adenosine I. Nitrogen base B. Adenylic acid II. Nucleotide C. Adenine III. Nucleoside D. Alanine IV. Amino acid
- A. A-III, B-IV, C-II, D-I
- B. A-III, B-II, C-IV, D-I
- C. A-III, B-II, C-I, D-IV
- D. A-II, B-III, C-I, D-IV
Answer: C. A-III, B-II, C-I, D-IV
Adenosine is a nucleoside, adenylic acid is a nucleotide, adenine is a nitrogen base, and alanine is an amino acid.
Adenosine is a nucleoside, adenylic acid is a nucleotide, adenine is a nitrogen base, and alanine is an amino acid.
Match List I with List II. List I (Molecule) | List II (Category) A. Adenosine | I. Nitrogen base B. Adenylic acid | II. Nucleotide C. Adenine | III. Nucleoside D. Alanine | IV. Amino acid Choose the option with all correct matches.
- A. A-III, B-IV, C-II, D-I
- B. A-III, B-II, C-IV, D-I
- C. A-III, B-II, C-I, D-IV
- D. A-II, B-III, C-I, D-IV
Answer: C. A-III, B-II, C-I, D-IV
Adenosine is a nucleoside (Adenine + ribose). Adenylic acid is a nucleotide (nucleoside + phosphate). Adenine is a nitrogenous base (purine). Alanine is an amino acid.
Adenosine is a nucleoside (Adenine + ribose). Adenylic acid is a nucleotide (nucleoside + phosphate). Adenine is a nitrogenous base (purine). Alanine is an amino acid.
In a protein molecule various amino acids are linked together by:
- A. β-glycosidic bond
- B. peptide bond
- C. dative bond
- D. α-glycosidic bond
Answer: B. peptide bond
Amino acids in proteins are linked together by peptide bonds, which are amide linkages formed by the condensation of the amino group of one amino acid and the carboxyl group of another.
Amino acids in proteins are linked together by peptide bonds, which are amide linkages formed by the condensation of the amino group of one amino acid and the carboxyl group of another.