CBSE  /  Class 12  /  Chemistry  /  Biomolecules

  • 1. 
    Cellulose is a

  • hexapolysaccharide
  • pentapolysaccharide
  • tripolysaccharide
  • None of these

  • 2. 
    The letter ‘D’ in carbohydrates signifies

  • dextrorotatory
  • configuration
  • diamagnetic nature
  • mode of synthesis

  • 3. 
    A diabetic person carries a packet of glucose with him always, because

  • glucose increases the blood sugar level slowly
  • glucose reduces the blood sugar level
  • glucose increases the blood sugar level almost instantaneously
  • glucose reduces the blood sugar level slowly

  • 4. 
    Among the naturally occurring carbohydrates, furanose ring is found in the

  • Glucose unit of cane sugar
  • Glucose unit of cellulose
  • Fructose unit of cane sugar
  • Galactose unit of lactose

  • 5. 
    Globular proteins are present in

  • blood
  • eggs
  • milk
  • all of these

  • 6. 
    Which one of the amino acids can be synthesised in the body?

  • Alanine
  • Lysine
  • Valine
  • Histidine

  • 7. 
    Which of the following is not true about amino acids?

  • They are constituents of all proteins
  • Alanine having one amino and one carboxylic group
  • Most naturally occurring amino acids have D-configuration
  • Glycine is the only naturally occuring amino acid which is optically inactive.

  • 8. 
    A compound which contains both ………… and ………… is called amino acid. The amino acids is polypeptide chain are joined by ………/ bonds.

  • amino, carboxylic group, ester
  • amino, carboxylic group, peptide
  • nitrogen, carbon, glycosidic
  • hydroxy, carboxylic group, peptide

  • 9. 
    Denaturation of protein leads to loss of its biological activity by

  • formation of amino acids
  • loss of primary structure
  • loss of both primary and secondary structure
  • loss of both secondary and tertiary structures

  • 10. 
    Proteins are condensation polymers of

  • α-amino acids
  • β-amino acids
  • α-hydroxy acids
  • β-hydroxy acids
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