NEET Chemistry - New - Biomolecules

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Question - 1

The difference between amylose and amylopectin is:

  • A Amylopectin have 1 ⟶ 4 α-linkage and 1 ⟶ 6 β-linkage
  • B Amylose have 1 ⟶ 4 α-linkage and 1 ⟶ 6 β-linkage
  • C Amylopectin have 1 ⟶ 4 α-linkage and 1 ⟶ 6 α-linkage
  • D Amylose is made up of glucose and galactose

Question - 2

The correct corresponding order of four aIdoses with configuration given below :
 
Respectively, is :

  • A L-erythrose, L-threose, L-erythrose, D-threose
  • B D-threose, D-erythrose, L-threose, L-erythrose
  • C L-erythrose, L-threose, D-erythrose, D-threose
  • D D-erythrose, D-threose, L-erythrose, L-threose.

Question - 3

Which one given below is a non-reducing sugar?

  • A Glucose
  • B Sucrose
  • C Maltose
  • D Lactose

Question - 4

Which one of the following sets of monosaccharides forms sucrose?

  • A α-D-galactopyranose and α-D glucopyranose
  • B α-D-glucopyranose and β-D-fructofuranose
  • C β-D-galactopyranose and α-D glucopyranose
  • D α-D-galactopyranose and β-D glucopyranose

Question - 5

Which one of the following statements is not true regarding (+) lactose?

  • A On hydrolysis (+) lactose gives equal amount of D(+) glucose and D(+) galactose.
  • B (+) Lactose is a β-glucoside formed by the union of a molecule of D(+) glucose and a molecule of D(+) galactose
  • C (+) Lactose is a reducing sugar and does not exhibit mutarotation.
  • D (+) Lactose, C12H22O11 contains 8-OH groups

Question - 6

Which one of the following does not exhibit the phenomenon of mutarotation?

  • A (+) Sucrose
  • B (+) Lactose
  • C (+) Maltose
  • D (-) Fructose

Question - 7

Number of chiral carbons in β-(D)-(+) glucose is :

  • A five
  • B six
  • C three
  • D four

Question - 8

Which is the correct statement?

  • A Starch is a polymer of α-glucose
  • B Amylose is a component of cellulose
  • C Proteins are composed of only one type of amino acid.
  • D In cyclic structure of fructose, there are four carbons and one oxygen atom.

Question - 9

α-D-glucose and β-D-glucose are :

  • A epimers
  • B anomers
  • C enantiomers
  • D diastereomers

Question - 10

Which of the following is the sweetest sugar?

  • A Fructose
  • B Glucose
  • C Sucrose
  • D Maltose
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