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10. Biomolecules Chemistry - 10. Biomolecules

Gujarat Board (GSEB) - STD 12 Science - Chemistry (GSEB - English Medium). 737 questions in this chapter.

Question types

10. Biomolecules question types

737 questions across 1 question group — pick any mix to generate a Chemistry paper with step-by-step answer keys.

737
Questions
1
Question groups
5
Question types
Sample Questions

10. Biomolecules questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
The reagents with which glucose does not react to give the corresponding tests/products are

$A$. Tollen's reagent  $B$. Schiff's reagent $C$. $\mathrm{HCN}$ $D$. $\mathrm{NH}_2 \mathrm{OH}$ $E$. $\mathrm{NaHSO}_3$

Choose the correct options from the given below:

  • A
    $A$ and $D$
  • ✓
    $B$ and $E$
  • C
    $E$ and $D$
  • D
    $B$ and $C$

Answer: B.

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Q 2M.C.Q (1 Marks)1 Mark
The incorrect statement regarding enzymes is :
  • A
    Like chemical catalysts enzymes reduce the activation energy of bio processes.
  • ✓
    Enzymes are polysaccharides.
  • C
    Enzymes are very specific for a particular reaction and substrate.
  • D
    Enzymes are biocatalysts.

Answer: B.

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Q 3M.C.Q (1 Marks)1 Mark
The incorrect statement regarding chirality is :
  • A
    The product obtained by $S _{ N } 2$ reaction of haloalkane having chirality at the reactive site shows inversion of configuration.
  • ✓
    Enantiomers are superimposable mirror images on each other.
  • C
    A racemic mixture shows zero optical rotation.
  • D
    $S_{N} 1$ reaction yields $1: 1$ mixture of both enantiomers.

Answer: B.

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Q 4M.C.Q (1 Marks)1 Mark
The $RBC$ deficiency is deficiency disease of :
  • ✓
    Vitamin $\mathrm{B}_{12}$
  • B
    $\operatorname{Vitamin} \mathrm{B}_{6}$
  • C
    $\operatorname{Vitamin} \mathrm{B}_{1}$
  • D
    Vitamin $\mathrm{B}_{2}$

Answer: A.

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Q 5M.C.Q (1 Marks)1 Mark
The reaction of concentrated sulphuric acid with carbohydrates $\left( C _{12} H _{22} O _{11}\right)$ is an example of
  • A
    Sulphonation
  • ✓
    Dehydration
  • C
    Oxidation
  • D
    Reduction

Answer: B.

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