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Biomolecules (Biology) · Question 19

RE-NEET (UG) 2024MCQEasy📈 Topic in 38% papers+4−1
1

Which of the following graphs depicts the effect of substrate concentration on velocity of enzyme catalysed reaction?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

Answer

(1) [figure]

Solution

With increase in substrate concentration, the velocity of the enzymatic reaction rises at first almost linearly. As more and more enzyme molecules get occupied, the rise slows down, and the velocity finally levels off at the maximum velocity ( Vmax), which is not exceeded by any further rise in substrate concentration (all active sites saturated).

This gives a hyperbolic curve approaching Vmax, as in graph (A).

Answer: (1)

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2

Enzymes that catalyse the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds, are known as :

  1. Transferases
  2. Oxidoreductases
  3. Dehydrogenases
  4. Lyases
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3

Match List-I with List-II. Choose the correct answer from the options given below :

  1. A-III, B-IV, C-II, D-I
  2. A-III, B-II, C-I, D-IV
  3. A-I, B-III, C-II, D-IV
  4. A-IV, B-III, C-II, D-I
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4

Cellulose does not form blue colour with Iodine because

  1. It is a helical molecule
  2. It does not contain complex helices and hence cannot hold iodine molecules
  3. It breaks down when iodine reacts with it
  4. It is a disaccharide
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5

Malonate inhibits the growth of pathogenic bacteria by inhibiting the activity of

  1. Amylase
  2. Lipase
  3. Dinitrogenase
  4. Succinic dehydrogenase
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6

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

  1. Both Statement I and Statement II are false.
  2. Statement I is true but Statement II is false.
  3. Statement I is false but Statement II is true.
  4. Both Statement I and Statement II are true.
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7

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

  1. Both Statement I and Statement II are false.
  2. Statement I is true but Statement II is false.
  3. Statement I is false but Statement II is true.
  4. Both Statement I and Statement II are true.
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8

Read the following statements on lipids and find out correct set of statements : Choose the correct answer from the options given below:

  1. A, B and C only
  2. A, D and E only
  3. C, D and E only
  4. A, B and D only
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9

A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is C6H12O6 then what is the formula for maltose?

  1. C12H20O10
  2. C12H24O12
  3. C12H22O11
  4. C12H24O11
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10

Match List-I with List-II: Choose the correct answer from the options given below:

  1. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
  2. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
  3. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  4. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
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11

Match List-I with List-II Choose the correct answer from the options given below

  1. (a) - (i), (b) - (iv), (c) - (iii), (d) - (ii)
  2. (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
  3. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
  4. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
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