Enzyme: MCQs Quiz – 2 17


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A online test of MCQs (Multiple Choice Questions) on “Enzyme“. Quiz No. 2

More MCQs: "Enzyme" | “Cell Structure and Function” | All MCQs Quiz on "Biology" | More MCQs on Biology

Enzyme: MCQs Quiz - 2

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Question 1
Enzymes are sensitive to
A
cold
B
cell wall
C
heat
D
pressure
Question 2
Specificity of protein in enzyme action depends upon
A
Active sites
B
Km constant
C
Linear sequence of amino acids
D
Turn over number
Question 3
ELISA tests are used to
A
Isolate DNA sequence
B
Purity proteins
C
Separate viral RNA
D
Identify specific proteins
Question 4
In which of the following organisms enzymes are absent
A
Fungi
B
Viruses
C
Algae
D
Bacteria
Question 5
Enzymes exist in the cells as
A
Solution
B
Crystals
C
Solids
D
Colloids
Question 6
Enzymes functional inside the cells are called
A
endoenzymes
B
exoenzymes
C
apoenzymes
D
isoenzymes
Question 7
Enzymes having slightly different molecules structure but performing identical activity are
A
Apoenzymes
B
Isoenzymes
C
Holoenzymes
D
Coenzymes
Question 8
Enzymes, vitamins and hormones are common in
A
Enhancing oxidative metabolism
B
Being synthesised in the body of organisms
C
Being proteinaceous
D
Regulating metabolism
Question 9
Which of the following influence feedback inhibition of enzyme?
A
End product
B
External factors
C
Enzyme
D
Substrate
Question 10
Hydrolysis of starch occurs with the help of
A
Peptidase
B
Amylase
C
Sucrose
D
Lipase
Question 11
In a cell, digestive enzymes mostly occur in
A
Mitochondria
B
Lysosomes
C
Ribosome
D
Plastids
Question 12
A protein having both structural and enzymatic traits is
A
Collagen
B
Trypsin
C
Myosin
D
Actin
Question 13
Km value of enzyme is substrate concentration at
A
1/2 V max
B
2 V max
C
1/4 V max
D
4 V max
Question 14
One common example of feedback inhibition would be ______.
A
Allosteric inhibition of hexokinase by glucose-6-phosphate
B
Reaction between succinic dehydrogenase and succinic acid
C
Cyanide and cytochrome reaction
D
Sulfa drugs and folic acid synthesis in bacteria
Question 15
NADP+ is
A
Enzyme activator
B
Ion carrier
C
Hydrogen acceptor
D
Electron acceptor
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There are 15 questions to complete.

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17 thoughts on “Enzyme: MCQs Quiz – 2

  • Indrani Sarkar

    Q. 15 NADP+ is –
    NADP+ is an electron acceptor which accepts one hydrogen and electron and gets reduced to form NADPH.

    Then how the answer is c. Hydrogen Acceptor ??

  • malar

    in qs.no4 viruses have reverse transcriptase enzyme.then how could it will be without enzyme? please explain

    • Indrani Sarkar

      I think they have consider the fact that, viruses always need a host to activate their proteins and enzymes. Without host, viruses are considered to be dead particles.

  • kavya somisetty

    In question 11 most of the enzymes occur in mitochondria but its given lysosomes could you explain it admin.

    • Indrani Sarkar

      Lysosome is called as Suicidal bag because it contain so many digestive enzymes and can digest the cellular particles. Consider this fact.

  • suseela

    how is myosin a protein having structural and enzymatic traits ? please explain

  • Ramesh

    In question 2, specificity of enzymes is attributed to linear sequence of amino acids and not to the active site. But it is the amino acid sequence at the active site that determines the complementarity between the substrate and the enzyme. The complememtarity is responsible for enzyme specificity.

  • anne nath

    in some books, it is given that most of the enzymes occur in mitochondria than lysosomes.
    admin pls tell me that in this case what will be the correct answer.

    • JAGDESH KUMAR

      the questn iz digestv enzyme presnt in lysomes

      • harika

        most of the enzymes are present in cell are in mitochondria.but lysosome is the only organelle for digesting enzymes.how can it be wrong??

  • delightdev

    i feel viruses do also contain enzymes like reverse transcriptase
    admin plz let me know

    • Ramesh

      Yes, but only retroviruses contain reverse transcriptase.

    • kavya somisetty

      but viruses secret enzymes during their multiplication to dissolve the cell wall of bacteria.
      could you explain admin?