The 'lock and key' model describes:
Enzyme denaturation.
The specificity of enzyme-substrate binding.
Competitive inhibition.
Allosteric regulation.
Related Questions
Which statement regarding coenzyme is incorrect?
They are organic molecules.
They are not consumed during the reaction.
They are essential for the activity of some enzymes.
They are tightly bound to the enzyme.
Certain RNA molecules can act as enzymes. These are known as:
Ribozymes
Ribosomes
Ribonucleases
Ribose
Arrange the steps of enzyme catalysis in the correct order:
(i) Substrate binds to the active site.
(ii) Enzyme-substrate complex is formed.
(iii) Chemical bonds of the substrate are broken.
(iv) Products are released.
(v) Free enzyme is ready to bind another substrate.
ii, i, iii, iv, v
i, ii, iii, v, iv
i, ii, iv, iii, v
i, ii, iii, iv, v
Which of the following is not a coenzyme?
NAD
NADP
FAD
ATP
The catalytic efficiency of an enzyme is BEST represented by which of the following parameters?
The substance, which is metal ion essential for the normal functioning of enzyme is called
Cofactor
Coenzyme
Holoenzyme
None of these
Malonate inhibits succinate dehydrogenase, is an example of
Allosteric inhibition
Negative feedback
Competitive inhibition
Non-competitive inhibition
The inhibitor which inhibits the enzyme activity by binding to the active site of the enzyme, due to the close resemblance to the substrate in its molecular structure is called
Non-competitive inhibitor
Competitive inhibitor
Allosteric modulator
Feedback inhibitor
What is the primary function of an enzyme?
To provide structural support to cells.
To transport molecules across cell membranes.
To catalyze biological reactions.
To store genetic information.
Malonate resembles succinate in structure and inhibits succinic dehydrogenase. This is an illustration of:
Feedback inhibition
Allosteric regulation
Non-competitive inhibition
Competitive inhibition
