If equal quantities of substrste and competitive inhibitors(drugs) are present, then which one will bind to the enzyme first?

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Solution

As the name suggests competitive inhibitors, there is always competition between the substrate and competitive inhibitors regardless of the quantities present. Whichever is nearer to the active site of the enzyme will bind first as they both have strong affinity for the active site.

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Similar questions

Q. Assertion :Competitive inhibitors compete with the natural substrate for their attachment on the active sites of enzymes. Reason: In competitive inhibition, inhibitor binds to allosteric site of the enzyme.

Q. Consider the following three statements about enzyme inhibitor drug –
(i) It decreases the catalytic action of enzyme
(ii) It prevents the binding of substrate to enzyme
(iii) It can be of both competitive or non-competitive type
Which of the above statements are correct?

Q. Condition A : Substrate X, specific for Enzyme E1, can be replaced by molecule C (which blocks the enzyme), if C is present in more concentration.
Condition B : Substrate Y can never bind to Enzyme E2, if molecule D binds to the enzyme.
a. At which sites are molecules C and D binding to the enzyme E1 and E2 respectivbely?
b. Which kind of inhibitors are C and D?
c. Describe another factor which can effect an enzyme's activity.

Which of the following statements is not true about enzyme inhibitors?
(a) Inhibit the catalytic activity of the enzyme
(b) Prevent the binding of substrate
(c) Generally a strong covalent bond is formed between an inhibitor and an enzyme
(d) Inhibitors can be competitive or non-competitive

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