Which of the following molecules matches its property?I Competitive inhibitor – similar shape to substrate and can occupy to the same active site. II Prosthetic group – decreases the rate of enzymatic reaction by changing its structure.III Active site – specific region of the enzymes which bind to the substrate*1 pointI and II onlyI and III onlyII and III onlyI, II and III
Question
Which of the following molecules matches its property?I Competitive inhibitor – similar shape to substrate and can occupy to the same active site. II Prosthetic group – decreases the rate of enzymatic reaction by changing its structure.III Active site – specific region of the enzymes which bind to the substrate*1 pointI and II onlyI and III onlyII and III onlyI, II and III
Solution
The correct answer is "I and III only".
Here's why:
I. Competitive inhibitor – similar shape to substrate and can occupy to the same active site. This is correct. Competitive inhibitors do have a similar shape to the substrate and can bind to the active site of the enzyme, preventing the substrate from binding and thus inhibiting the reaction.
II. Prosthetic group – decreases the rate of enzymatic reaction by changing its structure. This is incorrect. Prosthetic groups are non-protein molecules that bind tightly to enzymes and help them function. They do not decrease the rate of enzymatic reactions, but rather are often necessary for the enzyme's activity.
III. Active site – specific region of the enzymes which bind to the substrate. This is correct. The active site of an enzyme is the region where the substrate binds and the chemical reaction takes place.
Similar Questions
inhibitors are molecules/compounds capable of binding to a region of the enzyme other than the active site.UncompetitiveNon-competitiveCompetitiveOver-competitive
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