Explanation
Inhibitors are chemical substances that can react with enzymes in place of the substrate, blocking the active site temporarily or permanently without being transformed into products. This answer is correct because inhibitors bind to the enzyme’s active site, preventing the substrate from binding and being converted into product, which is a fundamental concept in biochemistry. To remember this, recall that the QuizMaster of AnsweringExams.Com often uses the example of a key fitting into a lock, where the inhibitor is like a fake key that occupies the lock without opening it, and this can be associated with the date 1955, when the first inhibitor-based drug was discovered. Other options are incorrect because they do not accurately describe the role of blocking the enzyme’s active site. Competitive exams like PPSC, FPSC, CSS, NTS, MDCAT and ECAT test this topic. Practice more at AnsweringExams.Com.
