Penicillin blocks the active sites of an enzyme that many bacteria use in making cell walls. It is an example of:
Correct answer: A. Competitive inhibition
- A. Competitive inhibition
- B. Noncompetitive inhibition
- C. Feedback inhibition
- D. Radiation effect
Explanation
Option B should be non competitive inhibition instead of incompetitive inhibition.Option A: Competitive inhibition: Many antibiotic are inhibitors of specific enzyme in bacteria e.g. penicillin blocks the active site of an enzyme that many bacteria use tomade cell-walls. These antibiotics are example of competitive inhibition. Hence, this option is correct.
Last updated
About Enzymes
Enzymes are biological catalysts that lower activation energy without being consumed, and their specificity is explained by the lock and key and induced fit models. Work includes the effects of temperature, pH and substrate concentration on reaction rate, plus competitive and non-competitive inhibition and how these differ.
Practise Enzymes
633 free Enzymes MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A/An _ is mostly a non-protein chemical compound that is required for the protein's biological activity.
A chemical substance that can react with an enzyme but not transform into a product is called a/an:
A chemical substance that can react with an enzyme faster than a real substrate and without producing a product is
A chemical substance which can react (in place of substrate) with the enzyme but is not transformed into product(s) and thus blocks the active site temporarily or permanently is called:
A chemical substance which can react with an enzyme but not transform into a product is called a/an: