Enzymes (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What type of substance is a cofactor?
What type of substance is a cofactor?
A non-protein substance required by enzyme
Which metal ion does carbonic anhydrase use in its active site?
Which metal ion does carbonic anhydrase use in its active site?
Zinc ion (Zn²⁺)
Which B-group vitamin is used to synthesize the coenzyme FAD?
Which B-group vitamin is used to synthesize the coenzyme FAD?
Riboflavin (vitamin B₂)
What does coenzyme A transfer during respiration?
What does coenzyme A transfer during respiration?
Acetyl groups
What is a prosthetic group?
What is a prosthetic group?
A cofactor permanently part of an enzyme
How do heavy metal ions like lead and mercury inhibit enzymes?
How do heavy metal ions like lead and mercury inhibit enzymes?
Form covalent bonds with sulfur R groups
How can competitive inhibition be overcome?
How can competitive inhibition be overcome?
By increasing substrate concentration
Where do non-competitive inhibitors bind on an enzyme?
Where do non-competitive inhibitors bind on an enzyme?
An allosteric site
Which enzyme does cyanide irreversibly inhibit?
Which enzyme does cyanide irreversibly inhibit?
Cytochrome oxidase
What type of inhibition do statins use to reduce cholesterol?
What type of inhibition do statins use to reduce cholesterol?
Competitive inhibition