There are number of cases in which non-protein constituents called co-factors are bound to the enzyme to make the enzyme catalytically active. In these instances, the protein portion of the enzymes is called the apoenzyme. Three kinds of co-factors are identified prosthetic groups, co-enzymes and metal ions. Prosthetic groups are organic compounds and they are tightly bound with apoenzyme. Co-enzymes are also organic compounds but their association with apoenzyme is only transient.
The protein portion of an enzyme is called:
NEET UG 2025 — Chemistry Organic Chemistry
2025mcqeasy
The protein portion of an enzyme is called:
Official previous-year question
Held on 30 Apr 2025 · Verified 9 Jul 2026.
Options
- A
Cofactor
- B
Coenzyme
- C
Apoenzyme
- D
Prosthetic group
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