BCH101intermediate
Select ALL correct statements about enzyme components.
Answer
A tightly bound cofactor can be called a prosthetic group., An organic cofactor is commonly called a coenzyme., Metal ions can serve as cofactors.
Explanation
### Why this is right
- **A tightly bound cofactor can be called a prosthetic group**: prosthetic groups remain closely associated with the enzyme during catalysis.
- **An organic cofactor is commonly called a coenzyme**: coenzymes transfer electrons or chemical groups in many reactions.
- **Metal ions can serve as cofactors**: ions such as magnesium support enzyme structure or catalysis.
### The concept
The protein portion and its required nonprotein component have different names depending on whether they are considered separately or together. A complete active enzyme is a holoenzyme.
### The other options
- **An apoenzyme includes the protein and every required cofactor**: an apoenzyme is the protein portion without its required cofactor.
### Terms
- **Prosthetic group**: a tightly bound nonprotein component of an enzyme.
- **Coenzyme**: an organic cofactor that assists enzyme catalysis.
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