Acetyl co a can
a) enter the citric acid (krebs cycle)
b) combine with another acetyl co a
c) be converted to glycerol
d) be converted to glycerol
e) both a and b are correct

Both a and b are correct.

Explanation:

Acetyl co A or acetyl coenzyme A is a chemical molecule that plays an important role in the biochemical reactions. This molecule acts as an intermediate molecule in various reactions.

Acetyl co A delivers the acetyl group in the citric acid cycle. Acetyl co A can also combine with another acetyl co A during the synthesis of fatty acid.

Thus, the correct answer is option (E).

good thing- during decomposition the organic molecules in organic matter are broken down into simpler organic molecules that require further decomposition or into mineralised nutrients

bad thing- it can be harmful in crop productivity

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme