If a cell loses the ability to catalyze a chemical reaction, this loss indicates a malfunction of what - polysaccharides, enzymes. fats or glycerol?

The answer here is enzymes.

That's because enzymes are used as chemical catalysts in a reaction.

Typically they make a reaction occur much more quickly or much more likely to occur but are not changed in the process.

Normally this is due to the shape of the molecule helping two reagents to come together and react.

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