If one of the reactants was not available, what would happen to the cell's ability to break down glucose

Question

The cell's ability to break down glucose would be unchanged.
The cell's ability to break down glucose would be unchanged.

The cell's ability to break down glucose would be increased.
The cell's ability to break down glucose would be increased.

The cell's ability to break down glucose would be halted (stopped).

Answer 1

The cell's ability to break down glucose would be halted (stopped).