Which chemical, apart from glucose, is used in aerobic respiration?

Oxygen is the other chemical used in aerobic respiration, apart from glucose.

Here's a step-by-step explanation:

1. Aerobic respiration is a process that takes place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.

2. The process of aerobic respiration involves three main stages: Glycolysis, the Krebs cycle, and the Electron Transport Chain.

3. In the first stage, glucose is broken down in the cytoplasm of the cell during glycolysis.

4. The products of glycolysis then enter the mitochondria, where the Krebs cycle and Electron Transport Chain occur.

5. Oxygen is crucial in the final stage of aerobic respiration, the Electron Transport Chain. Here, it acts as the final electron acceptor in the chain, combining with electrons and hydrogen ions to form water.

6. Without oxygen, the Electron Transport Chain would not be able to occur, and aerobic respiration would halt. This is why oxygen is so vital for aerobic organisms.

So, apart from glucose, oxygen is the other key chemical used in aerobic respiration.