Question

List and describe the parts/stages of cellular respiration and where in the cell each takes place in animal and plant cells. [Knowledge, Comprehension]

Answer 1

The three stages of cellular respiration are glycolysis, the Krebs cycle, and the electron transport chain. In animal and plant cells, glycolysis occurs in the cytoplasm, while the Krebs cycle and electron transport chain occur in the mitochondria.

Step-by-step explanation:

The three stages of cellular respiration are:

1. Glycolysis: This stage occurs in the cytoplasm and does not require oxygen. Glucose is broken down into two molecules of pyruvate, and a small amount of ATP is produced.
2. Krebs cycle: Also known as the citric acid cycle, this stage takes place in the mitochondria. Pyruvate is further broken down, and high-energy molecules like NADH and FADH2 are produced.
3. Electron transport chain: This stage also occurs in the mitochondria. NADH and FADH2 transfer electrons to the electron transport chain, which uses the energy released to produce a large amount of ATP.

In animal cells, glycolysis occurs in the cytoplasm, while the Krebs cycle and electron transport chain take place in the mitochondria. Plant cells also go through the same stages of cellular respiration, with glycolysis occurring in the cytoplasm and the Krebs cycle and electron transport chain in the mitochondria. Plant cells have an additional organelle called the chloroplast, where photosynthesis takes place.