Which of the following happen in the mitochondria during cellular respiration? (Select all that apply.)

glycolysis
the Calvin cycle
the Krebs cycle
the electron transport chain

The correct options are:

- The Krebs cycle
- The electron transport chain

Glycolysis occurs in the cytoplasm, not in the mitochondria.
The Calvin cycle is part of photosynthesis and occurs in the chloroplasts, not in the mitochondria.