Carbon dioxide is captured and converted into organic compounds such as sugars, in the ?
- Calvin cycle
- Krebs cycle
-Electron transport chain
- mitochondria

Calvin cycle

Explanation: Calvin cycle is a cyclic pathway in which carbon dioxide is assimilated. The process of photosynthesis is divided into two: The light reactions and carbon fixation reactions. In light reactions, chlorophyll and other light absorbing pigments absorb light from the sun and conserve it as ATP and NADPH. In carbon fixation reactions, carbon dioxide reduced to sugars in a cyclic pathway driven by ATP and NADPH. This pathway is known as the Calvin cycle.

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both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.