Complete question:
Some students were asked to contrast photosynthesis and cellular respiration. Which of the following correctly identifies a difference in the two?
1. Cellular respiration stores ATP, and photosynthesis releases ATP.
2. Photosynthesis uses oxygen, while cellular respiration produces carbon dioxide.
3. Photosynthesis uses sunlight, while cellular respiration releases sunlight.
4. Photosynthesis uses carbon dioxide, and cellular respiration produces carbon dioxide.
Answer:
The correct option is 4. Photosynthesis uses carbon dioxide, and cellular respiration produces carbon dioxide.
Step-by-step explanation:
Photosynthesis and respiration are two complementary processes.
- Photosynthesis occurs in chloroplasts, while respiration occurs in mitochondria.
- The photosynthetic process needs solar radiation to produce organic compounds, while the respiration process needs the organic compounds to obtain chemical energy.
- Photosynthesis transforms CO₂ into organic compounds, while respiration transforms organic compounds into CO₂.
- In the process of photosynthesis, it occurs a release of oxygen, which is then used during the respiration process.
- Both processes are part of the carbon biological cycle.
- Both processes use electron transport chains to capture energy, which will be used in other cellular reactions.
- Respiration´s final products are CO₂, ATP, and water
- Photosynthesis´s final products are carbohydrates and oxygen.