Question

1. plants take in ______ gas to help create energy during photosynthesis.
2. during the light reactions, what provides the force to run atp synthase?
3. what is an autotroph?
4. during photosynthesis water is split in the ______ reactions?
5. what important energy - carrying molecules are produced in the light - dependent reactions?
6. what pigment absorbs sunlight in photosynthesis?
7. what stage of photosynthesis releases oxygen?
8. the second stage of photosynthesis is called the:

Explanation:

1. Plants take in carbon - dioxide ($CO_2$) during photosynthesis to create energy.
2. A proton gradient provides the force to run ATP synthase during the light reactions.
3. An autotroph is an organism that can produce its own food using light, water, carbon - dioxide, or other chemicals.
4. Water is split in the light reactions during photosynthesis.
5. ATP (adenosine tri - phosphate) and NADPH (nicotinamide adenine dinucleotide phosphate) are important energy - carrying molecules produced in the light - dependent reactions.
6. Chlorophyll is the pigment that absorbs sunlight in photosynthesis.
7. Oxygen is released during the light reactions of photosynthesis.
8. The second stage of photosynthesis is called the Calvin cycle.

Answer:

1. Carbon - dioxide
2. Proton gradient
3. An organism that can produce its own food using light, water, carbon - dioxide, or other chemicals
4. Light
5. ATP and NADPH
6. Chlorophyll
7. Light reactions
8. Calvin cycle