Question

Photosynthesis: 6 CO2 + 6 H20+ Energy-→ C,H1206 + 6 O2 Respiration: C,H 1206 + 6 O2-→ 6 co, + 6 H2O+ Energy Figure 8-2. Summary equations for photosynthesis and cellular respiration. dioxide Respiration Photosynthesis OHayden-McNeil. LLC Figure 8-3. Interplay between celar repiration and photoynthesis. The light reactions take place in the highly convoluted thylakoid membranes that are located within the chloroplasts. Chlorophyll is the predominant green pigment that is embedded within the thylakoid membranes and concentrated in special collections called photosystems. During the light reactions, chlorophyll pigments absorb energy from the sun and the high energy products of ATP and NADPH are produced. The by-product of oxygen gas (O2) is also produced from the splitting of water. The ATP and NADPH produced during the light reactions feed directly into the Calvin cycle (light-independent reactions), which takes place in the stroma of the chloroplasts. During this second stage, carbon dioxide (CO2) is reduced to sugar (Figure 8-4).
Lab 8 - photosynthesis:

What hypothesis is being tested in this exercise?

		1. Brighter lights produce more glucose during photosynthesis.
		2. Carbon dioxide is required for photosynthesis to occur.
		3. Brighter lights increase the rate of photosynthesis.
		4. NADPH is a product of the light reactions of photosynthesis.

Answer 1

4.NADPH is a product of the light reactions if photosynthesis .

It is produced when chlorophyll pigment absorb energy from sun.