Question

William is developing the model shown below to illustrate the process of photosynthesis. He plans to use the model to explain how photosynthesis transforms both energy and matter.

The model includes a wavy arrow to show light striking the thylakoids. Which label for the wavy arrow would be MOST USEFUL for communicating the role of light in photosynthesis?
A.
Light is radiated from the chloroplast during the light-independent reactions.
B.
Light energy is cycled within the thylakoid.
C.
The chloroplast reflects the green wavelengths of light.
D.
Light is the energy source for converting ADP to ATP, and NADP+ to NADPH.

Answer 1

The most useful label for light in photosynthesis is that it is the energy source for converting ADP to ATP, and NADP+ to NADPH, as it accurately describes its role in the light reactions.

Step-by-step explanation:

The most useful label for the wavy arrow showing light striking the thylakoids in William's photosynthesis model would be: "Light is the energy source for converting ADP to ATP, and NADP+ to NADPH."

This label communicates the role of light as the initiator of the energy conversion processes that take place in the thylakoids of the chloroplast during the light reactions of photosynthesis.

It is through these processes that the light energy is transformed into chemical energy, which is stored in ATP and NADPH.

These molecules are later used in the Calvin cycle to synthesize glucose from carbon dioxide and water.