Question

Consider the following events of photosynthesis.

1. Light energy excites electrons.
2. Water molecules are split.
3. NADPH is formed.

In which locations do each of these events occur?
A. 1. photosystem II
2. photosystem III
3. photosystem I
B. 1. photosystem II
2. photosystem II
3. photosystem I
C. 1. photosystem I
2. photosystem I
3. photosystem II
D. 1. photosystem I
2. photosystem II
3. photosystem II

Answer 1

Stage 2 of B I believe.

Answer 2

There are different photo systems involved in the phenomenon of photosynthesis which are units of protein

The two photo-systems are required for aerobic photosynthesis

Photosystem I

Photosystem II

The photosystem II absorbs energy [ thus light energy excites electron]

In photosystem II splits water molecules are split.

The excited electrons are transferred through cytochrome to photosystem I

In photosystem I NaDPH is formed.

thus answer is

B.

1. photosystem II

2. photosystem II

3. photosystem I