NEET 2000 · Class 11

Photosynthesis in Higher Plants

The first step for initiation of photosynthesis will be

  1. (A)photolysis of water
  2. (B)excitement of chlorophyll molecules due to absorption of light
  3. (C)ATP formation
  4. (D)glucose formation

The NCERT line that answers it

Verbatim line

In photosystem II the reaction centre chlorophyll *a* absorbs 680 nm wavelength of red light causing electrons to become excited and jump into an orbit farther from the atomic nucleus.

Chapter
Photosynthesis in Higher Plants
Section
11.6 THE ELECTRON TRANSPORT
Page
7
Words matched
30 of 30

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

75, emb=0.9356, combined=0.8614). Verified: high — The span explicitly states that chlorophyll molecules absorb light, causing electrons to become excited, which directly matches option B's description of 'excitement of chlorophyll molecules due to absorption of light' as the first step in initiating photosynthesis.

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