NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Botany
- Chapter
- Photosynthesis in Higher Plants
NEET 2026 · Botany · Photosynthesis in Higher Plants
Which pigment has absorption peak at 700 nm in the photosynthetic...
Which pigment has absorption peak at nm in the photosynthetic reaction centre PS I (P700) ?
Options
- ACarotenoids
- BChlorophyll b
- CChlorophyll a
- DXanthophylls
Correct answer
C. Chlorophyll a
Step-by-step solution
In the light reaction of photosynthesis, the reaction centre of Photosystem I (PS I) consists of a specific molecule of chlorophyll a.
This chlorophyll a molecule has an absorption peak at nm, which is why it is designated as P700.
In contrast, the reaction centre of Photosystem II (PS II) is a chlorophyll a molecule with an absorption peak at nm, known as P680.
Answer: Chlorophyll a
This chlorophyll a molecule has an absorption peak at nm, which is why it is designated as P700.
In contrast, the reaction centre of Photosystem II (PS II) is a chlorophyll a molecule with an absorption peak at nm, known as P680.
Answer: Chlorophyll a