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Photosynthesis in Higher Plants
Photosynthetic Pigments
3 questions from 3 papers, each with its answer.
- questions
- 3
- papers
- 3
- years asked, 2017–2026
- 1 of 10
- of Photosynthesis in Higher Plants
- 3.3%
Appears in
Concepts tested
- Chlorophyll traps light
- Magnesium in chlorophyll
- Pigment Chromatography
All Questions
2025 1 question
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Match List-I with List-II.
Pick the matching item from Column II for each row.
Column I
- A. Chlorophyll a
- B. Chlorophyll b
- C. Xanthophylls
- D. Carotenoids
Column II
- I. Yellow-green
- II. Yellow
- III. Blue-green
- IV. Yellow to Yellow-orange
Correct answer: A → III, B → I, C → II, D → IV
A-III, B-I, C-II, D-IV.
Chromatographic colors of leaf pigments: Chlorophyll a is blue-green (III), Chlorophyll b is yellow-green (I), Xanthophylls are yellow (II), and Carotenoids range from yellow to yellow-orange (IV).
2003 AIPMT 1 question
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Which element is located at the centre of the porphyrin ring in chlorophyll : -A chlorophyll molecule has a tetrapyrrole (porphyrin) head and a long phytol tail.
A magnesium atom is located at the centre of the porphyrin ring, bonded to four nitrogen atoms.
Magnesium deficiency therefore causes chlorosis (yellowing of leaves).
(In haem of haemoglobin, the central atom is iron.)
So the element at the centre of the porphyrin ring of chlorophyll is magnesium.
2002 AIPMT 1 question
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Which of the following absorb light energy for photosynthesis : -Chlorophyll (mainly chlorophyll a, with chlorophyll b and accessory pigments) present in the thylakoids absorbs light energy, mainly in the blue and red regions.
This energy excites electrons in the reaction centre and drives the light reaction.
Water is split to provide electrons, $O_2$ is a by-product, and RuBP is the $CO_2$ acceptor; none of these absorbs light for photosynthesis.
So chlorophyll absorbs light energy for photosynthesis.