Question:
What are the accessory pigments that are present in higher plants?
What are the accessory pigments that are present in higher plants?
Updated On: Jun 7, 2022
- Phycocyanins
- Carotenes and xanthophylls
- Carotenoids and anthocyanins
- Phycoerythrins
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The Correct Option is B
Solution and Explanation
Carotenes and xanthophylls are collectively called carotenoids. Carotenoids are yellow, brown orange or reddish pigments usually found in close association of chlorophylls in all photosynthesising cells. They occur in thylakoids and act as accessory pigments by absorbing light energy and transferring it to chlorophyll. They also pick up nascent oxygen and protect chlorophyll form photo-oxidation. Anthocyanins are reddish purple water soluble floavonoid pigments which have no active role in photosynthesis but act as a photoscreen and protect against photoinhibition.
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Concepts Used:
Photosynthesis in Higher Plants
Processes Of Photosynthesis in Higher Plants:
Photosynthesis in higher plants involves the following processes:
- Light Reaction
- Dark Reaction
Light Reaction:
- This phenomenon occurs in the presence of light.
- The pigment absorbs light and produces energy in the form of ATP.
- The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.
Dark Reaction:
This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:
- Calvin Cycle (C3 Cycle)
- C4 Cycle (Hatch and Slack Pathway)