The Question is from neet-botany plant-kingdom , and it was created by the author D VINOD

Question

Which of the following is the major pigment found in Phaeophyceae?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Pigmentation in Algae
 **Related Topics**: Photosynthesis, Algae classification, Accessory pigments
 **Prerequisites**: Basic understanding of photosynthetic pigments and algal groups.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the major pigment in Phaeophyceae (brown algae).
**Method & Steps**:
 1. Identify Phaeophyceae:
  Reasoning: Phaeophyceae is a class of brown algae.  Brown algae are characterized by their brown color, which arises from their pigment composition.
 2. Identify the major pigment:
  Working: The major pigment responsible for the brown color in Phaeophyceae is fucoxanthin.  While chlorophyll a is present, fucoxanthin is the dominant pigment that masks the green color of chlorophyll a.
  Key Point:  Fucoxanthin is a carotenoid pigment that absorbs light in the blue-green region of the spectrum, which penetrates deeper into water than red light. This is an adaptation for life in deeper waters.
 3. Select the correct option:
  Result: Fucoxanthin is the correct answer.
  Verification:  The characteristic brown color of brown algae directly points to fucoxanthin as the major pigment.
 ## OPTION ANALYSIS
A :x: Chlorophyll a is present in Phaeophyceae, but it is not the major pigment.
B :x: Phycoerythrin is the major pigment in Rhodophyceae (red algae).
C :x: Phycocyanin is the major pigment in Cyanobacteria and some other algal groups.
D ✓: Fucoxanthin is the major pigment in Phaeophyceae, giving them their characteristic brown color.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing Phaeophyceae with other algal groups (e.g., Chlorophyceae, Rhodophyceae): Carefully review the characteristic pigments of different algal classes.
  2.Focusing solely on chlorophyll a: Remember that accessory pigments play a crucial role in determining the overall color and photosynthetic efficiency of algae.
 **Quick Tips**:
  1.Associate brown color with fucoxanthin.
  2.Remember the mnemonic:  'Phaeo' sounds like 'brown', associating Phaeophyceae with brown color and fucoxanthin.

D VINOD · Answer

Chlorophyll a

D VINOD · Answer

Phycoerythrin

D VINOD · Answer

Phycocyanin

D VINOD · Answer

The correct Option is "Fucoxanthin"

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