The Question is from neet-botany , and it was created by the author K SURESH KUMAR

Question

The stored food material in Phaeophyceae is:

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**:  Classification and characteristics of algae.
 **Related Topics**:  Phaeophyceae (brown algae), carbohydrate storage in algae, types of storage polysaccharides.
 **Prerequisites**: Basic understanding of algal groups and their distinguishing features.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the stored food material in Phaeophyceae (brown algae).
**Method & Steps**:
 1. Identify Phaeophyceae:
  Reasoning: Phaeophyceae are a class of brown algae characterized by their brown color due to the pigment fucoxanthin.
 2. Recall the characteristic stored food material:
  Working: Brown algae primarily store food as mannitol (a sugar alcohol) and laminarin (a β-1,3-linked glucan).
 3. Eliminate incorrect options:
  Reasoning: Starch is the main storage carbohydrate in many plants and some algae, but not brown algae. Floridean starch is a storage carbohydrate specific to Rhodophyceae (red algae). Paramylon is a storage polysaccharide found in Euglenoids.
 3. Final Step:
  Result: Mannitol and Laminarin are the correct stored food materials in Phaeophyceae.
  Verification: This aligns with established knowledge about brown algae's biochemistry.
 ## OPTION ANALYSIS
A :x: Starch is the storage product of many plants but not Phaeophyceae.
B ✓: Mannitol and Laminarin are the characteristic storage products of Phaeophyceae.
C :x: Floridean starch is found in Rhodophyceae (red algae).
D :x: Paramylon is a storage product of Euglenoids.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the storage products of different algal groups: Remembering the specific storage products for each algal class (e.g., Chlorophyceae, Phaeophyceae, Rhodophyceae) is crucial.
  2.Generalizing storage products:  Not all algae store the same carbohydrates; each group has its unique storage mechanisms.
 **Quick Tips**:
  1.Associate the color of the algae with their storage product (brown algae – mannitol and laminarin).
  2.Create a table summarizing the storage products for different algal groups.

K SURESH KUMAR · Answer

Starch

K SURESH KUMAR · Answer

The correct Option is "Mannitol and Laminarin"

K SURESH KUMAR · Answer

Floridean Starch

K SURESH KUMAR · Answer

Paramylon

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