The Question is from neet-botany plant-kingdom , and it was created by the author Mr. NARESH KUMAR K

Question

Certain marine brown algae contain algin, which is commercially important.  Algin is a type of:

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Types of phycocolloids
 **Related Topics**: Marine algae, polysaccharides, commercial applications of algae
 **Prerequisites**: Basic knowledge of different types of algae and their components.
## SOLUTION PATHWAY
**Given Information**:
  Algin is found in marine brown algae and is commercially important.
**Method & Steps**:
 1. Identify the type of molecule algin is.
  Reasoning: Algin is a polysaccharide extracted from brown algae.  It's a type of phycocolloid.
  Formula/Rule: N/A
 2. Eliminate incorrect options.
  Working: Carrageenan, agar, and floridean starch are all different types of phycocolloids, but they are not found in brown algae. Carrageenan comes from red algae, agar from red algae, and floridean starch is a storage polysaccharide in red algae.
  Key Point: Different types of algae contain different types of phycocolloids.
 3. Identify the correct option.
  Result: Algin is a phycocolloid.
  Verification: The definition of phycocolloid aligns with the properties and source of algin.
 ## OPTION ANALYSIS
A :x: Carrageenan is a phycocolloid found in red algae, not brown algae.
B :x: Agar is a phycocolloid found in red algae, not brown algae.
C :x: Floridean starch is a storage polysaccharide found in red algae, not brown algae.
D ✓: Phycocolloid is a general term for a group of polysaccharides extracted from seaweed, and algin fits this description. 
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the sources of different phycocolloids: Remembering that carrageenan and agar are from red algae while algin is from brown algae is crucial.
  2.Failing to understand the broad category of phycocolloids: Recognizing that algin is a specific type within the larger group of phycocolloids.
 **Quick Tips**:
  1.Use mnemonics to remember the source of each phycocolloid (e.g., CARrageenan from Red algae).
  2.Focus on the defining characteristics of phycocolloids (water-soluble polysaccharides from algae).

Mr. NARESH KUMAR K · Answer

Carrageenan

Mr. NARESH KUMAR K · Answer

Agar

Mr. NARESH KUMAR K · Answer

Floridean starch

Mr. NARESH KUMAR K · Answer

The correct Option is "Phycocolloid"

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