Class 11 · Plant Kingdom

Floridean Starch in Red Algae — NEET Biology

✅ Asked in NEET 2020
✅ NEET 2020 PYQ

Floridean starch has structure similar to:

QuestionNEET 2020

Floridean starch has structure similar to:

Answer & NCERT explanation

Correct answer: A Amylopectin and glycogen

Floridean starch, found in red algae, has a structure similar to amylopectin and glycogen. According to NCERT, it is highly branched like amylopectin (a component of starch) and glycogen (animal storage polysaccharide). This branched structure allows efficient storage and quick mobilization of glucose units when needed. The other options contain unrelated compounds that don't share structural similarities with floridean starch.

Read more NCERT concept on the PYQ

📖 NCERT Source

The red thalli of most of the red algae are multicellular. Some of them have complex body organisation. The food is stored as floridean starch which is very similar to amylopectin and glycogen in structure.

NCERT Biology · Class 11 · Chapter 3 · Paragraph 16
How NTA Uses This Concept

Red algae store energy as floridean starch, a polysaccharide structurally similar to amylopectin (plant starch) and glycogen (animal starch). NTA tests this to check if students understand storage compounds across different organisms. The common mistake is confusing floridean starch with cellulose (structural) or thinking it's unique to red algae only. Remember: floridean starch is the typical storage compound in red algae, resembles amylopectin and glycogen in structure, and helps distinguish red algae metabolism. This concept appears in comparative algal nutrition and could be tested through matching storage compounds to organism types.

❓ Frequently Asked Questions
What does NCERT say about red thalli most red?
The red thalli of most of the red algae are multicellular. Some of them have complex body organisation.
Has this concept appeared in NEET?
Yes — appeared in NEET 2020. States floridean starch is similar to amylopectin and glycogen
Which chapter is this from?
Plant Kingdom, Class 11 NCERT Biology.

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