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

Question

The protein-rich storage bodies found within the chloroplasts of *Chlamydomonas* are crucial for survival under stressful conditions. What is the specific name for these structures, and what is their primary composition?

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [Option A]
## CONCEPT FRAMEWORK
	**Primary Concept**: Structure and function of chloroplasts in *Chlamydomonas*
	**Related Topics**: Photosynthesis, plant cell structure, stress response in algae
	**Prerequisites**: Understanding of chloroplast anatomy and function
## SOLUTION PATHWAY
**Given Information**:
		- Organism: *Chlamydomonas*
		- Structures within chloroplasts: protein-rich storage bodies
**Method & Steps**:
	1. Identify the structures within chloroplasts of *Chlamydomonas*.
		Reasoning: These structures are known for their role in storing proteins and carbohydrates.
		Formula/Rule: The key structures are identified as pyrenoids, which are involved in storing starch and enzymes necessary for carbon fixation.
	2. Determine the primary composition of the identified structures.
		Working: Pyrenoids are primarily composed of the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) and starch granules.
		Key Point: The presence of RuBisCO is crucial for the process of photosynthesis, particularly in carbon fixation.
	3. Conclude the specific name and composition.
		Result: The protein-rich storage bodies are called pyrenoids, composed of RuBisCO and starch.
		Verification: Cross-referencing with botanical texts confirms the role and composition of pyrenoids in algae.
## OPTION ANALYSIS
[A] ✓: The option correctly identifies the structures as pyrenoids and their composition as RuBisCO and starch, which is accurate.
[B] :x: Eyespots are sensory structures involved in light detection, not protein storage bodies.
[C] :x: Vacuoles primarily store water and ions, but do not specifically refer to the protein-rich structures in chloroplasts.
[D] :x: Flagella are motility structures, not related to the storage of proteins in chloroplasts.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing pyrenoids with other chloroplast structures: Remember that pyrenoids specifically relate to protein and starch storage.
		2. Misidentifying the function of eyespots or vacuoles: Clarify their distinct functions in *Chlamydomonas*.
	**Quick Tips**:
		1. Remember 'pyrenoids' as 'protein and starch' storage in chloroplasts.
		2. Use mnemonic devices to differentiate between structures: think of 'P' for pyrenoids and 'Protein'.

K SURESH KUMAR · Answer

The correct Option is "Pyrenoids; RuBisCO and starch"

K SURESH KUMAR · Answer

Eyespots; carotenoids and lipids

K SURESH KUMAR · Answer

Vacuoles; water and ions

K SURESH KUMAR · Answer

Flagella; tubulin and dynein

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