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

Question

The 'glycolate metabolism' pathway in some Chlorophyceae involves a unique organelle. Which one is it, and what is its primary function in this context?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Photorespiration and Glycolate Metabolism
 **Related Topics**: Plant Cell Organelles, Chlorophyceae (Green Algae), Metabolic Pathways
 **Prerequisites**: Basic understanding of photosynthesis, cellular respiration, and the roles of different organelles in plant cells.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the organelle involved in glycolate metabolism in Chlorophyceae (a group of green algae).
  Glycolate metabolism is a crucial part of photorespiration.
**Method & Steps**:
 1. Identify the key process: Glycolate metabolism is a part of photorespiration, a process that occurs when Rubisco (an enzyme in the Calvin cycle) mistakenly binds to oxygen instead of carbon dioxide.
  Reasoning: Photorespiration involves several organelles to process the byproduct glycolate.
  Formula/Rule: N/A
 2. Determine the organelle responsible:  The peroxisome plays a central role in glycolate metabolism.  It's where glycolate is oxidized to glyoxylate.
  Working: The peroxisome contains enzymes necessary for the oxidation of glycolate, a crucial step in preventing the accumulation of toxic compounds.
  Key Point: Mitochondria and chloroplasts also play roles in photorespiration, but the peroxisome is the primary site for glycolate oxidation.
 3. Identify the primary function: The primary function of the peroxisome in glycolate metabolism is the oxidation of glycolate.
  Result: Peroxisome; glycolate oxidation
  Verification: This aligns with the established knowledge of photorespiration and the roles of different organelles.
 ## OPTION ANALYSIS
A ✓: Peroxisome; glycolate oxidation: This is the correct answer. Peroxisomes are involved in the oxidation of glycolate during photorespiration.
B :x: Mitochondrion; ATP synthesis: Mitochondria are primarily involved in ATP synthesis, not the initial steps of glycolate metabolism.
C :x: Chloroplast; CO2 fixation: Chloroplasts are the site of CO2 fixation during photosynthesis, but not the primary site for glycolate processing.
D :x: Golgi apparatus; protein modification: The Golgi apparatus is involved in protein modification and transport, not directly in glycolate metabolism.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the roles of peroxisomes with those of mitochondria or chloroplasts: Understanding the specific functions of each organelle is crucial.
  2.Overlooking the importance of photorespiration in the context of glycolate metabolism: Photorespiration is the pathway where glycolate is produced and subsequently processed.
 **Quick Tips**:
  1.Remember the key enzymes in glycolate metabolism are located in peroxisomes.
  2.Associate peroxisomes with detoxification and oxidation reactions in plants.

B VENKAT · Answer

The correct Option is "Peroxisome; glycolate oxidation"

B VENKAT · Answer

Mitochondrion; ATP synthesis

B VENKAT · Answer

Chloroplast; CO2 fixation

B VENKAT · Answer

Golgi apparatus; protein modification

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