The Question is from neet-botany biomolecules-biology , and it was created by the author NISHANTH

Question

Which of the following is NOT a function of cardiolipin?

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Cardiolipin function in mitochondria
 **Related Topics**: Mitochondrial membrane structure, respiratory chain, apoptosis
 **Prerequisites**: Basic understanding of cell membranes, mitochondria, and apoptosis.
## SOLUTION PATHWAY
**Given Information**:
  The question asks to identify a non-function of cardiolipin.
  Options: Stabilizing respiratory chain complexes, facilitating cristae formation, major component of cell membrane fluidity, apoptosis regulation.
**Method & Steps**:
 1. Analyze each option's relationship with cardiolipin.
  Reasoning: Cardiolipin is a unique phospholipid predominantly found in the inner mitochondrial membrane.  Its specific structure and properties contribute to several crucial mitochondrial functions.
 2. Evaluate each option for accuracy.
  Working:
  * **Option A (Stabilizing the structure of respiratory chain complexes):** Cardiolipin plays a vital role in stabilizing the structure and function of respiratory chain complexes (complexes I-IV) within the inner mitochondrial membrane.  This is a known function.
  * **Option B (Facilitating mitochondrial cristae formation):** The unique shape and interactions of cardiolipin contribute to the formation of the cristae, the infoldings of the inner mitochondrial membrane that increase surface area for respiration. This is a known function.
  * **Option C (Major component of cell membrane fluidity):** While cardiolipin affects membrane fluidity within the mitochondria, it is NOT a major component of the general cell membrane (plasma membrane). The plasma membrane primarily consists of other phospholipids like phosphatidylcholine and phosphatidylserine.
  * **Option D (Apoptosis regulation):** Cardiolipin is involved in the regulation of apoptosis (programmed cell death) through its interaction with pro-apoptotic proteins.
 3. Identify the incorrect option.
  Result: Option C is the only statement that is not a known function of cardiolipin.
  Verification:  Referencing reliable biology textbooks and research articles confirms that cardiolipin's primary role is within the mitochondrial inner membrane.
## OPTION ANALYSIS
A ✓: Cardiolipin is essential for stabilizing respiratory chain complexes in the inner mitochondrial membrane.
B :x: Cardiolipin is crucial for the formation of cristae, the folded structures of the inner mitochondrial membrane.
C :x: Cardiolipin is primarily located in the inner mitochondrial membrane, not the cell membrane.  It does influence membrane fluidity within the mitochondria, but it's not a major component of the cell membrane's fluidity.
D :x: Cardiolipin's role in apoptosis regulation is well-documented.
## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the location of cardiolipin: Students might incorrectly associate cardiolipin with the outer cell membrane instead of the inner mitochondrial membrane.
   How to avoid:  Focus on the specific localization of cardiolipin to the mitochondrial inner membrane.
  2.Overgeneralizing cardiolipin's role in membrane fluidity: While it does affect fluidity within the mitochondria, it is not a primary determinant of general cell membrane fluidity.
   How to avoid: Learn the specific roles of different phospholipids in various membranes.
 **Quick Tips**:
  1.Remember the key location: Cardiolipin is primarily found in the inner mitochondrial membrane.
  2.Associate cardiolipin with mitochondrial function:  It's a crucial component for energy production and apoptosis.

NISHANTH · Answer

Stabilizing the structure of respiratory chain complexes

NISHANTH · Answer

Facilitating mitochondrial cristae formation

NISHANTH · Answer

The correct Option is "Major component of cell membrane fluidity"

NISHANTH · Answer

Apoptosis regulation

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