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

Question

Which of the following is NOT a primary function of cell membrane proteins?

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Cell membrane structure and function
 **Related Topics**: Membrane transport, cell signaling, lipid biosynthesis
 **Prerequisites**: Basic understanding of cell biology and the components of cell membranes.
## SOLUTION PATHWAY
**Given Information**:
  The question asks to identify a function NOT performed by cell membrane proteins.
  Options: Transport, Receptor function, Lipid synthesis, Structural support.
**Method & Steps**:
 1. Analyze each option to determine its relationship to cell membrane proteins.
  Reasoning:  Cell membrane proteins are integral to many functions of the cell membrane.
 2. Identify the option that is NOT a primary function of membrane proteins.
  Working: 
        * **Transporting molecules:** Many membrane proteins act as channels or carriers, facilitating the movement of substances across the membrane.
        * **Acting as receptors:** Receptor proteins bind signaling molecules, initiating intracellular responses.
        * **Synthesizing lipids:** Lipid synthesis primarily occurs in the endoplasmic reticulum, not the cell membrane proteins themselves.  Membrane proteins may be *involved* in the regulation of lipid metabolism but don't directly synthesize lipids.
        * **Providing structural support:** Membrane proteins contribute to the structural integrity and fluidity of the membrane.
 3. Select the option that is not a primary function.
  Result: Option C, synthesizing lipids, is the correct answer.
  Verification:  The other options are well-established functions of cell membrane proteins.
 ## OPTION ANALYSIS
A : ✓: Transporting molecules across the membrane is a major function of membrane proteins (e.g., ion channels, transporters).
B : ✓: Acting as receptors for signaling molecules is a crucial role of membrane proteins (e.g., G-protein coupled receptors).
C : x: Synthesizing lipids is primarily the function of enzymes located in the endoplasmic reticulum and not a direct function of membrane proteins.
D : ✓: Providing structural support to the membrane is a key function of membrane proteins (e.g., anchoring proteins).
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the location of lipid synthesis: Students may mistakenly associate lipid synthesis with the cell membrane itself instead of the endoplasmic reticulum.
  How to avoid: Remember the key organelles involved in lipid synthesis (smooth endoplasmic reticulum).
  2.Overlooking the indirect roles of membrane proteins: Membrane proteins can indirectly influence lipid metabolism but don't directly synthesize lipids.
  How to avoid: Focus on the direct primary functions of membrane proteins.
 **Quick Tips**:
  1.Use the process of elimination: If you are unsure of one function, analyze the others to find the one that is clearly different.
  2.Recall the main roles of membrane proteins: Think about transport, signaling, and structural support.

NISHANTH · Answer

Transporting molecules across the membrane

NISHANTH · Answer

Acting as receptors for signaling molecules

NISHANTH · Answer

The correct Option is "Synthesizing lipids"

NISHANTH · Answer

Providing structural support to the membrane

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