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

Question

Cell membrane in animals is composed mainly of the molecules of?

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Cell membrane structure and composition
	**Related Topics**: Lipids, proteins, carbohydrates, nucleic acids, fluid mosaic model
	**Prerequisites**: Basic biological molecules and their functions
## SOLUTION PATHWAY
**Given Information**:
	The question asks about the primary component of animal cell membranes.
**Method & Steps**:
	1. Recall the fluid mosaic model of the cell membrane.
		Reasoning: This model describes the cell membrane as a dynamic structure composed primarily of a lipid bilayer with embedded proteins.
	2. Identify the major lipid component of the cell membrane.
		Working:  The lipid bilayer is primarily composed of phospholipids.
		Key Point: Phospholipids have a hydrophilic head and hydrophobic tails, which allows them to form the bilayer structure in an aqueous environment.
	3. Consider the roles of other biological molecules in the membrane.
		Result: While proteins and carbohydrates are also present in the cell membrane, they are not the primary structural components. Nucleic acids are not a major component of cell membranes.
		Verification: The phospholipid bilayer forms the structural backbone of the cell membrane, providing a barrier and a platform for other molecules to function.
## OPTION ANALYSIS
[A] ✓: Phospholipids are the main structural component of cell membranes, forming the lipid bilayer.
[B] :x: Carbohydrates are present in the cell membrane, often attached to proteins or lipids (glycoproteins and glycolipids), but they are not the primary component. They play roles in cell recognition and signaling.
[C] :x: Nucleic acids (DNA and RNA) are primarily found within the cell nucleus and cytoplasm, not within the cell membrane structure. They carry genetic information and are involved in protein synthesis.
[D] :x: Proteins are embedded within or associated with the cell membrane, performing various functions such as transport, signaling, and enzymatic activity. However, they are not the main structural element of the membrane.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the roles of different biological molecules in the cell membrane: Remember that phospholipids form the structural backbone, while proteins and carbohydrates have other important functions.
		2. Focusing on the functional components and neglecting the structural components: While proteins are vital for membrane function, phospholipids are the primary structural molecules.
	**Quick Tips**:
		1. Visualize the fluid mosaic model: Imagine the phospholipid bilayer as the 'sea' in which proteins 'float'.
		2. Remember the amphipathic nature of phospholipids: Their hydrophilic heads face the aqueous environment, while the hydrophobic tails face inwards, creating the bilayer structure.

K SURESH KUMAR · Answer

The correct Option is "phospholipids"

K SURESH KUMAR · Answer

carbohydrates

K SURESH KUMAR · Answer

nucleic acids

K SURESH KUMAR · Answer

proteins

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