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Cells are enclosed by a plasma membrane composed of _____ and proteins.
- a)Carbohydrates
- b)Nucleic acids
- c)Lipids
- d)Enzymes
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Cells are enclosed by a plasma membrane composed of _____ and proteins...
Cells are enclosed by a plasma membrane composed of lipids and proteins. The plasma membrane regulates the movement of materials between the interior of the cell and the outer environment.
Most Upvoted Answer
Cells are enclosed by a plasma membrane composed of _____ and proteins...
Understanding the Plasma Membrane
The plasma membrane is a crucial component of all cells, acting as a barrier and a gateway for substances entering and leaving the cell.
Composition of the Plasma Membrane
- The plasma membrane is primarily composed of lipids and proteins.
- The main type of lipid found in the membrane is phospholipids, which form a bilayer.
- This bilayer structure creates a semi-permeable membrane that allows certain molecules to pass while keeping others out.
Role of Lipids
- Phospholipids have a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.
- This unique structure helps maintain the integrity of the cell, providing a flexible yet stable environment.
Role of Proteins
- Embedded within the lipid bilayer are various proteins that serve multiple functions:
- Transport proteins facilitate the movement of substances across the membrane.
- Receptor proteins allow the cell to receive signals from the environment.
- Enzymatic proteins can catalyze reactions directly at the membrane surface.
Additional Components
- Carbohydrates are also present, often attached to proteins or lipids, forming glycoproteins and glycolipids, which play roles in cell recognition and signaling.
- While nucleic acids and enzymes are vital for cell function, they are not primary components of the plasma membrane.
In summary, the correct answer is C) Lipids, as they are fundamental to the structure and function of the plasma membrane, working alongside proteins to create a dynamic and functional barrier for the cell.
The plasma membrane is a crucial component of all cells, acting as a barrier and a gateway for substances entering and leaving the cell.
Composition of the Plasma Membrane
- The plasma membrane is primarily composed of lipids and proteins.
- The main type of lipid found in the membrane is phospholipids, which form a bilayer.
- This bilayer structure creates a semi-permeable membrane that allows certain molecules to pass while keeping others out.
Role of Lipids
- Phospholipids have a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.
- This unique structure helps maintain the integrity of the cell, providing a flexible yet stable environment.
Role of Proteins
- Embedded within the lipid bilayer are various proteins that serve multiple functions:
- Transport proteins facilitate the movement of substances across the membrane.
- Receptor proteins allow the cell to receive signals from the environment.
- Enzymatic proteins can catalyze reactions directly at the membrane surface.
Additional Components
- Carbohydrates are also present, often attached to proteins or lipids, forming glycoproteins and glycolipids, which play roles in cell recognition and signaling.
- While nucleic acids and enzymes are vital for cell function, they are not primary components of the plasma membrane.
In summary, the correct answer is C) Lipids, as they are fundamental to the structure and function of the plasma membrane, working alongside proteins to create a dynamic and functional barrier for the cell.
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Cells are enclosed by a plasma membrane composed of _____ and proteins.a)Carbohydratesb)Nucleic acidsc)Lipidsd)EnzymesCorrect answer is option 'C'. Can you explain this answer? for Grade 9 2025 is part of Grade 9 preparation. The Question and answers have been prepared according to the Grade 9 exam syllabus. Information about Cells are enclosed by a plasma membrane composed of _____ and proteins.a)Carbohydratesb)Nucleic acidsc)Lipidsd)EnzymesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Grade 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Cells are enclosed by a plasma membrane composed of _____ and proteins.a)Carbohydratesb)Nucleic acidsc)Lipidsd)EnzymesCorrect answer is option 'C'. Can you explain this answer?.
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