Cell Membrane Structure and Composition

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What is the main function of lipids in the cell membrane?

To regulate the cell's energy production

To assist in the formation of amino acids

To monitor and maintain the cell's chemical climate

To give membranes their flexibility (correct)

What is the role of cholesterol in animal cell membranes?

Prevents phospholipids from being too closely packed together (correct)

Facilitates DNA transcription

Regulates the cell's water balance

Assists in cellular respiration

Which type of protein helps cells communicate with their external environment?

Receptor proteins (correct)

Structural proteins

Enzymatic proteins

Transport proteins

What is the composition of the lipid bilayer in cell membranes?

Double layer of amphipathic phospholipids Signup and view all the answers

What is the significance of phospholipids being considered amphipathic molecules?

They have both hydrophilic and hydrophobic parts Signup and view all the answers

How do proteins contribute to the cell membrane's function?

By helping to maintain the cell's chemical climate Signup and view all the answers

What is the main function of cholesterol in animal cell membranes?

To maintain membrane fluidity by preventing phospholipids from packing too closely together Signup and view all the answers

What is the significance of having both hydrophilic and hydrophobic parts in phospholipids?

It enables the phospholipids to form a semi-permeable barrier Signup and view all the answers

Which type of proteins help to give the cell support and shape?

Structural proteins Signup and view all the answers

What is the role of lipids in providing flexibility to cell membranes?

Lipids help to maintain the fluidity of the cell membrane Signup and view all the answers

What is the composition of the lipid bilayer in cell membranes?

Composed of amphipathic phospholipid molecules Signup and view all the answers

How do proteins contribute to maintaining the cell's chemical climate?

By monitoring and maintaining the cell's chemical climate Signup and view all the answers

What is the role of amphipathic phospholipids in cell membranes?

To allow certain molecules to diffuse across the membrane Signup and view all the answers

How do receptor proteins help cells communicate with their external environment?

By recognizing and binding to external signaling molecules Signup and view all the answers

3

The first option in question 10 Signup and view all the answers

What is the primary composition of the cell membrane?

Lipids and proteins Signup and view all the answers

What type of membrane forms a stable barrier between two aqueous compartments?

Cell membrane Signup and view all the answers

Which part of the phospholipids plays a vital role in protecting the integrity of the interior of the cell?

Hydrophobic tail Signup and view all the answers

What is the main function of cholesterol in animal cell membranes?

Providing flexibility to the cell membrane Signup and view all the answers

What is the role of amphipathic phospholipids in cell membranes?

Allowing only selected substances into the cell Signup and view all the answers

Which type of protein helps to give the cell support and shape?

Structural proteins Signup and view all the answers

What is the significance of having both hydrophilic and hydrophobic parts in phospholipids?

It facilitates movement of molecules across membranes Signup and view all the answers

Cell Membrane Structure and Composition

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Questions and Answers

What is the main function of lipids in the cell membrane?

What is the role of cholesterol in animal cell membranes?

Which type of protein helps cells communicate with their external environment?

What is the composition of the lipid bilayer in cell membranes?

What is the significance of phospholipids being considered amphipathic molecules?

How do proteins contribute to the cell membrane's function?

What is the main function of cholesterol in animal cell membranes?

What is the significance of having both hydrophilic and hydrophobic parts in phospholipids?

Which type of proteins help to give the cell support and shape?

What is the role of lipids in providing flexibility to cell membranes?

What is the composition of the lipid bilayer in cell membranes?

How do proteins contribute to maintaining the cell's chemical climate?

What is the role of amphipathic phospholipids in cell membranes?

How do receptor proteins help cells communicate with their external environment?

3

What is the primary composition of the cell membrane?

What type of membrane forms a stable barrier between two aqueous compartments?

Which part of the phospholipids plays a vital role in protecting the integrity of the interior of the cell?

What is the main function of cholesterol in animal cell membranes?

What is the role of amphipathic phospholipids in cell membranes?

Which type of protein helps to give the cell support and shape?

What is the significance of having both hydrophilic and hydrophobic parts in phospholipids?

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