Structure of the Cell Membrane (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What are the two structural components of a phospholipid molecule?
What are the two structural components of a phospholipid molecule?
Hydrophilic head & hydrophobic tails
Why do phospholipids spontaneously form bilayers in aqueous environments?
Why do phospholipids spontaneously form bilayers in aqueous environments?
Due to their amphipathic nature
Which proteins extend completely across the phospholipid bilayer?
Which proteins extend completely across the phospholipid bilayer?
Transmembrane proteins
What do carrier proteins do in the cell membrane?
What do carrier proteins do in the cell membrane?
Bind molecules & change shape to transport
How does cholesterol affect membrane fluidity at elevated temperatures?
How does cholesterol affect membrane fluidity at elevated temperatures?
Decreases membrane fluidity
Which type of cell membranes primarily contain cholesterol?
Which type of cell membranes primarily contain cholesterol?
Animal cell membranes
Where do the carbohydrate chains of glycolipids face?
Where do the carbohydrate chains of glycolipids face?
Outward toward extracellular environment
What is the primary function of glycoproteins in cell membranes?
What is the primary function of glycoproteins in cell membranes?
Cell-surface receptors for signalling
Why can't polar molecules easily cross the phospholipid bilayer?
Why can't polar molecules easily cross the phospholipid bilayer?
Can't traverse non-polar hydrophobic interior
What does 'fluid' mean in the fluid-mosaic model?
What does 'fluid' mean in the fluid-mosaic model?
Phospholipids move relative to each other