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DP IB Biology: SL

Topic Questions

Home / IB / Biology: SL / DP / Topic Questions / 1. Cell Biology / 1.3 Cells: Membrane Structure & Transport / Multiple Choice: Paper 1


1.3 Cells: Membrane Structure & Transport

Question 1

Marks: 1

Which row correctly labels this diagram of a cell surface membrane?

Cell membrane structure MCQ

  Cholesterol Glycoprotein Glycolipid Protein Phospholipid
A. 3 2 4 1 5
B. 5 3 2 4 1
C. 1 4 2 3 5
D. 5 2 4 3 1
    Choose your answer
      

    Question 2

    Marks: 1

    What is the main function of cholesterol in the cell surface membrane?

    • To provide hydrophilic channels.

    • To regulate membrane fluidity.

    • To assist active transport.

    • To assist cell adhesion.

    Choose your answer
      

    Question 3

    Marks: 1

    Which of the following correctly describes the model of membrane structure that is now widely accepted?

    • A phospholipid bilayer with a series of proteins that are free to move around within the membrane.

    • A phospholipid bilayer.

    • A phospholipid bilayer with a layer of protein on either side.

    • A phospholipid bilayer with a series of proteins in fixed positions throughout.

    Choose your answer
      

    Question 4

    Marks: 1

    Which of the statements about membrane fluidity is correct?

    • The higher the proportion of unsaturated fatty acid tails in a membrane, the higher the membrane fluidity.

    • Cholesterol can restrict the motion of the molecules in a membrane, increasing membrane fluidity.

    • Cells do not need to regulate membrane fluidity.

    • The lower the proportion of unsaturated fatty acid tails in a membrane, the higher the membrane fluidity.

    Choose your answer
      

    Question 5

    Marks: 1

    Which of the following modes of transport is not an example of active or bulk transport?

    • Water moving through a partially permeable membrane.

    • Phagocytosis of a pathogen.

    • Exocytosis.

    • Endocytosis.

    Choose your answer
      
    Key Concepts
    Bulk Transport