Practice IB Biology Topic 1.3 Membrane Structure with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 1.3 Membrane Structure and mirrors Paper 1A, 1B, 2 style where relevant.
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Which of the following characteristics found in a structure necessarily indicates that it is alive?
What can the extracellular matrix of cells be made of?
I. Polysaccharide II. Glycoprotein III. Phospholipid
Which pair of features is correct for both a human liver cell and an Escherichia coli cell?
| Human liver cell | Escherichia coli cell | |
|---|---|---|
| A. | contains DNA associated with protein | contains naked DNA |
| B. | has 70S ribosomes | has 80 S ribosomes |
| C. | contains mitochondria | contains mitochondria |
| D. | contains DNA enclosed by a membrane | contains DNA associated with protein |
How is facilitated diffusion in axons similar to active transport?
Draw a labelled diagram of the molecular structure of DNA, comprising of four nucleotides.
Outline the therapeutic use of stem cells.
Giving one specific example, discuss genetic modification in organisms including the potential benefits and possible harmful effects.