4-mark practice questions — IB DP Biology Higher Level (2023 syllabus)
310 questions · biology · View as Markdown
How to answer
4-mark questions are the shortest levels-of-response band. Aim for four scientific ideas, each in its own short sentence.
Sample questions
- Explain how increasing global temperatures can alter the geographical distribution of terrestrial species and describe t…
- Describe the role of the sugar molecule in the structure of nucleic acids and Explain how its variation between DNA and …
- Explain how the cohesive and adhesive properties of water are essential for its transport in the xylem of plants.
- Explain how cyclic photophosphorylation differs from non-cyclic photophosphorylation in terms of the electron pathway an…
- Explain how the fluid mosaic model accounts for the lateral movement of membrane proteins and discuss why this movement …
- Explain how natural selection acts on variation within a population to bring about evolutionary change over successive g…
- Explain how the structure of prokaryotic ribosomes differs from that of eukaryotic ribosomes, and outline the significan…
- Explain how the chemiosmotic gradient across the inner mitochondrial membrane is established and used to synthesise ATP …