4-mark practice questions — IB DP Biology Standard Level (2023 syllabus)
290 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 the structure of the rough endoplasmic reticulum (rER) is related to its role in the production and processi…
- Explain why DNA replication must occur before mitosis and describe one consequence if replication failed to occur.
- Distinguish between prokaryotic and eukaryotic cells in terms of their internal organisation.
- Explain how the primary structure of a protein determines its three-dimensional shape and, therefore, its function.
- Explain how sex-linked inheritance can result in a phenotypic ratio that differs between males and females in the offspr…
- Explain how the structure of a capillary is adapted to allow the exchange of substances between blood and surrounding ti…
- Explain how the adaptations of a named aquatic insect larva allow it to obtain sufficient oxygen in a fast-flowing, well…
- Explain how non-competitive inhibitors reduce the rate of an enzyme-catalysed reaction.