"Explain" questions — OCR A-Level Biology A (H420)
136 questions · biology · View as Markdown
How to answer
WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.
Sample questions
- Explain how the structure of a sieve tube element is adapted to allow the mass flow of assimilates through the phloem.
- A research team used CRISPR-Cas9 to introduce a loss-of-function mutation into a gene encoding a transcription factor in…
- Explain why the tertiary structure of an enzyme is essential for its function, referring to the role of bonds that maint…
- Explain how the structure of a sieve tube element is adapted for the mass flow of assimilates through the phloem.
- Explain how the structure of a sieve tube element is adapted for its function in the phloem.
- Explain why totipotency in plant cells makes it possible to produce large numbers of genetically identical plants from a…
- Explain why a restriction endonuclease and DNA ligase are both required when inserting a human gene into a bacterial pla…
- Explain why a habitat with a high species richness does not necessarily have a high biodiversity index.