Biology 9700/22 May June 2021 | Cambridge AS Level Past Papers With Mark Scheme
- Mitosis stages identification: cell E and cell F.
- Microtubules function in mitosis: chromosome movement.
- DNA semi-conservative replication: unwinding, enzyme roles, telomeres.
- Phloem and xylem transport: sugar source to sink, water and mineral ion needs.
- Hormone signaling: steroid hormones, receptor interactions, gene expression.
- Immune system disorders: myasthenia gravis, HIV/AIDS, antibiotic preventive measures.

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