O Level5129_w25_qp_21Written

Combined Science 5129/21 — October/November 2025

Paper 2 Theory (variant 1)

Question paper Mark scheme

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For the whole October/November 2025 seriesGrade thresholds

Grade boundaries for 5129/21

Grade	A	B	C	D	E
Marks	51	40	28	24	19

Minimum raw mark out of 80, from Cambridge's October/November 2025 grade thresholds. Cambridge sets A* only for the whole subject.

Also in October/November 20255129/11Paper 1 Multiple Choice 5129/12Paper 1 Multiple Choice 5129/22Paper 2 Theory 5129/31Paper 3 Experimental Skills and Investigations 5129/32Paper 3 Experimental Skills and Investigations

Paper 2 Theory — other years5129/22October/November 2025 5129/21May/June 2025 5129/22May/June 2025 5129/21October/November 2024 5129/22October/November 2024 5129/21May/June 2024 5129/22May/June 2024 5129/21October/November 2023 All Combined Science papers →