May 2025 Edexcel:
AS Level Biology A
(Salters Nuffield)
8BN0/02 Paper 2
– Development,
Plants and the
Environment –
Merged Question
Paper & Mark
Scheme
, Turn over
May 2025 Edexcel: AS Level Biology A (Salters Nuffield) 8BN0/02 Paper 2 – Development, Plants and
the Environment – Merged Question Paper & Mark Scheme
Exam Resource Summary
The May 2025 Edexcel AS Level Biology A (Salters-Nuffield) 8BN0/02 document merges the official
question paper and mark scheme for Paper 2 – Development, Plants and the Environment. This paper
covers Topics 3 and 4 from the AS Biology A specification, including cell specialization and division,
gene expression and epigenetics, biodiversity, natural resources, plant structure and function, and
sustainability in biological contexts. The merged format provides students with full visibility of examiner
expectations, mark allocation, and question structure. Each question is paired with the official marking
criteria—supporting targeted revision, self-assessment, and the development of rigorous scientific
argumentation, analytical skills, and practical awareness. An essential resource for effective preparation for
the 2025 Edexcel AS Level Biology A Paper 2 examination.
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
AREA
D O NOT WRITE IN THIS
answer, put a line through the box and then mark your new answer with a cross .
1 All living organisms are made of cells.
(a) The image shows an electronmicrograph of an organelle found only in
eukaryotic cells.
A
B
AREA
D O NOT WRITE IN THIS
(Source: © Omikron/SCIENCE PHOTO LIBRARY)
magnification ×44 000
(i) This organelle is not found in prokaryotic cells.
Explain why this type of organelle is present only in eukaryotic cells and not
in prokaryotic cells.
(2)
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. . . ... .. .. ... .. .. ... .. ... .. .. . ......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
AREA
D O NOT WRITE IN THIS
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
(ii) Calculate the width of this organelle from A to B, as shown in the image.
Give your answer in micrometres (µm) to two significant figures.
(2)
. .............................................................. µm
2
■■■■
, (b) The image shows an electronmicrograph of part of a eukaryotic cell.
E
DO NOT WRITE IN THIS AREA
F
G
(Source: © Don Fawcett/SCIENCE PHOTO LIBRARY)
DO NOT WRITE IN THIS AREA
(i) Which row in the table identifies structures E, F and G?
(1)
Structure E Structure F Structure G
A chloroplast centriole nucleus
B chloroplast Golgi apparatus nuclear membrane
C mitochondrion centriole nuclear membrane
D mitochondrion Golgi apparatus nucleus
(ii) Which row of the table shows the processes that involve structures E and F?
(1)
DO NOT WRITE IN THIS AREA
Structure E Structure F
A photosynthesis mitosis
B photosynthesis protein synthesis
C respiration mitosis
D respiration photosynthesis
(Total for Question 1 = 6 marks)
3
■■■■ Turn over
AS Level Biology A
(Salters Nuffield)
8BN0/02 Paper 2
– Development,
Plants and the
Environment –
Merged Question
Paper & Mark
Scheme
, Turn over
May 2025 Edexcel: AS Level Biology A (Salters Nuffield) 8BN0/02 Paper 2 – Development, Plants and
the Environment – Merged Question Paper & Mark Scheme
Exam Resource Summary
The May 2025 Edexcel AS Level Biology A (Salters-Nuffield) 8BN0/02 document merges the official
question paper and mark scheme for Paper 2 – Development, Plants and the Environment. This paper
covers Topics 3 and 4 from the AS Biology A specification, including cell specialization and division,
gene expression and epigenetics, biodiversity, natural resources, plant structure and function, and
sustainability in biological contexts. The merged format provides students with full visibility of examiner
expectations, mark allocation, and question structure. Each question is paired with the official marking
criteria—supporting targeted revision, self-assessment, and the development of rigorous scientific
argumentation, analytical skills, and practical awareness. An essential resource for effective preparation for
the 2025 Edexcel AS Level Biology A Paper 2 examination.
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
AREA
D O NOT WRITE IN THIS
answer, put a line through the box and then mark your new answer with a cross .
1 All living organisms are made of cells.
(a) The image shows an electronmicrograph of an organelle found only in
eukaryotic cells.
A
B
AREA
D O NOT WRITE IN THIS
(Source: © Omikron/SCIENCE PHOTO LIBRARY)
magnification ×44 000
(i) This organelle is not found in prokaryotic cells.
Explain why this type of organelle is present only in eukaryotic cells and not
in prokaryotic cells.
(2)
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. . . ... .. .. ... .. .. ... .. ... .. .. . ......................
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
AREA
D O NOT WRITE IN THIS
. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. . . . ......................
(ii) Calculate the width of this organelle from A to B, as shown in the image.
Give your answer in micrometres (µm) to two significant figures.
(2)
. .............................................................. µm
2
■■■■
, (b) The image shows an electronmicrograph of part of a eukaryotic cell.
E
DO NOT WRITE IN THIS AREA
F
G
(Source: © Don Fawcett/SCIENCE PHOTO LIBRARY)
DO NOT WRITE IN THIS AREA
(i) Which row in the table identifies structures E, F and G?
(1)
Structure E Structure F Structure G
A chloroplast centriole nucleus
B chloroplast Golgi apparatus nuclear membrane
C mitochondrion centriole nuclear membrane
D mitochondrion Golgi apparatus nucleus
(ii) Which row of the table shows the processes that involve structures E and F?
(1)
DO NOT WRITE IN THIS AREA
Structure E Structure F
A photosynthesis mitosis
B photosynthesis protein synthesis
C respiration mitosis
D respiration photosynthesis
(Total for Question 1 = 6 marks)
3
■■■■ Turn over
