Mark Scheme
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
In Paper 1: Biology 1 (1SC0/1BF) –
Foundation Tier
, Edexcel Biology 1BF 2025 Predicted Question Paper
General Marking Guidance
• All candidates must receive the same treatment. Examiners must mark the first
candidate in exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates must be rewarded for
what they have shown they can do rather than penalised for omissions.
• Examiners should mark according to the mark scheme not according to their
perception of where the grade boundaries may lie.
• There is no ceiling on achievement. All marks on the mark scheme should be used
appropriately.
• All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide the principles by
which marks will be awarded and exemplification may be limited.
• When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
• Crossed out work should be marked UNLESS the candidate has replaced it
with an alternative response.
, Edexcel Biology 1BF 2025 Predicted Question Paper
Find the comprehensive elaborations for the question set provided
beneath the mark scheme for Question 01.
Question 1
Question Answers Extra information Mark
Answer: B. Chloroplast Chloroplast: Found in plant 1
01.a
cells, chloroplasts are the site of
photosynthesis where light
energy is converted into
chemical energy (glucose).
Question Answers Extra information Mark
01.b Labeled diagram: Labeled diagram: The 2
• Chloroplast: Oval- chloroplast contains thylakoid
shaped organelle membranes arranged in
inside the cell. stacks (grana) where light-
• Nucleus: Central dependent reactions occur,
circular organelle. while the stroma is the site of
• Cell wall: Outer rigid the Calvin cycle.
structure. (2 Marks)
Question Answers Extra information Mark
Mitochondria: Known
01.c Answer: Mitochondria as the "powerhouse of 1
the cell," mitochondria
produce ATP through
cellular respiration,
converting energy from
glucose into usable
cellular energy.
Question Answers Extra information Mark
3
, Edexcel Biology 1BF 2025 Predicted Question Paper
Bacterial vs. plant cells:
01.d Answer: Bacterial cells Bacteria are prokaryotic and 2
lack a nucleus and instead lack organelles like a nucleus.
have circular DNA; plant Plant cells are eukaryotic,
cells have a nucleus and a having membrane-bound
large central vacuole. organelles such as chloroplasts,
mitochondria, and a central
vacuole.
Question Answers Extra information Mark
01.e 1. Calculation: 1
Magnification=Image
sizeActual size\text{M
agnification} =
\frac{\text{Image
size}}{\text{Actual
size}}
Image size=50 μm×40
0=20,000 μm=20 mm\t
ext{Image size} = 50 \,
\mu m \times 400 =
20,000 \, \mu m = 20
\, mm
Answer: 20 mm (1
Mark)
Total Question 1 7
4
(Results)
2025 Predicted Paper
Pearson Edexcel GCSE
In Paper 1: Biology 1 (1SC0/1BF) –
Foundation Tier
, Edexcel Biology 1BF 2025 Predicted Question Paper
General Marking Guidance
• All candidates must receive the same treatment. Examiners must mark the first
candidate in exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates must be rewarded for
what they have shown they can do rather than penalised for omissions.
• Examiners should mark according to the mark scheme not according to their
perception of where the grade boundaries may lie.
• There is no ceiling on achievement. All marks on the mark scheme should be used
appropriately.
• All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide the principles by
which marks will be awarded and exemplification may be limited.
• When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
• Crossed out work should be marked UNLESS the candidate has replaced it
with an alternative response.
, Edexcel Biology 1BF 2025 Predicted Question Paper
Find the comprehensive elaborations for the question set provided
beneath the mark scheme for Question 01.
Question 1
Question Answers Extra information Mark
Answer: B. Chloroplast Chloroplast: Found in plant 1
01.a
cells, chloroplasts are the site of
photosynthesis where light
energy is converted into
chemical energy (glucose).
Question Answers Extra information Mark
01.b Labeled diagram: Labeled diagram: The 2
• Chloroplast: Oval- chloroplast contains thylakoid
shaped organelle membranes arranged in
inside the cell. stacks (grana) where light-
• Nucleus: Central dependent reactions occur,
circular organelle. while the stroma is the site of
• Cell wall: Outer rigid the Calvin cycle.
structure. (2 Marks)
Question Answers Extra information Mark
Mitochondria: Known
01.c Answer: Mitochondria as the "powerhouse of 1
the cell," mitochondria
produce ATP through
cellular respiration,
converting energy from
glucose into usable
cellular energy.
Question Answers Extra information Mark
3
, Edexcel Biology 1BF 2025 Predicted Question Paper
Bacterial vs. plant cells:
01.d Answer: Bacterial cells Bacteria are prokaryotic and 2
lack a nucleus and instead lack organelles like a nucleus.
have circular DNA; plant Plant cells are eukaryotic,
cells have a nucleus and a having membrane-bound
large central vacuole. organelles such as chloroplasts,
mitochondria, and a central
vacuole.
Question Answers Extra information Mark
01.e 1. Calculation: 1
Magnification=Image
sizeActual size\text{M
agnification} =
\frac{\text{Image
size}}{\text{Actual
size}}
Image size=50 μm×40
0=20,000 μm=20 mm\t
ext{Image size} = 50 \,
\mu m \times 400 =
20,000 \, \mu m = 20
\, mm
Answer: 20 mm (1
Mark)
Total Question 1 7
4
