Pearson Edexcel International GCSE In Biology
Mark Scheme (Results)
Summer 2025
Pearson Edexcel International GCSE
In Biology (4BI1) Paper 1BR
, Pearson Edexcel International GCSE In Biology
Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We provide
a wide range of qualifications including academic, vocational, occupational and specific programmes
for employers. For further information visit our qualifications websites at www.edexcel.com or
www.btec.co.uk. Alternatively, you can get in touch with us using the details on our contact us page
at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone progress in
their lives through education. We believe in every kind of learning, for all kinds of people, wherever
they are in the world. We’ve been involved in education for over 150 years, and by working across 70
countries, in 100 languages, we have built an international reputation for our commitment to high
standards and raising achievement through innovation in education. Find out more about how we
can help you and your students at: www.pearson.com/uk
Summer 2025
Question Paper Log Number P78763RA
Publications Code 4BI1_1BR_2506_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
, Pearson Edexcel International GCSE In Biology
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.
, Pearson Edexcel International GCSE In Biology
Question Answer Mark
Number
1(a)(i) A (Mucor is a eukaryotic organism with cell 1
walls made of chitin)
B is incorrect Mucor does not have cellulose
C is incorrect as Mucor is not a prokaryote
D is incorrect as Mucor is not a prokaryote
Question Answer Mark
Number
1(a)(ii) B (1) 1
A is incorrect Mucor has cytoplasm
C is incorrect as Mucor does not have chloroplasts or starch
D is incorrect as Mucor does not have chloroplasts or starch
Question Answer Additional guidance Mark
Number
1(a)(iii) 2
• 3.14 x 45 = 6358.5
2
One mark for answer
• to two sig figs = 6400 (2) between 6358 and 6362 that
is not to two sig figs
Correct answer gains both
marks
Mark Scheme (Results)
Summer 2025
Pearson Edexcel International GCSE
In Biology (4BI1) Paper 1BR
, Pearson Edexcel International GCSE In Biology
Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We provide
a wide range of qualifications including academic, vocational, occupational and specific programmes
for employers. For further information visit our qualifications websites at www.edexcel.com or
www.btec.co.uk. Alternatively, you can get in touch with us using the details on our contact us page
at www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone progress in
their lives through education. We believe in every kind of learning, for all kinds of people, wherever
they are in the world. We’ve been involved in education for over 150 years, and by working across 70
countries, in 100 languages, we have built an international reputation for our commitment to high
standards and raising achievement through innovation in education. Find out more about how we
can help you and your students at: www.pearson.com/uk
Summer 2025
Question Paper Log Number P78763RA
Publications Code 4BI1_1BR_2506_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
, Pearson Edexcel International GCSE In Biology
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.
, Pearson Edexcel International GCSE In Biology
Question Answer Mark
Number
1(a)(i) A (Mucor is a eukaryotic organism with cell 1
walls made of chitin)
B is incorrect Mucor does not have cellulose
C is incorrect as Mucor is not a prokaryote
D is incorrect as Mucor is not a prokaryote
Question Answer Mark
Number
1(a)(ii) B (1) 1
A is incorrect Mucor has cytoplasm
C is incorrect as Mucor does not have chloroplasts or starch
D is incorrect as Mucor does not have chloroplasts or starch
Question Answer Additional guidance Mark
Number
1(a)(iii) 2
• 3.14 x 45 = 6358.5
2
One mark for answer
• to two sig figs = 6400 (2) between 6358 and 6362 that
is not to two sig figs
Correct answer gains both
marks
