Mark Scheme (Results)
Summer 2026
Pearson Edexcel Advanced Level in Biology A
(Salters Nuffield)
9BN0/02
for more:
,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 acade
vocational, occupational and specific programmes for employers. For fur
information visit our qualifications websites at or
.
Alternatively, you can get in touch with us using the details on our contact
page at
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:
Summer 2026
Question Paper Log Number P79059A
Publication Code 9BN0_02_2606
l the material in this publication is
Pearson
for more:
,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.
for more:
, Question Answer Mark
Number
1 (a)(i) The only correct answer is D
A is incorrect as there are 3 hydrocarbon chains in a triglyceride
B is incorrect as there are 3 hydrocarbon chains in a triglyceride
C is incorrect as there are 3 hydrocarbon chains in a triglyceride (1)
Comp
Question Answer Additional guidance Mark
number
1 (a)(ii) An answer that makes reference to the following: ALLOW as a diagram
Similarity
• (both have a) glycerol / three fatty acids / three ALLOW both contain ester bonds
hydrocarbon chains (1)
Difference
• (only the unsaturated has) a { C=C (double bond)/ ALLOW converse – saturated triglyceride does
kink in a fatty acid (chain) } (1) not have double carbon to carbon bonds (2)
ALLOW saturated has higher H:C ratio / lower Exp
C:H ratio /double bonds in the HC chain
for more:
Summer 2026
Pearson Edexcel Advanced Level in Biology A
(Salters Nuffield)
9BN0/02
for more:
,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 acade
vocational, occupational and specific programmes for employers. For fur
information visit our qualifications websites at or
.
Alternatively, you can get in touch with us using the details on our contact
page at
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:
Summer 2026
Question Paper Log Number P79059A
Publication Code 9BN0_02_2606
l the material in this publication is
Pearson
for more:
,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.
for more:
, Question Answer Mark
Number
1 (a)(i) The only correct answer is D
A is incorrect as there are 3 hydrocarbon chains in a triglyceride
B is incorrect as there are 3 hydrocarbon chains in a triglyceride
C is incorrect as there are 3 hydrocarbon chains in a triglyceride (1)
Comp
Question Answer Additional guidance Mark
number
1 (a)(ii) An answer that makes reference to the following: ALLOW as a diagram
Similarity
• (both have a) glycerol / three fatty acids / three ALLOW both contain ester bonds
hydrocarbon chains (1)
Difference
• (only the unsaturated has) a { C=C (double bond)/ ALLOW converse – saturated triglyceride does
kink in a fatty acid (chain) } (1) not have double carbon to carbon bonds (2)
ALLOW saturated has higher H:C ratio / lower Exp
C:H ratio /double bonds in the HC chain
for more:
