AQA A-Level Biology Paper 1 Unofficial Mark Scheme | AQA A-Level 202
Maths Paper 1 Mark Scheme (2025)
Genetic material - (answers)The material within viruses containing 3 structures and genetic
information.
Capsid - (answers)The protein coat surrounding the genetic material of a virus.
Attachment protein - (answers)Protein on a virus that binds to complementary receptors on T
helper cells.
Lipid envelope - (answers)A membrane surrounding the capsid of some viruses.
Acellular viruses - (answers)Viruses that lack cellular structure and organelles, unable to
reproduce on their own.
Antibiotics vs viruses - (answers)Antibiotics target organelles like cell walls and ribosomes,
which viruses lack.
你是想要一篇“眼睛容易阅读的”
中文文章，还是一篇关于“眼睛”
Eukaryotic cell - (answers)A主题的中文文章？
cell with a nucleus and other organelles, such as mitochondria, ER,
and a nuclear envelope.
Cellulose vs chitin - (answers)Both made of glucose, form microfibrils, and have 1,4-glycosidic
bonds.
Insect gas exchange adaptation - (answers)Tracheoles thin for short diffusion pathways, liquid
aids diffusion into tissues.
Non-competitive enzyme inhibition - (answers)Binds to an allosteric site, changing the enzyme's
tertiary structure and inactivating it.
, Aseptic techniques - (answers)Procedures to prevent contamination, including sterilization and
hand washing.
Malaria-resistant allele - (answers)Allele that confers resistance to malaria, selected for due to
survival advantage.
Villi damage effects - (answers)Loss of surface area, reduced absorption, and disrupted water
potential gradient.
Carbon monoxide effects - (answers)Higher affinity to Hb, reducing oxygen dissociation and
delivery to tissues.
WHO measurement recommendation - (answers)Debate on whether WHO's measurements
should be adjusted based on data.
Tissue fluid return affected by drug - (answers)Proteins move into tissue fluid, increasing water
potential and causing less water to move back into capillaries.
Standard deviation - (answers)Measure of data variability, with overlapping deviations
你是想要一篇“眼睛容易阅读的”
suggesting chance differences.
中文文章，还是一篇关于“眼睛”
主题的中文文章？
Africa malaria calculation - (answers)Calculation of the total affected population based on given
percentages.
Migration out of Africa - (answers)Discussion of the range of migration patterns.
Magnification question - (answers)Calculation of magnification based on given measurements.
Positive and negative control - (answers)Use of controls in an experiment to validate results.
Maths Paper 1 Mark Scheme (2025)
Genetic material - (answers)The material within viruses containing 3 structures and genetic
information.
Capsid - (answers)The protein coat surrounding the genetic material of a virus.
Attachment protein - (answers)Protein on a virus that binds to complementary receptors on T
helper cells.
Lipid envelope - (answers)A membrane surrounding the capsid of some viruses.
Acellular viruses - (answers)Viruses that lack cellular structure and organelles, unable to
reproduce on their own.
Antibiotics vs viruses - (answers)Antibiotics target organelles like cell walls and ribosomes,
which viruses lack.
你是想要一篇“眼睛容易阅读的”
中文文章，还是一篇关于“眼睛”
Eukaryotic cell - (answers)A主题的中文文章？
cell with a nucleus and other organelles, such as mitochondria, ER,
and a nuclear envelope.
Cellulose vs chitin - (answers)Both made of glucose, form microfibrils, and have 1,4-glycosidic
bonds.
Insect gas exchange adaptation - (answers)Tracheoles thin for short diffusion pathways, liquid
aids diffusion into tissues.
Non-competitive enzyme inhibition - (answers)Binds to an allosteric site, changing the enzyme's
tertiary structure and inactivating it.
, Aseptic techniques - (answers)Procedures to prevent contamination, including sterilization and
hand washing.
Malaria-resistant allele - (answers)Allele that confers resistance to malaria, selected for due to
survival advantage.
Villi damage effects - (answers)Loss of surface area, reduced absorption, and disrupted water
potential gradient.
Carbon monoxide effects - (answers)Higher affinity to Hb, reducing oxygen dissociation and
delivery to tissues.
WHO measurement recommendation - (answers)Debate on whether WHO's measurements
should be adjusted based on data.
Tissue fluid return affected by drug - (answers)Proteins move into tissue fluid, increasing water
potential and causing less water to move back into capillaries.
Standard deviation - (answers)Measure of data variability, with overlapping deviations
你是想要一篇“眼睛容易阅读的”
suggesting chance differences.
中文文章，还是一篇关于“眼睛”
主题的中文文章？
Africa malaria calculation - (answers)Calculation of the total affected population based on given
percentages.
Migration out of Africa - (answers)Discussion of the range of migration patterns.
Magnification question - (answers)Calculation of magnification based on given measurements.
Positive and negative control - (answers)Use of controls in an experiment to validate results.
