AQA_2024: AS Biology - Paper 1
(Merged Question Paper and Marking Scheme)
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signat ure
I declare this is my own work.
AS
BIOLOGY
Paper 1
Monday 13 May 2024 Morning Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have:
a ruler with millimetre measurements Question Mark
a scientific calculator. 1
2
Instructions
Use black ink or black ball-point pen. 3
Fill in the boxes at the top of this page. 4
Answer all questions. 5
You must answer the questions in the spaces provided. Do not write
6
outside the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s). 8
Show all your working.
9
Do all rough work in this book. Cross through any work you do not want
to be marked. TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 75.
,For AS Biology Paper 1, focus on the following key areas:
1. Cell Biology:
Cell Structure: Know the structure and function of prokaryotic and eukaryotic cells, including organelles
(e.g., nucleus, mitochondria, ribosomes, chloroplasts).
Microscopy: Understand how to use light and electron microscopes to observe cells and structures. Be
familiar with magnification calculations.
Transport Across Membranes: Study passive and active transport mechanisms (diffusion, osmosis,
facilitated diffusion, active transport, endocytosis, exocytosis).
2. Biological Molecules:
Carbohydrates, Proteins, Lipids, and Nucleic Acids: Understand the structure, function, and
importance of these molecules.
o Proteins: Amino acids, peptide bonds, levels of protein structure (primary, secondary, tertiary,
quaternary).
o Carbohydrates: Monosaccharides, disaccharides, polysaccharides (e.g., glucose, starch,
glycogen, cellulose).
o Lipids: Structure of triglycerides and phospholipids, functions of lipids in cells.
o Nucleic Acids: Structure of DNA and RNA, DNA replication, transcription, and translation.
3. Enzymes:
Enzyme Structure and Function: Understand the lock and key theory, induced fit model, and factors
affecting enzyme activity (temperature, pH, concentration).
Enzyme Kinetics: Be able to interpret enzyme graphs and understand concepts such as activation
energy, and competitive and non-competitive inhibition.
4. Exchange and Transport:
Gas Exchange: Understand the adaptations of different organisms (e.g., humans, fish, plants) for
efficient gas exchange.
Transport Systems: Study the circulatory system in humans (heart, blood vessels, blood composition),
and how substances are transported across membranes.
o Plant Transport: Transpiration, xylem, phloem, and movement of water and nutrients.
5. Cell Recognition and the Immune System:
Antigens and Antibodies: Understand how the immune system recognizes foreign antigens and the
role of antibodies in immune responses.
Phagocytosis, T-cells, and B-cells: Study the process of phagocytosis, the role of helper T-cells,
cytotoxic T-cells, and B-cells in the immune response.
6. Biodiversity and Classification:
Classification Systems: Understand the hierarchy of classification (kingdom, phylum, class, order,
family, genus, species).
Biodiversity: Study how biodiversity can be measured, factors that threaten biodiversity, and the
importance of conservation.
IB/M/Jun24/G4001/E9 7401/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Figure 1 shows a diagram of the human gas exchange system.
Figure 1
Structure B is muscle. The volume of the thorax is increased when structure B
contracts.
Name the structures labelled A and B.
[2 marks]
A
B
IB/M/Jun24/7401/1
, 3
Do not write
outside the
0 1 . 2 Figure 2 is a diagram of an alveolus and a blood vessel associated with the alveolus. box
The direction of the movement of substances is shown by the arrows labelled C, D, E,
F and G.
Figure 2
Complete Table 1 by writing the correct letter, C, D, E, F or G, in the box next to each
statement. You may use each letter once, more than once or not at all.
[2 marks]
Table 1
Box Statement
represents the diffusion of oxygen
represents the transport of a gas mixture
represents blood moving at the highest pressure
Turn over ►
IB/M/Jun24/7401/1
(Merged Question Paper and Marking Scheme)
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signat ure
I declare this is my own work.
AS
BIOLOGY
Paper 1
Monday 13 May 2024 Morning Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have:
a ruler with millimetre measurements Question Mark
a scientific calculator. 1
2
Instructions
Use black ink or black ball-point pen. 3
Fill in the boxes at the top of this page. 4
Answer all questions. 5
You must answer the questions in the spaces provided. Do not write
6
outside the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s). 8
Show all your working.
9
Do all rough work in this book. Cross through any work you do not want
to be marked. TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 75.
,For AS Biology Paper 1, focus on the following key areas:
1. Cell Biology:
Cell Structure: Know the structure and function of prokaryotic and eukaryotic cells, including organelles
(e.g., nucleus, mitochondria, ribosomes, chloroplasts).
Microscopy: Understand how to use light and electron microscopes to observe cells and structures. Be
familiar with magnification calculations.
Transport Across Membranes: Study passive and active transport mechanisms (diffusion, osmosis,
facilitated diffusion, active transport, endocytosis, exocytosis).
2. Biological Molecules:
Carbohydrates, Proteins, Lipids, and Nucleic Acids: Understand the structure, function, and
importance of these molecules.
o Proteins: Amino acids, peptide bonds, levels of protein structure (primary, secondary, tertiary,
quaternary).
o Carbohydrates: Monosaccharides, disaccharides, polysaccharides (e.g., glucose, starch,
glycogen, cellulose).
o Lipids: Structure of triglycerides and phospholipids, functions of lipids in cells.
o Nucleic Acids: Structure of DNA and RNA, DNA replication, transcription, and translation.
3. Enzymes:
Enzyme Structure and Function: Understand the lock and key theory, induced fit model, and factors
affecting enzyme activity (temperature, pH, concentration).
Enzyme Kinetics: Be able to interpret enzyme graphs and understand concepts such as activation
energy, and competitive and non-competitive inhibition.
4. Exchange and Transport:
Gas Exchange: Understand the adaptations of different organisms (e.g., humans, fish, plants) for
efficient gas exchange.
Transport Systems: Study the circulatory system in humans (heart, blood vessels, blood composition),
and how substances are transported across membranes.
o Plant Transport: Transpiration, xylem, phloem, and movement of water and nutrients.
5. Cell Recognition and the Immune System:
Antigens and Antibodies: Understand how the immune system recognizes foreign antigens and the
role of antibodies in immune responses.
Phagocytosis, T-cells, and B-cells: Study the process of phagocytosis, the role of helper T-cells,
cytotoxic T-cells, and B-cells in the immune response.
6. Biodiversity and Classification:
Classification Systems: Understand the hierarchy of classification (kingdom, phylum, class, order,
family, genus, species).
Biodiversity: Study how biodiversity can be measured, factors that threaten biodiversity, and the
importance of conservation.
IB/M/Jun24/G4001/E9 7401/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Figure 1 shows a diagram of the human gas exchange system.
Figure 1
Structure B is muscle. The volume of the thorax is increased when structure B
contracts.
Name the structures labelled A and B.
[2 marks]
A
B
IB/M/Jun24/7401/1
, 3
Do not write
outside the
0 1 . 2 Figure 2 is a diagram of an alveolus and a blood vessel associated with the alveolus. box
The direction of the movement of substances is shown by the arrows labelled C, D, E,
F and G.
Figure 2
Complete Table 1 by writing the correct letter, C, D, E, F or G, in the box next to each
statement. You may use each letter once, more than once or not at all.
[2 marks]
Table 1
Box Statement
represents the diffusion of oxygen
represents the transport of a gas mixture
represents blood moving at the highest pressure
Turn over ►
IB/M/Jun24/7401/1
