,Use pastpapers like this to help you revise
Understand exam format and structure
Past papers show the types of questions, mark allocations, and time limits,
helping students know what to expect in the real exam.
Identify frequently tested topics
By reviewing several past papers, students can spot patterns and common
themes that appear regularly.
Practice time management
Completing past papers under timed conditions helps students learn how
to pace themselves during the exam.
Improve exam technique
Students learn how to interpret command words (e.g. explain, compare,
evaluate) and structure answers effectively.
Assess strengths and weaknesses
Marking answers using mark schemes highlights areas that need more
revision.
Build confidence
Familiarity with exam-style questions reduces anxiety and increases
confidence going into the exam.
Improve accuracy and clarity
Repeated practice helps students write clearer, more precise answers and
avoid common mistakes.
Track progress over time
Comparing results from different past papers shows improvement and
helps students adjust revision strategies.
TYRIONPAPERS.COM
, Oxford Cambridge and RSA
Friday 13 June 2025 – Morning
A Level Biology A
H420/02 Biological diversity
Time allowed: 2 hours 15 minutes
You can use:
* 1 8 4 7 4 5 7 2 7 8 *
• a scientific or graphical calculator
• a ruler (cm/mm)
* H 4 2 0 0 2 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/4260/1] OCR is an exempt Charity
DC (WW/CT) 345421/6 Turn over
for more: tyrionpapers.com
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Hydrogen bonds are important for the physical and chemical properties of water.
How do hydrogen bonds form in water?
A Electronegative (δ–) oxygen atoms are attracted to the electropositive (δ+) hydrogen atoms
of adjacent water molecules.
B Electronegative (δ–) oxygen atoms are attracted to the electropositive (δ+) hydrogen atoms
within the same water molecule.
C Electropositive (δ+) oxygen atoms are attracted to the electronegative (δ–) hydrogen atoms
of adjacent water molecules.
D Electropositive (δ+) oxygen atoms are attracted to the electronegative (δ–) hydrogen atoms
within the same water molecule.
Your answer [1]
2 Water has many properties that are important for living organisms.
Which property of water molecules explains why small animals, such as pond skaters, are able to
move over the surface of water without sinking?
A Adhesion
B Buoyancy
C Cohesion
D Density
Your answer [1]
© OCR 2025
for more: tyrionpapers.com
Understand exam format and structure
Past papers show the types of questions, mark allocations, and time limits,
helping students know what to expect in the real exam.
Identify frequently tested topics
By reviewing several past papers, students can spot patterns and common
themes that appear regularly.
Practice time management
Completing past papers under timed conditions helps students learn how
to pace themselves during the exam.
Improve exam technique
Students learn how to interpret command words (e.g. explain, compare,
evaluate) and structure answers effectively.
Assess strengths and weaknesses
Marking answers using mark schemes highlights areas that need more
revision.
Build confidence
Familiarity with exam-style questions reduces anxiety and increases
confidence going into the exam.
Improve accuracy and clarity
Repeated practice helps students write clearer, more precise answers and
avoid common mistakes.
Track progress over time
Comparing results from different past papers shows improvement and
helps students adjust revision strategies.
TYRIONPAPERS.COM
, Oxford Cambridge and RSA
Friday 13 June 2025 – Morning
A Level Biology A
H420/02 Biological diversity
Time allowed: 2 hours 15 minutes
You can use:
* 1 8 4 7 4 5 7 2 7 8 *
• a scientific or graphical calculator
• a ruler (cm/mm)
* H 4 2 0 0 2 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/4260/1] OCR is an exempt Charity
DC (WW/CT) 345421/6 Turn over
for more: tyrionpapers.com
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Hydrogen bonds are important for the physical and chemical properties of water.
How do hydrogen bonds form in water?
A Electronegative (δ–) oxygen atoms are attracted to the electropositive (δ+) hydrogen atoms
of adjacent water molecules.
B Electronegative (δ–) oxygen atoms are attracted to the electropositive (δ+) hydrogen atoms
within the same water molecule.
C Electropositive (δ+) oxygen atoms are attracted to the electronegative (δ–) hydrogen atoms
of adjacent water molecules.
D Electropositive (δ+) oxygen atoms are attracted to the electronegative (δ–) hydrogen atoms
within the same water molecule.
Your answer [1]
2 Water has many properties that are important for living organisms.
Which property of water molecules explains why small animals, such as pond skaters, are able to
move over the surface of water without sinking?
A Adhesion
B Buoyancy
C Cohesion
D Density
Your answer [1]
© OCR 2025
for more: tyrionpapers.com
