PRACTICE PAPER FOR 2026 SUMMER EXAMS
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
(Time: 1 hour 45 minutes) Paper
reference 1BI0/1H
Biology 2025 Predicted Paper
PAPER 1
Higher Tier
You must have: Total Marks
Ruler, calculator
Instructions
•• Use black ink or ball‑point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
Information
•• The total mark for this paper is 100.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Inability
the questions marked with an asterisk (*), marks will be awarded for your
to structure your answer logically, showing how the points that you make
are related or follow on from each other where appropriate.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
, PRACTICE PAPER FOR 2026 SUMMER EXAMS
1. (a) (i) Which of the following best describes adaptive radiation?
Gene flow between populations (1)
Rapid evolution of species from a common ancestor
Random mutation in isolated populations
Gradual change due to environmental stability
(ii) List two examples of selective pressures in ecosystems. (2)
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(iii) Invasive species can act as selective pressures. Explain how an introduced predator affects
native prey populations. (3)
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(iv) Define "gene pool" and explain its importance in evolution. (1)
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(Total for Question 1 = 7 marks)
Edexcel GCSE Biology Question Paper 1H 2025 Predicted
, PRACTICE PAPER FOR 2026 SUMMER EXAMS
2 (a) (i) Which macromolecule is broken down by amylase?
A. Proteins (1)
B. Lipids
C. Carbohydrates
D. Nucleic acids
(ii) An investigation measures amylase activity at different pH values. Using a provided graph,
describe the trend and state the optimum pH for amylase. (3)
(iii) Why does enzyme activity decrease outside its optimum pH range? (3)
……………………………………………………………………………………………………………………………………………
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……………………………………………………………………………………………………………………………………………
Edexcel GCSE Biology Question Paper 1H 2025 Predicted
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
(Time: 1 hour 45 minutes) Paper
reference 1BI0/1H
Biology 2025 Predicted Paper
PAPER 1
Higher Tier
You must have: Total Marks
Ruler, calculator
Instructions
•• Use black ink or ball‑point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
Information
•• The total mark for this paper is 100.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Inability
the questions marked with an asterisk (*), marks will be awarded for your
to structure your answer logically, showing how the points that you make
are related or follow on from each other where appropriate.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
, PRACTICE PAPER FOR 2026 SUMMER EXAMS
1. (a) (i) Which of the following best describes adaptive radiation?
Gene flow between populations (1)
Rapid evolution of species from a common ancestor
Random mutation in isolated populations
Gradual change due to environmental stability
(ii) List two examples of selective pressures in ecosystems. (2)
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
(iii) Invasive species can act as selective pressures. Explain how an introduced predator affects
native prey populations. (3)
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………..………
(iv) Define "gene pool" and explain its importance in evolution. (1)
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
(Total for Question 1 = 7 marks)
Edexcel GCSE Biology Question Paper 1H 2025 Predicted
, PRACTICE PAPER FOR 2026 SUMMER EXAMS
2 (a) (i) Which macromolecule is broken down by amylase?
A. Proteins (1)
B. Lipids
C. Carbohydrates
D. Nucleic acids
(ii) An investigation measures amylase activity at different pH values. Using a provided graph,
describe the trend and state the optimum pH for amylase. (3)
(iii) Why does enzyme activity decrease outside its optimum pH range? (3)
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
Edexcel GCSE Biology Question Paper 1H 2025 Predicted
