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A Level Edexcel 2026 Biology B Paper 3

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A Level Edexcel 2026 Biology B Paper 3

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, Please check the examination details below before entering your candidate information
Candidate surname Other names


Centre Number Candidate Number




Pearson Edexcel Level 3 GCE
Tuesday 16 June 2026
Morning (Time: 2 hours 30 minutes) Paper
reference 9BI0/03
Biology B  


Advanced
PAPER 3: General and Practical Principles in Biology

You must have: Total Marks
Scientific calculator, HB pencil, ruler



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 120.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Instructure
question(s) marked with an asterisk (*), marks will be awarded for your ability to
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.
Turn over


P79064A
©2026 Pearson Education Ltd.
P:1/1/1/1/1/1/1/1/
*P79064A0144*

, Answer ALL questions.
Write your answers in the spaces provided.




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1 Cells near the root tip divide by mitosis and can be viewed using a light microscope.
(a) The photograph shows a root cell undergoing mitosis, as seen with a
light microscope.




(Source: © DR. JUAN F. GIMENEZ-ABIAN / SCIENCE PHOTO LIBRARY)

(i) Identify the stage of mitosis shown.
(1)

. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .


(ii) Draw this cell.
Labels are not required.
(2)




2
*P79064A0244* 

, (iii) The actual length of this cell is 45 µm at its longest part.
Calculate the magnification of the photograph.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA




Give your answer to the nearest whole number.
(2)




Answer....................................................................... . . . . . . . . . . . . . . . . . . . . . .
(b) Describe the method you would use to find the actual length of a cell from the
root tip of a plant which had already been prepared and stained.
(2)

. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .



. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .



. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .



. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .



. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .



. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .


(Total for Question 1 = 7 marks)




3



 *P79064A0344* Turn over

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