Pearson Edexcel Level 3 GCE Biology B Advanced PAPER 3: General and Practical
Principles in Biology QP JUNE 2024
[Author name] [Date] [Course title]
, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Wednesday 19 June 2024
reference 9BI0/03
Morning (Time: 2 hours 30 minutes) Paper
Biology B
Advanced
PAPER 3: General and Practical Principles in Biology
You must have: Total Marks
Scientific calculator, HB pencil, ruler
Pearson Edexcel Level 3 GCE Biology B Advanced PAPER 3: General and Practical Principles in
Biology QP JUNE 2024
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.
In question(s) marked with an asterisk (*), marks will be awarded for your
ability 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.
Turn over
P78665A
©2024 Pearson Education Ltd.
*P78665A0144*
F:1/1/1/1/1/1/
, Answer ALL questions.
1 A student made a root tip squash to observe the stages of mitosis.
DO NOT WRITE IN THIS AREA
(a) Name the region of the root tip where cells are actively dividing.
(1)
....................................................................................................................................................................................................................................................................................
(b) Give one reason for each of the following:
(i) Treating the root tip with strong acid
(1)
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
(ii) Adding a stain to the root tip
DO NOT WRITE IN THIS AREA
(1)
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
(iii) Pressing lightly on the coverslip
(1)
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
DO NOT WRITE IN THIS AREA
2
*P78665A0244*
, (c) The diagram shows cells from a root tip squash.
The total number of cells is 39.
DO NOT WRITE IN THIS AREA
Calculate the mitotic index for this root tip squash.
AREA
Use the formula
number of cells in mitosis
INTHI
Mitotic index = × 100
total number of cells
S
Give your answer to one decimal place.
DO NOT WRITE
(2)
DO NOT WRITE IN THIS AREA
Answer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Total for Question 1 = 6 marks)
3
*P78665A0344* Turn over
Principles in Biology QP JUNE 2024
[Author name] [Date] [Course title]
, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Wednesday 19 June 2024
reference 9BI0/03
Morning (Time: 2 hours 30 minutes) Paper
Biology B
Advanced
PAPER 3: General and Practical Principles in Biology
You must have: Total Marks
Scientific calculator, HB pencil, ruler
Pearson Edexcel Level 3 GCE Biology B Advanced PAPER 3: General and Practical Principles in
Biology QP JUNE 2024
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.
In question(s) marked with an asterisk (*), marks will be awarded for your
ability 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.
Turn over
P78665A
©2024 Pearson Education Ltd.
*P78665A0144*
F:1/1/1/1/1/1/
, Answer ALL questions.
1 A student made a root tip squash to observe the stages of mitosis.
DO NOT WRITE IN THIS AREA
(a) Name the region of the root tip where cells are actively dividing.
(1)
....................................................................................................................................................................................................................................................................................
(b) Give one reason for each of the following:
(i) Treating the root tip with strong acid
(1)
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
(ii) Adding a stain to the root tip
DO NOT WRITE IN THIS AREA
(1)
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
(iii) Pressing lightly on the coverslip
(1)
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
DO NOT WRITE IN THIS AREA
2
*P78665A0244*
, (c) The diagram shows cells from a root tip squash.
The total number of cells is 39.
DO NOT WRITE IN THIS AREA
Calculate the mitotic index for this root tip squash.
AREA
Use the formula
number of cells in mitosis
INTHI
Mitotic index = × 100
total number of cells
S
Give your answer to one decimal place.
DO NOT WRITE
(2)
DO NOT WRITE IN THIS AREA
Answer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Total for Question 1 = 6 marks)
3
*P78665A0344* Turn over
