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2024 Pearson Edexcel Advanced Level GCE In Biology B (9BI0) Paper 03: General and Practical Principles in Biology ACTUAL QUESTION PAPER AND MERGED MARKING SCHEME 2024 $7.79   Add to cart
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2024 Pearson Edexcel Advanced Level GCE In Biology B (9BI0) Paper 03: General and Practical Principles in Biology ACTUAL QUESTION PAPER AND MERGED MARKING SCHEME 2024
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2024 Pearson Edexcel Advanced Level GCE In Biology B (9BI0) Paper 03: General and Practical Principles in Biology ACTUAL QUESTION PAPER AND MERGED MARKING SCHEME 2024

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  • October 29, 2024
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  • pearson edexcel advanced level gce in biology b 9

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Pearson Edexcel Advanced Level GCE In Biology B
9BI0)Paper 03: General and Practical Principles in
Biology

Pearson Edexcel Advanced Leve
GCE In Biology B (9BI0)Paper 03
General and Practical Principles i
Biology




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, Candidate surname Other names


Centre Number Candidate Number




Paper


B
■ ■


Advanced
PAPER 3: General and Practical Principles in Biology


Marks
Scientific calculator, HB pencil, ruler



Instructions

• Use black ink or ball‑point pen.
centre number and candidate number.

Answer the questions in the spaces provided –
there may be more space than you need.

Information

• The total mark for this paper is 120.
– 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.
• Check your answers if you have time at the end.
Turn over

, Answer ALL questions.

1 A student made a root tip squash to observe the stages of mitosis.

(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
(1)

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



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



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


(iii) Pressing lightly on the coverslip
(1)

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



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



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




2
■■■■

, (c) The diagram shows cells from a root tip squash. The

total number of cells is 39.




Calculate the mitotic index for this root tip squash. Use

the formula

number of cells in mitosis
Mitotic index = × 100
total number of cells

Give your answer to one decimal place.
(2)




Answer ..............................................................



(Total for Question 1 = 6 marks)




3
■■■■ Turn over

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