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Pearson Edexcel A-LEVEL Paper 1 Biology Advanced Subsidiary/Advanced Level UNIT 3: Practical Skills in Biology I January 2024 AUTHENTIC MARKING SCHEME ATTACHED £5.79   Add to cart
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Pearson Edexcel A-LEVEL Paper 1 Biology Advanced Subsidiary/Advanced Level UNIT 3: Practical Skills in Biology I January 2024 AUTHENTIC MARKING SCHEME ATTACHED
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Pearson Edexcel A-LEVEL Paper 1 Biology Advanced Subsidiary/Advanced Level UNIT 3: Practical Skills in Biology I January 2024 AUTHENTIC MARKING SCHEME ATTACHED

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  • April 18, 2024
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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 International Advanced Level
Friday 19 January 2024
Morning (Time: 1 hour 20 minutes) Paper
reference WBI13/01
Biology  


International Advanced Subsidiary/Advanced Level
UNIT 3: Practical Skills in Biology I

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



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 50.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.

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


P75591A
©2024 Pearson Education Ltd.
S:1/1/1/1/
*P75591A0116*

, 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 Vitamin C is a dietary antioxidant.
Spinach is a plant that produces edible leaves with a high vitamin C content.
(a) Explain the link between dietary antioxidants and the risk of
cardiovascular disease (CVD).
(3)

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2
*P75591A0216* 

, (b) The vitamin C content of the leaves from spinach plants was investigated.
Describe how comparative measurements of the vitamin C content of the leaves
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA




from two spinach plants could be made.
(5)

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3
 *P75591A0316* Turn over

, (c) The effect of soil type and season on the vitamin C content of spinach plants
was investigated.




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
The table shows some data from spinach grown in the two soil types, in spring
and autumn.


Vitamin C content of leaves / mg g–1

Spring Autumn

Soil type 1 Soil type 2 Soil type 1 Soil type 2

Mean   0.49   0.73   0.59 0.95

Standard deviation ± 0.07 ± 0.09 ± 0.06


(i) The table shows the data required to calculate the missing standard deviation
for the spinach grown in soil type 2 in the autumn.


(x – x )2

0.031

0.009

0.031

0.004

0.013

0.006

0.001

0.024

0.000

0.024

0.055

0.002




4



*P75591A0416* 

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