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Pearson Edexcel International Advanced Level WBI16/01 Biology International Advanced UNIT 6: Practical Skills in Biology II October 2024 + mark scheme

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Pearson Edexcel International Advanced Level WBI16/01 Biology International Advanced UNIT 6: Practical Skills in Biology II October 2024 + mark scheme

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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
Tuesday 29 October 2024
Morning (Time: 1 hour 20 minutes) Paper
reference WBI16/01
Biology  


International Advanced
UNIT 6: Practical Skills in Biology II

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


P78447A
©2024 Pearson Education Ltd.
V:1/1/1/1/1/
*P78447A0120*

, Answer ALL questions.

1 Gibberellin stimulates germinating wheat grains to synthesise amylase.




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
(a) State why germinating wheat grains need to produce amylase.
(1)

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



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(b) The drawing shows a wheat grain and the locations of the endosperm and
the embryo.


endosperm




embryo


Describe an experiment to determine if gibberellin stimulates the synthesis of
amylase by the endosperm or embryo of a wheat grain.
(6)

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2
*P78447A0220* 

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DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA




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(c) Describe how gibberellin increases amylase synthesis.
(3)

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(Total for Question 1 = 10 marks)




3
 *P78447A0320* Turn over

, 2 The photograph shows kenaf plants that grow in many African countries.




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
(Source: © Dorling Kindersley Ltd / Alamy Stock Photo)

The plants are grown for food and as a source of fibres.
A scientist investigated the tensile strength of samples of fibres from kenaf plants.
Some of the samples of fibres were treated with hydrogen peroxide and other
samples were untreated.




4



*P78447A0420* 

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