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EDEXCEL BIOLOGY B A LEVEL JUNE 2023
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PRATICAL PRINCIPLES IN BIOLOGY.
IO HE
AY
, EDEXCEL A LEVEL JUNE 2023
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 21 June 2023
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
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1 Glucose is a monosaccharide.
(a) Complete the diagram to show the structure of beta‑glucose.
(1)
CH2OH
H O
H
OH H
HO
H OH
(b) Glucose molecules can be joined to form the polysaccharides starch and cellulose.
Give three differences between the structures of starch and cellulose.
(3)
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