Exam (elaborations)
Pearson Edexcel Biology A Advanced PAPER 3 General and Practical Applications in Biology june 2023
Pearson Edexcel Biology A Advanced PAPER 3 General and Practical Applications in Biology june 2023
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Candidate surname Other namesCentre Number Candidate Number
Pearson Edexcel Level 3
GCE
Wednesday 21 June
2023 9BN0/03
Morning (Time: 2
hours) Pape
r
reference
Biology A (Salters Nuffield)
Advanced
PAPER 3: General and Practical Applications in Biology
You must have: Total Marks
Ruler, HB pencil, scientific calculator and a copy of the
scientific article adapted from Scientific American
(enclosed)
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
Show all your working out in calculations and include units where appropriate.
• Answer the questions in the spaces provided
questions.
– there may be more space than you need.
Information
•• The total mark for this paper is 100.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each
• question. You may use a scientific calculator.
• Inability
questions marked with an asterisk (*), marks will be awarded for your
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 Turn over
end.
, Answer ALL questions.
Write your answers in the spaces provided.
AREA
DO NOT WRITE IN THIS
1 The heart pumps blood around the circulation system.
(a) Explain why many animals need a heart and circulation system.
(2)
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AREA
DO NOT WRITE IN THIS
(b) If the heart of an animal is removed from its body, the heart will continue to
beat for a period of time.
The left atrium stops contracting if it is separated from the rest of the heart.
However, the right atrium and the rest of the heart will continue to beat.
Eventually, the right atrium and the rest of the heart will also stop beating.
(i) Give a reason why the heart will continue to beat after being removed
from the body.
(1)
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(ii) Explain why the left atrium stops beating when it is separated from
the right atrium.
(2)
AREA
DO NOT WRITE IN THIS
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2
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3
Turn
over
, (iii) Explain why the right atrium and the rest of the heart eventually stop
beating. (2)
. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. ... .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. ... .. .. .. .. .. .. .. ..
DO NOT WRITE IN THIS
. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. ... .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. ... .. .. .. .. .. .. .. .. ......................
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AREA
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(Total for Question 1 = 7 marks)
DO NOT WRITE IN THIS
AREA
DO NOT WRITE IN THIS
AREA
4
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