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Please check the examination details below before entering your candidate information
2022 xcel B
Candidate surname Other names
Ede
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Paper
Time 2 hours
reference 9BN0/02
Biology A (Salters Nuffield)
Advanced
PAPER 2: Energy, Exercise and Co-ordination
You must have: Total Marks
Ruler, pencil and calculator
Instructions
• Fill
Use black ink or ball‑point pen.
• centrein the boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer
Show all your working out in calculations and include units where appropriate.
• – there maythe questions in the spaces provided
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.
• structure
In questions 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.
• your answers if you have time at the end.
Check
Answer ALL questions. Write your answers in the spaces provided.
Ede
Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .
1 Blood from the lungs returns to the left side of the heart in the pulmonary vein. The
pulmonary vein does not have valves.
(a) (i) Describe how the atrioventricular (AV) valves work during one cardiac cycle.
(2)
(ii) The structure of the pulmonary vein is different from the structure of the
pulmonary artery.
Explain how this difference is related to the function of the pulmonary vein.
(2)
(i) Which of the following is released by platelets at location Q?
(1)
A fibrin
B prothrombin
C thrombin
D thromboplastin
(ii) Which of the following is an enzyme that converts a soluble plasma protein
into an insoluble protein at location Q?
(1)
A fibrinogen
B prothrombin
C thrombin
D thromboplastin
(Total for Question 1 = 6 marks)
*P67091A0328*
3
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