INSTRUCTIONS
• Use black ink. You may use an HB pencil for graphs and diagrams.
• Complete the boxes above with your name, centre number and candidate number.
• Answer all the questions.
• Where appropriate, your ans
...
INSTRUCTIONS
• Use black ink. You may use an HB pencil for graphs and diagrams.
• Complete the boxes above with your name, centre number and candidate number.
• Answer all the questions.
• Where appropriate, your answers should be supported with working. Marks may
be given for a correct method even if the answer is incorrect.
• Write your answer to each question in the space provided.
• Additional paper may be used if required but you must clearly show your candidate
number, centre number and question number(s).
• Do not write in the bar codes.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• This document consists of 24 pages.
© OCR 2020
[601/4261/3] DC (…) H020/01 Turn over
You may use:
• a scientific or graphical calculator
First name
Last name
Centre
number
Candidate
number2
© OCR 2020 H020/01
Section A
You should spend a maximum of 25 minutes on this section.
Answer all the questions.
1 Young mammals receive antibodies in their mother’s milk.
This is an example of which type of immunity?
A artificial active immunity
B artificial passive immunity
C natural active immunity
D natural passive immunity
Your answer [1]
2 Which of the following descriptions is correct?
A Vaccination gives long-term protection, immunisation gives short-term protection.
B Vaccination involves injection of antigenic material and immunisation is the process of
developing immunity.
C Vaccination involves injection of antigenic material, immunisation is injection of antibodies.
D Vaccination and immunisation have the same meaning.
Your answer [1]
3 When you listen to a human heartbeat through a stethoscope you can hear a two stage ‘lub–dub’
sound.
Which of the following causes the first ‘lub’ component?
A closing of the atrioventricular valves
B sound of blood rushing into the atria
C sound of blood rushing into the ventricles
D closing of semilunar valves
Your answe
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