A-level bio A
OCR Oxford Cambridge and RSA
Friday 24 June 2022 – Morning
A Level Biology A
H420/03 Unified biology
Time allowed: 1 hour 30 minutes
You can use:
a ruler (cm/mm)
a scientific or graphical calculator
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra
space use the lined pages at the end of this booklet. The question numbers
must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working.
Marks might be given for using a correct method, even if your answer is
wrong.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an
asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
,© OCR 2022 OCR is an exempt
[601/4260/1] DC Charity Turn over
(ST/CT) 301309/5
, Answer all the questions.
1 The heart can be affected by a variety of disorders, some of which involve the
immune system.
(a) Fig. 1.1 shows the roles of three different types of antibody, labelled R, S and T.
R S
Pathogen
Pathogen
Antibod
Receptor
y
White
Antibod
blood y
cell
T
Antibody
Harmful
molecules released
by pathogens
Fig. 1.1
State the names of the three different types of antibody shown in Fig. 1.1.
R ..............................................................................................................................
.................
S ..............................................................................................................................
.................
T ..............................................................................................................................
.................
[3]
(b) A condition called rheumatic heart disease can occur when a person’s
antibodies attack antigens on their own heart cells.
State the name of the type of disease represented by rheumatic heart disease.
, ....................................................................................................................................
.......... [1]
OCR Oxford Cambridge and RSA
Friday 24 June 2022 – Morning
A Level Biology A
H420/03 Unified biology
Time allowed: 1 hour 30 minutes
You can use:
a ruler (cm/mm)
a scientific or graphical calculator
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra
space use the lined pages at the end of this booklet. The question numbers
must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working.
Marks might be given for using a correct method, even if your answer is
wrong.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an
asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
,© OCR 2022 OCR is an exempt
[601/4260/1] DC Charity Turn over
(ST/CT) 301309/5
, Answer all the questions.
1 The heart can be affected by a variety of disorders, some of which involve the
immune system.
(a) Fig. 1.1 shows the roles of three different types of antibody, labelled R, S and T.
R S
Pathogen
Pathogen
Antibod
Receptor
y
White
Antibod
blood y
cell
T
Antibody
Harmful
molecules released
by pathogens
Fig. 1.1
State the names of the three different types of antibody shown in Fig. 1.1.
R ..............................................................................................................................
.................
S ..............................................................................................................................
.................
T ..............................................................................................................................
.................
[3]
(b) A condition called rheumatic heart disease can occur when a person’s
antibodies attack antigens on their own heart cells.
State the name of the type of disease represented by rheumatic heart disease.
, ....................................................................................................................................
.......... [1]
