Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
INTERNATIONAL GCSE
BIOLOGY
Paper 1
Wednesday 27 October 2021 07:00 GMT Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator. 1
2
Instructions
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page. 4
• Answer all questions in the spaces provided.
5
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 6
• Do all rough work in this book. Cross through any work you do not 7
want to be marked.
TOTAL
Information
• There are 90 marks available on this paper.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation
in your answers.
Advice
In all calculations, show clearly how you work out your answer.
*NOV219201101*
IB/M/Nov21/E15 9201/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 The human nervous system helps humans react to their surroundings.
0 1 . 1 Receptors are part of the nervous system.
Name the organ where each type of receptor is found.
[3 marks]
Taste (chemical) receptor _____________________________
Light receptor ______________________________________
Sound receptor ______________________________________
0 1 . 2 Reflex actions are automatic responses to stimuli.
Reflex actions follow a pathway.
Table 1 shows the knee jerk reflex action.
Complete Table 1.
[3 marks]
Choose answers from the box.
Coordinator Effector Response Stimulus
Table 1
Direction of pathway Part of reflex pathway In the knee jerk reflex action
Tap the knee
Receptor Knee tendon
Sensory neurone Leg neurone A
Spinal cord
Motor neurone Leg neurone B
Leg muscle
Leg kicks out
*02*
IB/M/Nov21/9201/1
, 3
Do not write
outside the
0 1 . 3 A synapse is a gap between two neurones. box
Describe how the nerve impulse is transferred across a synapse to continue in the
second neurone.
[2 marks]
8
Turn over for the next question
Turn over ►
*03*
IB/M/Nov21/9201/1
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
INTERNATIONAL GCSE
BIOLOGY
Paper 1
Wednesday 27 October 2021 07:00 GMT Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator. 1
2
Instructions
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page. 4
• Answer all questions in the spaces provided.
5
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 6
• Do all rough work in this book. Cross through any work you do not 7
want to be marked.
TOTAL
Information
• There are 90 marks available on this paper.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation
in your answers.
Advice
In all calculations, show clearly how you work out your answer.
*NOV219201101*
IB/M/Nov21/E15 9201/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 The human nervous system helps humans react to their surroundings.
0 1 . 1 Receptors are part of the nervous system.
Name the organ where each type of receptor is found.
[3 marks]
Taste (chemical) receptor _____________________________
Light receptor ______________________________________
Sound receptor ______________________________________
0 1 . 2 Reflex actions are automatic responses to stimuli.
Reflex actions follow a pathway.
Table 1 shows the knee jerk reflex action.
Complete Table 1.
[3 marks]
Choose answers from the box.
Coordinator Effector Response Stimulus
Table 1
Direction of pathway Part of reflex pathway In the knee jerk reflex action
Tap the knee
Receptor Knee tendon
Sensory neurone Leg neurone A
Spinal cord
Motor neurone Leg neurone B
Leg muscle
Leg kicks out
*02*
IB/M/Nov21/9201/1
, 3
Do not write
outside the
0 1 . 3 A synapse is a gap between two neurones. box
Describe how the nerve impulse is transferred across a synapse to continue in the
second neurone.
[2 marks]
8
Turn over for the next question
Turn over ►
*03*
IB/M/Nov21/9201/1
