, 2
1 There are receptors on the inside and outside of your body.
A receptor detects a stimulus.
(a) Receptors are found in sense organs.
Draw lines to connect each sense organ with the correct stimulus.
Sense organ Stimulus
Ear Chemicals in the air
Eye Light
Nose Sound
[2]
(b) If you touch something very hot, your hand pulls away immediately.
This is a reflex response.
(i) Reflex responses are automatic.
Write down one other word that describes a reflex response.
..................................................................................................................................................... [1]
(ii) A reflex response is carried out by an effector.
What is the effector that pulls your hand away when you touch something hot?
Tick (✓) one box.
Brain
Kidney
Muscle
Skin
[1]
© OCR 2024
,
, 4
2 Cells contain genetic material.
(a) Which part of a plant cell is the genetic material stored in?
Tick (✓) one box.
Cell wall
Cytoplasm
Nucleus
Vacuole
[1]
(b) Complete the sentences about genetic material.
Put a ring around each correct option.
Genetic material contains chloroplasts / instructions / proteins which control how cells and
organisms develop and function.
All the genetic material in a cell is called the gene / genome / nucleotide.
[2]
(c) Genetic material is made of DNA.
Which statements about DNA are true and which are false?
Tick (✓) one box in each row.
True False
DNA is a polymer.
DNA is a triple helix.
DNA is made from a chain of amino acids.
DNA is made of two strands.
[3]
© OCR 2024
1 There are receptors on the inside and outside of your body.
A receptor detects a stimulus.
(a) Receptors are found in sense organs.
Draw lines to connect each sense organ with the correct stimulus.
Sense organ Stimulus
Ear Chemicals in the air
Eye Light
Nose Sound
[2]
(b) If you touch something very hot, your hand pulls away immediately.
This is a reflex response.
(i) Reflex responses are automatic.
Write down one other word that describes a reflex response.
..................................................................................................................................................... [1]
(ii) A reflex response is carried out by an effector.
What is the effector that pulls your hand away when you touch something hot?
Tick (✓) one box.
Brain
Kidney
Muscle
Skin
[1]
© OCR 2024
,
, 4
2 Cells contain genetic material.
(a) Which part of a plant cell is the genetic material stored in?
Tick (✓) one box.
Cell wall
Cytoplasm
Nucleus
Vacuole
[1]
(b) Complete the sentences about genetic material.
Put a ring around each correct option.
Genetic material contains chloroplasts / instructions / proteins which control how cells and
organisms develop and function.
All the genetic material in a cell is called the gene / genome / nucleotide.
[2]
(c) Genetic material is made of DNA.
Which statements about DNA are true and which are false?
Tick (✓) one box in each row.
True False
DNA is a polymer.
DNA is a triple helix.
DNA is made from a chain of amino acids.
DNA is made of two strands.
[3]
© OCR 2024
