HIS Combined Science (Biology) Nutrition Topic test
Name: ________________________________
_________( /10) + ________ ( /36) = ___________ ( /46)
Part A Multiple Choice (10 marks)
1. The diagram below shows a leaf in sunlight and some of the substances that diffuse into
and out of it.
Which of the following has a higher concentration outside the leaf than inside the leaf?
A. carbon dioxide only
B. carbon dioxide and oxygen
C. oxygen and water
D. water vapour only
2. A series of tests on a white liquid gave the following results:
Test
Result of test
Benedict’s
an orange-red colour
biuret
a pale blue colour
iodine
a blue-black colour
Based on these results, what did the white liquid contain?
A. protein and starch only
B. protein and reducing sugar only
C. protein, reducing sugar and starch
D. reducing sugar and starch only
3. Which part of a plant cell is formed from cellulose?
A. cell surface membrane
B. cell wall
C. chloroplasts
D. cytoplasm
4. Which two chemical substances are required for photosynthesis?
A. carbon dioxide and glucose
B. glucose and oxygen
C. oxygen and water
D. water and carbon dioxide
5. The flow chart below shows a green leaf being tested for the presence of starch:
What are substances 1, 2, 3 and 4?
1
2
3
4
A alcohol
water
iodine
water
B water
alcohol
water
iodine
C water
water
alcohol
iodine
D water
water
alcohol
water
6. The diagram below right shows a vertical section through an incisor in the jaw.
What is the name of the part labelled X?
A. cement
B. dentine
C. enamel
D. pulp
7. The diagram below shows some cells in a leaf of a green plant.
Which layer is the epidermis?
8. Which diagram represents the digestion of food molecules in the alimentary canal?
9. Which two nutrients are needed for healthy bone and tooth development?
A. calcium and iron
B. iron and vitamin C
C. vitamin C and vitamin D
D. vitamin D and calcium
10. In a photosynthesis experiment, a plant is left in bright sunlight for several hours. A leaf
is then removed from the plant and tested for starch, using iodine solution.
The figure below shows the leaf from the plant that was used in the experiment.
Which leaf below shows the result of the experiment?
Part B Extended Response (40 marks)
Question 1
The diagram below shows a section through a leaf.
a) On the diagram draw a line to show how carbon dioxide enters the leaf and travels into
the cell labelled X.
[1]
b) Complete the equation for photosynthesis
6CO2 + 6H20 → C6H12O6 + ___________________
[1]
c) Describe and explain one way in which cell X is adapted for photosynthesis.
__________________________________________________________________________
__________________________________________________________________________
________________________________________________________________________[2]
d) Describe how leaves are adapted to trap light.
___________________________________________________________________________
___________________________________________________________________________
________________________________________________________________________[2]
Question 2
An experiment was carried out to find out if carbon dioxide is needed for photosynthesis.
Stage 1
Stage 2
Stage 3
Stage 4
Two plants, A and B, of the same size and species were kept in a dark
place for 48 hours.
A leaf from each plant was then tested for the presence of starch using
iodine solution, to show that destarching was complete.
Both plants were placed in sealed glass containers, for 24 hours, as shown
in Fig. 5.1.
Plant A was in the presence of potassium hydroxide beads (which absorb
carbon dioxide).
Plant B was in the presence of glass beads. All other conditions needed for
photosynthesis were provided for both plants.
After 24 hours a leaf from each plant was tested for the presence of starch.
.
a) Explain why chlorophyll is removed from the leaf before testing it for starch.
___________________________________________________________________________
___________________________________________________________________________
________________________________________________________________________ [1]
b) State two factors, other than carbon dioxide, that both plants would need in order to
photosynthesise.
i.
_____________________________________________________________
ii.
_____________________________________________________________
[2]
c) Plant B was used as a control in the experiment. Explain the importance of this control.
___________________________________________________________________________
___________________________________________________________________________
________________________________________________________________________ [1]
d) Explain why the plants were destarched.
___________________________________________________________________________
___________________________________________________________________________
________________________________________________________________________ [1]
e) Complete the table below. Use ticks and crosses to show if the starch test for plants A
and B would be positive () or negative () at stage 2 and stage 4.
In each case, explain the reason for your answer.
Stage
Leaf from
plant
2
A and B
Starch test
( or )
Explanation
A
4
B
[3]
Question 3
A human tooth was suspended in hydrochloric acid and left for 24 hours, as shown in the
diagram below. When the tooth was removed and washed, the lower part, to which the cotton
was attached, was no longer hard, but soft and rubbery. After replacing the tooth in the acid for
another 24 hours, the rest of the tooth was also soft.
a) Name the part of the tooth to which the cotton was attached.
_____________________________________________________________________ [1]
b) With reference to tooth structure, suggest and explain why the lower part of the tooth
became soft before the upper part.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
_____________________________________________________________________ [4]
c) State and explain two reasons why regular brushing with this toothpaste would help to
protect teeth from decay.
Reason 1: _______________________________________________________________
________________________________________________________________________
Reason 2: _______________________________________________________________
_____________________________________________________________________ [2]
d) State two other ways (besides brushing) of maintaining healthy teeth.
Method 1: _______________________________________________________________
________________________________________________________________________
Method 2: _______________________________________________________________
_____________________________________________________________________ [2]
Question 4
a) Name the two types of digestion and state an organ where each one occurs.
Type of digestion
Organ where it occurs
[4]
b) Label the organs shown in the diagram below:
A
B
D
E
C
F
[6]
c) Which letter in the diagram above represents the organ that has villi?
What is the function of the villi?
Organ with villi: __________________________________________________________
Function: _______________________________________________________________
________________________________________________________________________
________________________________________________________________________
_____________________________________________________________________ [3]