CIE iGCSE Co-Ordinated Science B6.1 Photosynthesis Exam Style Questions Paper 1
Question
Which ion is important for chlorophyll production in plants?
A calcium
B iron
C magnesium
D nitrate
▶️Answer/Explanation
Ans :C
Question
The diagram shows an investigation into factors affecting photosynthesis.
The tubes are left for 24 hours after which the leaves are tested with iodine solution.
How many of these leaves turn blue-black when tested with iodine solution?
A 1 B 2 C 3 D 4
▶️Answer/Explanation
Ans :A
Question
A student places a plant in the dark for 24 hours.
Aluminium foil is then placed around one leaf.
A second leaf is sealed in a bag with soda lime to remove carbon dioxide.
A third leaf is then sealed in a bag with iron filings to remove oxygen.
The plant is then left in the light for a further 24 hours.
The diagram shows the experiment.
Which leaves would turn blue-black when tested with iodine solution?
A X only B X and Y C Y and Z D Z only
▶️Answer/Explanation
Ans :A
Question
A plant with variegated leaves is destarched. A strip of black paper is attached to both sides of a leaf and the plant is placed in the light for 24 hours.
The leaf is then tested for starch.
Which areas of the leaf stain blue-black with iodine?
(A) 1 and 4
(B) 1 only
(C) 2 and 3
(D) 2 only
▶️Answer/Explanation
Ans: D