Question
A plant with variegated leaves has the starch removed from its leaves by placing it in a dark
cupboard for 48 hours.
Black paper is then fixed on one leaf as shown and the plant is exposed to light.
After 24 hours, which part of the leaf contains starch?
Answer/Explanation
Ans
D
Question
Which row shows the effects of deficiencies in nitrate and magnesium ions on plant growth?
Answer/Explanation
Ans
C
Question
The graph shows the effect of light intensity on the rate of photosynthesis.
Which environmental factor is limiting the rate of photosynthesis at X on the graph?
A carbon dioxide concentration
B light intensity
C oxygen concentration
D temperature
Answer/Explanation
Ans
B
Question
Which molecule contains magnesium?
A chlorophyll
B fat
C glucose
D starch
Answer/Explanation
Ans
A
Question
A student drew a diagram to show the substances used and produced in photosynthesis in a leaf.
Answer/Explanation
Ans: B