CIE iGCSE Co-Ordinated Science B6.2 Leaf structure Exam Style Questions Paper 1
Question
The diagram shows a section of a dicotyledonous leaf.
Which layer is the spongy mesophyll?
▶️Answer/Explanation
Ans: C
Question
The diagram shows the cross-section of part of a leaf with cells labelled W, X, Y and Z.
Which cells lose most water and which cells absorb most carbon dioxide during the daytime?
(A) W and X (B) X and Y (C) Y and Z (D) W and Z
▶️Answer/Explanation
Ans: A
Question
One method of preventing food spoilage is to store it at 4 ºC in a refrigerator.
Why does storing food at low temperatures help to prevent food spoilage?
(A) It decreases enzyme activity.
(B) It denatures enzymes.
(C) It increases enzyme production.
(D) It kills cells.
▶️Answer/Explanation
Ans: A
Question
The diagram shows a cross-section through a plant leaf.
Which row identifies P and Q?
▶️Answer/Explanation
Answer: A
Explanation: The cuticle is the waxy outer layer of the leaf that prevents water loss, and the palisade mesophyll is the layer of cells where most photosynthesis occurs. These are correctly identified in the table.