Question 1

Paper 2Easy5 marks

Figure 1 shows a schematic mitochondrion and the fusion of a lysosome with a phagocytic vacuole.

AXmatrixYBlysosomephagocytic vacuolefusiondigestive enzymesengulfed material
(a)

Identify the mitochondrial adaptations indicated by X and Y.

[2]
(b)

In which mitochondrial compartment are enzymes and substrates of the Krebs cycle concentrated?

[1]
(c)

Explain one advantage of the compartmentalization shown in panel B for the cell.

[2]

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