Keeping in view the parts labeled 1 to 4 in the plant cell diagram, answer:

a. The structure that controls cell activities is nucleus (part 4). part 1 (cell wall) surrounds the plasma membrane of plant cell.
b. The biochemical process taking place in part 2 (chloroplast) is photosynthesis.
c. If part 4 (nucleus) is removed, the cell will lose its ability to control functions and eventually die. If part 3 (vacuole) is overfilled with water, the cell will become turgid and may burst in extreme cases.

 

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