Question

Arrange the steps correctly to visualise an onion cell. [2 marks]

A. Stain the membrane with safranin and wash it with distilled water.
B. Peel the onion membrane from the inner layer of an onion flesh.
C. Remove excess liquid and place the cell under a microscope.
D. Place the membrane on a glass slide and cover it with a coverslip.

Answer 1

• The steps correctly to visualise an onion cell are: (2 marks)

1. Peel the onion membrane from the inner layer of an onion flesh.
2. Stain the membrane with safranin and wash it with distilled water.
3. Place the membrane on a glass slide and cover it with a coverslip.
4. Remove excess liquid and place the cell under a microscope.

• Thus, the correct sequence for visualisation of an onion cell is B -> A -> D -> C