Question

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell?

1) Size of the cells
2) Presence of a cell wall
3) Presence of a nucleus
4) Ability to perform photosynthesis

Answer 1

The main difference in cell structure between an onion cell and a human cheek cell is the presence of a cell wall in the onion cell. Option 2 is correct answer.

Step-by-step explanation:

The main difference in cell structure between an onion cell, which is a plant cell, and a human cheek cell, which is an animal cell, is the presence of a cell wall.

An onion cell has a robust cell wall that provides structure and supports the plant. This cell wall is composed of cellulose and is a characteristic feature of plant cells that is absent in animal cells. Moreover, while both onion cells and human cheek cells have a nucleus and cytoplasm, only plant cells like the onion contain chloroplasts responsible for photosynthesis.

However, the ability to perform photosynthesis is not the main structural difference since it is related to function rather than structure. Therefore, the correct option is (2) Presence of a cell wall.