Question

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? A. An onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. B. A human cheek cell contains chloroplasts. C. An onion cell has a cell wall. D. There is no difference between an onion cell and a human cheek cell.

Answer 1

Answer:

C. An onion cell has a cell wall.

Explanation:

• One of the major difference between onion and cheek cell is the presence of a cell wall in the onion cell.
• The reason for this is that onion cell is a plant cell whereas cheek cell is an animal cell.
• A cell wall is absent from an animal cell but it is essential for a plant cell as plants are immobile and thus require the protection of cell wall to survive in conditions such as extreme temperatures, drought, etc.
• On the other hand, there is no need for a rigid cell wall in animals.

Answer 2

The correct answer is "C".

Onion cell is a plant cell and human cheek cell is an animal cell. Hence, onion cell has a cell wall but not in human cheek cells because animal cells do not have cell wall. Both cells have single nucleus. Since, human cheek cell is an animal cell, chloroplasts are cannot be seen in the human cheek cells.