Question

Different cells have different sizes. Arrange the following cells in ascending order of their size and select the correct option:

(i) Mycoplasma (ii) Ostrich egg
(iii) Human RBCs (iv) Bacteria

• A. (i) $\to$ (iv) $\to$ (iii) $\to$ (ii)
• B. (i) $\to$ (iii) $\to$ (iv) $\to$ (ii)
• C. (ii) $\to$ (i) $\to$ (iii) $\to$ (iv)
• D. (ii) $\to$ (ii) $\to$ (i) $\to$ (iv)

Answer 1

Answer: (A)

(i) $\to$ (iv) $\to$ (iii) $\to$ (ii)

• The smallest cell is Mycoplasma (0.1-0.5$\mu m$).
• The bacterial cell measures 3-5$\mu m$ in length.
• Erythrocytes are 6-8$\mu m$ in diameter.
• The largest cell is the egg of an ostrich.

So, the correct answer is option "(i) $\to$ (iv) $\to$ (iii) $\to$ (ii)".