| Choose the correct statement from the codes given below. |
| (i) Separation from extracellular medium allows the cells to maintain its chemical pool, orderliness of structure and reactions in contrast to disorderly distribution and randomly interacting molecules in the extracellular medium. |
| (ii) Cells are unable to recognise one another due to the presence of specific chemicals on their surface. |
| (iii) Cells of plant tissue are often connected with one another through cytoplasmic bridges called plasmodesmata. |
| (iv) Different cells of an organism communicate as well as exchange materials with one another. |
A) (ii) and (iii)
B) (iii) and (iv)
C) (i), (iii) and (iv)
D) (i), (ii), (iii) and (iv)
Correct Answer: C
Solution :
The ability to distinguish different neighbouring cells is important for organisms's function. Glycolipids are lipids with attached carbohydrates, which act as recognition sites during cell-cell interaction, as well as sites of attachment in a tissue. Glycoproteins are often integral membrane proteins and are also important for cell recognition.
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