Cell structure and function Worksheet-1

Cell structure and function Worksheet-1

Plasma membrane is the outermost covering of the cell that separates the contents of the cell from its external environment. The plasma membrane allows or permits the entry and exit of some materials in and out of the cell. It also prevents movement of some other materials. The cell membrane, therefore, is called a selectively permeable membrane.

1. Which is the outermost covering of the cell?

A. Cell wall                                     B. Middle layer

C. Cell membrane                        D. All of these

E. None of these

2. Plasma membrane is-

A. Permeable                                 B. Semi-permeable

C. Selectively permeable            D. Impermeable

3. Which of these allows the entry and exit of some materials in and out of the cell?

A. Cell wall                                     B. Cytoplasm

C. Cell membrane                        D. Nucleus

E. All of these

4. Which structure separates the contents of the cell from its external environment

A. Cell membrane                        B. Plasma membrane

C. Both of these                             D. None of these

Answer Key:

1. C
2. C
3. C
4. C