Cell - Structure and Functions Worksheet-6

Cell - Structure and Functions Worksheet-6

1. In a biology lecture, the teacher was dictating the organelles of a cell as endoplasmic reticulum, mitochondria, nucleus, ribosome, centriole and centrosome. Which cell was she referring?

(a) Prokaryoticcell

(b) Plant cell

(c) Animal cell

(d) It is not possible to predict from the given data.

2. You are given two microscopic slides containing sample muscle cells from a mouse and from a whale. What will you observe?

(a) The whale cells are larger than mouse cells

(b) The mouse cells are larger than whale cells

(c) The cells are of different colours

(d) The cells are of similar sizes.

3. The given figure shows a typical animal cell. What is the function of the part marked 'X'?

(a) It contains the genes

(b) New substances are formed here

(c) It gives the cell a regular shape

(d) It controls all the activities of the cell.

4. Look at the given cell carefully. Identify the function of the part marked 'Y'.

(a) It controls the movement of materials in and out of the cell

(b) It controls all the activities of the cell

(c) It contains many cell parts

(d) It provides protection to the cell.

5. Which of the following is not true about cells?

(a) Cells do not live forever

(b) New cells are produced to replace the old cells which die as well as for the growth of an organism

(c) If the size of an organism is bigger, the size of its cell is also bigger

(d) Different types of cells have different functions.

6. Which figure shows a human cell correctly labelled?

(a)

(b)

(c)

(d)

7. Which of the following matches is incorrect?

(a) Organelle:Ribosome

      Function:Secretion of enzymes

      Presence:Plant & animal cell

(b) Organelle:Mitochondria

      Function:Site of respiration

      Presence:Animal cell only

(c) Organelle:Chloroplast

      Function:Storage of cell sap

      Presence:Plant cell

(d) All of these

8. What is one likely function of a centriole?

(a) To hold the fibres of spindle

(b) To send messages to the nucleus to divide

(c) To divide the cytoplasm

(d) To cause the chromosomes to become shorter and thicker.

9. What is one major difference between a human skin cell and a human egg cell?

(a) The egg cell has twice as many chromosomes as the skin cell

(b) The egg cell has half as many chromosomes as the skin cell

(c) The skin cell has no genetic information in its chromosomes

(d) Only the egg cell has a nucleus.

10. Which of the following statements is/are true regarding cell structure?

(i) The nucleoplasm and the cytoplasm together make up the protoplasm.

(ii) Chloroplasts are type of plastids, which occurs in plant cells.

(iii) In many multicellular organisms, cells have projections called as cilia and flagella.

(iv) Cell destruction occurs by centrosomes.

(a) (i) & (ii)                                    (b) (i), (ii) & (iii)

(c) (i) only                                      (d) (iii) & (iv)

Answer Key:

(1)-(c); (2)-(d); (3)-(b); (4)-(d); (5)-(c); (6)-(c); (7)-(d); (8)-(a); (9)-(b); (10)-(a)