Available Answers

1. 1.

   Choose the correct answer:

   1. Nucleus was discovered by
      1. Robert Hooke
      2. Robert Brown
      3. Leeuwenhoek
      4. Rudolf Virchow
   2. The shape of WBC's is
      1. cuboidal
      2. irregular
      3. spherical
      4. oval
   3. The 'suicide bags' of the cells are
      1. ribosomes
      2. mitochondria
      3. lysosomes
      4. nucleus
   4. The rounded body inside the nucleus is called
      1. nucleolus
      2. ribosomes
      3. golgi body
      4. vacuoles
   5. The longest cells are those of
      1. ostrich egg
      2. muscle cells
      3. nerve cells
      4. guard cells
   6. The elastic, semi-permeable living membrane that surrounds the protoplasm in cells is
      1. cell wall
      2. cell membrane
      3. nuclear membrane
      4. vacuole
   7. Which of the following are cell inclusions?
      1. Plastids
      2. Granules
      3. Vacuoles
         1. i only
         2. i and ii
         3. ii and iii
         4. iii only
2. 2.

   Give one word for the following:

   1. False foot of Amoeba
   2. Kidney-shaped cells in leaves of plants
   3. The unit for measuring cell
   4. The outer covering of the animal cell
   5. The form in which energy is stored in mitochondria
   6. The type of enzymes in lysosomes
   7. The colourless plastids of cells
   8. The milky liquid present in rubber
   9. An animal cell with no nucleus
   10. The type of cells in blood
3. 3.

   Fill in the blanks with suitable words:

   1. The covering of the vacuole is called _______________.
   2. The cavity of vacuole is filled with _______________.
   3. Chromatin fibres are made up of _______________.
   4. _______________ and _______________ fibre cells are long plant cells.
   5. Cell wall was discovered by _______________ _______________.
   6. Lysosomes contain _______________ enzymes.
   7. Cylindrical bodies of centrosomes are called _______________.
   8. The fluid part of the cytoplasm is called the _______________.
   9. The transparent substance in nucleus is _______________.
   10.  _______________ help in synthesis of proteins.
4. 4.

   Name the scientists who proposed the cell theory. What does the theory state?

5. 5.

   State the functions of the following cells: Red blood cells, muscle cells, nerve cells and guard cells.

6. 6.

   When an onion peel is seen under the microscope, what type of cells will you observe. Describe them.