Available Answers

1. 1.

   Tick marks (√) the correct answers in the following

   1. Energy is stored in the cell in the form of molecules called:
      1. DNA
      2. RNA
      3. ATP
      4. ADP
   2. One of the following is absent in a plant cell:
      1. Cell wall
      2. Centrosome
      3. Plastids
      4. Mitochondria
   3. One of the following is present in animal cells only:
      1. Cell wall
      2. Plastids
      3. Centriole
      4. Chloroplast
   4. Potato cells are rich in:
      1. Leucoplasts
      2. Chromoplasts
      3. Chloroplasts
      4. Aleuroplasts
   5. Cristae are present in:
      1. Centrosome
      2. Mitochondria
      3. Nucleus
      4. Golgi bodies.
   6. Centrioles are present in:
      1. Centrosomes
      2. Ribosomes
      3. Lysosomes
      4. Chromosomes
   7. The cell activities are controlled by:
      1. Cytoplasm
      2. Plastids
      3. Nucleus
      4. Mitochondria
   8. One of the following stores RNA:
      1. nucleolus
      2. Nucleus
      3. Mitochondria
      4. Plastids
   9. Genes consist of:
      1. RNA
      2. DNA
      3. Protein
      4. Cellulose
   10. The number of Chromosomes in Ascaris is:
       1. 20
       2. 02
       3. 12
       4. 200.
   11. The organelles where protein synthesis takes places in a cell, are
       1. Golgi apparatus
       2. Mitochondria
       3. Centrosome
       4. Ribosomes
   12. The organelles where energy is stored in the cell, are
       1. Golgi apparatus
       2. Mitochondria
       3. Centriole
       4. Lysosomes
   13. The organelles which trap solar energy, are
       1. Centrioles
       2. Plastids
       3. Centrosomes
       4. Nucleus.
   14. The organelles which carry the hereditary information are
       1. Centrioles
       2. Lysosomes
       3. Chromatin fibres
       4. Ribosomes.
2. 2.

   Complete the statement by matching the items under Column A with those under Column B (Write the matching number in the brackets given).

   COLUMN A	COLUMN B
   (a) The first microscope was designed by (.........)	(1) structural and functional unit of life
   (b) Rudolf Virchow (1858) said that (........)	(2) an electron microscope
   (c) Theodor Schwann stated that (......)	(3) Robert Hooke's microscope
   (d) The compound microscope of today is an improvement on (........)	(4) Schwann and Schleiden
   (e) The modern microscope which can magnify an object by about 100,000times is (......)	(5) examined a thin slice of cork and observed "box like" compartments in it.
   (f) The cell is the	(6) all animals and plants are made up of cells which serve as the units of structure and function
   (g) The cell theory was given by (.........)	(7) Van Leeuwenhoek
   (h) Robert Hooke (........)	(8) all cells arise from pre-existing cells.

    

3. 3.

   State briefly the three major points of the cell theory as proposed by Schwann and Schleiden and modified by Virchow.

4. 4.

   State two differences between a simple microscope and a compound microscope.

5. 5.

   Give one example of each of the following:

   1. Smallest cell
   2. Longest cell
   3. Largest cell
   4. Cell with irregular shape
   5. A contractile cell
6. 6.

   State whether the following statements are True (T) or False (F):

   1. Cytoplasm is the part of the cell between the nucleus and the cell membrane.
   2. Chromosomes are structures found in cytoplasm.
   3. All cells have a cell wall.
   4. Centrosome plays a role in cell division.
   5. Ribosomes are 'sites' in a cell where fat is synthesized.
   6. Endoplasmic reticulum is a network of single membrane.
   7. Ribosomes are the sites of protein synthesis.
   8. Golgi bodies are the store houses of energy.
   9. Lysosomes are also called as the suicidal bags of the cell.
   10. The energy currency of the cell is D.N.A.
   11. Centrosomes participate in cell-division.