Available Answers

1. 1.

   Multiple-Choice Questions

   Tick (√) the correct option:

   1. The basic structural and functional unit of an organism is called
      1. cell.
      2. tissue.
      3. organs.
      4. none of the above.
   2. The living covering present in both the plant and animal cells
      1. cellulose wall
      2. chitin wall
      3. cell wall
      4. plasmalemma
   3. Which cell organelle controls all the functions of the cell?
      1. Mitochondria
      2. Ribosomes
      3. Nucleus
      4. Golgi bodies
   4. Plastids are found in most of the plants except
      1. Fungi
      2. Sponges
      3. Euglena
      4. Algae
   5. Vacuoles help in
      1. osmoregulation
      2. floating
      3. stabilisation
      4. reproduction
   6. The single membrane binding a vacuole is known as
      1. baccillus.
      2. cocci.
      3. tonoplast.
      4. vibrio.
   7. Small openings present on the leaves that help in exchange of gases
      1. stomata
      2. guard cells
      3. vascular cells
      4. none of the above
   8. Which cell organelle is known as kitchen of the cells?
      1. Mitochondria
      2. Ribosomes
      3. Nucleus
      4. Plastids
   9. The egg of a hen is a
      1. cell
      2. tissue
      3. organ
      4. organ system
   10. A unicellular organism with irregular shape is
       1. Amoeba
       2. Paramecium
       3. Euglena
       4. bacteria
2. 2.

   Fill in the blanks:

   1. ___________________ are the lower external layer of cells in a leaf.
   2. The liquid present in the nucleus is known as ___________________ and is enclosed by ___________________.
   3. Golgi apparatus are called ___________________ in plants.
   4. In plants, ___________________ occupies almost 90% of the space of the cell in the centre.
   5. Chloroplasts have stacks of membrane-bound flattened sacs known as ___________________.
3. 3.

   Tick (√) the correct and cross (X) the wrong statement:

   1. The pattern made by cork cells resembles the cells of a honeycomb.
   2. Cell membrane is made of non-living substance.
   3. Nucleus is located at the centre of the cell.
   4. Stomata are surrounded by two guard cells.
   5. Cytoplasm is a dry and hard substance.
4. 4.

   Match the following:

   Column A	Column B
   1. Mitochondria	(a) Cristae
   2. Ribosome	(b) Protein synthesis
   3. Palisade cells	(c) Chloroplast
   4. Vacuoles	(d) Osmoregulation
   5. Stomata	(e) Guard cells

    

5. 5.

   Find the odd one out:

   1. Epidermis, nucleus, Golgi bodies, vacuoles.
   2. Tonoplast, cell sap, vacuole, grana.
   3. Mitochondria, cristae, oxysomes, ribosomes.
6. 6.

   Name the type of microscope that uses light when magnifying objects.