Available Answers

1. 1.

   Fill in the blanks.

   1. _____________ is the process in which glucose is oxidized in the presence of oxygen to release energy.
   2. The glucose combines with oxygen to produce _____________, _____________  and _____________.
   3. In _____________ respiration, glucose is not completely oxidized.
   4. In anaerobic respiration, glucose is oxidized to form carbon dioxide, _____________ and ATP energy molecules.
   5. In _____________, energy is released in the form of heat and not stored for future use.
2. 2.

   Forests are called the lungs of the earth. Why?

3. 3.

   Tick the appropriate answer.

   1. The by-products of photosynthesis are
      1. carbon dioxide, water and 38 ATP molecules.
      2. carbon dioxide, ethyl alcohol and 2 ATP molecules.
      3. oxygen and glucose.
      4. carbon dioxide and glucose.
   2. How many ATP molecules are produced by the oxidation of 2 molecules of glucose?
      1. 38
      2. 76
      3. 2
      4. 40
   3. In aerobic respiration, the by products are
      1. carbon dioxide, water and 2 ATP molecules.
      2. carbon dioxide, ethyl alcohol and 2 ATP molecules.
      3. carbon dioxide, water and 38 ATP molecules.
      4. oxygen, water and 38 ATP molecules.
   4. Cellular respiration in plants takes place in the 
      1. chloroplast.
      2. endoplasmic reticulum.
      3. golgi bodies.
      4. mitochondria.
   5. Plants that grow in salty water have specialized roots called
      1. pneumatophores.
      2. pseudopodia.
      3. lenticels.
      4. root hairs.
4. 4.

   Fill in the blanks.

   1. The energy released during respiration is stored in energy-rich chemical substances called _________________.
   2. The entire process of respiration takes place partially in cytoplasm and partially in the _________________.
   3. In aerobic respiration, glucose is completely oxidized to form _________________ and water.
   4. Only _________________ ATP molecules are released by the oxidation of 1 glucose molecule during anaerobic respiration.
   5. When the guard cells lose water, they lose their turgidity and the stomata _________________.
5. 5.

   Match the following.

   1. aerobic respiration	a. found in the old and mature roots and hard woody stems
   2. anaerobic respiration	b. roots that grow out of the surface of water
   3. stomata	c. releases carbon dioxide, ethyl alcohol and 2 ATP molecules
   4. lenticels	d. found in green leaves and stems
   5. pneumatophores	e. releases carbon dioxide, water and 38 ATP molecules

    

6. 6.

   Write true or false. Correct the faalse statements.

   1. During anaerobic respiration, complete oxidation of glucose takes palce.
   2. Respiration takes place only in the leavess of a plant.
   3. When the guard cells are full of water, they swell and bulge outwards opening the stomata.
   4. The exchange of gases takes plaace in the leaves by the process of diffusion.
   5. In photosynthesis, no energy is released.