Available Answers

1. 1.

   Tick mark (√) the correct answers in the following

   1. The word respiration simply means the taking in and expulsion of air from the organism, but in the wider sense it means:
      1. removal of energy
      2. loss of energy by food
      3. provision of energy
      4. oxidation of food to provide energy
   2. Apart from the stomata, through which other way can oxygen enter the plants:
      1. through diffusion
      2. through a hole in the stem
      3. through lenticels
      4. through the scars on the leaves
   3. The energy in respiration is released in the form of:
      1. chemical energy
      2. heat energy
      3. chemical and heat energy
      4. light energy
   4. Plants respire either aerobically or anaerobically. In anaerobic respiration the products are:
      1. carbon dioxide, water and energy
      2. carbon dioxide and energy
      3. carbon dioxide, oxygen and energy
      4. carbon dioxide, alcohol and energy
   5. The breakown reactions in repiration take place only in the presence of:
      1. enzymes, co-enzymes and co-factors
      2. hormones
      3. enzymes
      4. vitamins
   6. In a eukaryotic cell, glycolysis takes place:
      1. inside the mitochondria
      2. in the cytoplasm
      3. inside the Golgi complex
      4. inside the endoplasmic reticulum
   7. In glycolysis, ultimately:
      1. fructose is converted into glucose
      2. glucose is converted to pyruvic acid
      3. protein is converted into glucose
      4. startch is converted glucose
   8. The respiratory organelle is:
      1. plastid
      2. ribosome
      3. lysosome
      4. mitochondria
   9. Glycosis occurs in:
      1. Mitochondria
      2. Cytoplasm
      3. Both in mitochondria and cytoplasm
      4. Lysosome
2. 2.

   What is respiration?

3. 3.

   Name the following :

   1. The type of respiration which proceeds even without oxygen.
   2. The type of respiration in which free oxygen is used for complete oxidation of glucose
   3. The chemical which is used in certain experiments for absorbing carbon dioxide of the air
   4. The aqueous solution which turns milky when combined with carbon dioxide.
4. 4.

   State whether the following sentences are True or False. If false, write the correct statement by changing only the last word written in bold letters.

   1. The leaves of the plant obtain oxygen from the atmosphere through lenticels.
   2. The breakdown of glucose into carbon dioxide and water does not occur in a single step, but in a series of chemical steps.
   3. All activities inside the living cell need energy which is available in the form of ADP.
   4. In plants, one of the end products of respiration is lactic acid.
5. 5.

   Write in chemical symbols, the equation for respiration.

6. 6.

   Match the items in column A with those of column B.

   Column A	Column B
   (a) Fermentation (.....)	(i) Mitochondria
   (b) Glycolysis (.....)	(ii) 38 molecules of ATP per molecule of glucose
   (c) Kreb's cycle (.....)	(iii) Anabolic process
   (d) Aerobic respiration (.....)	(iv) Yeast
   (e) Respiration (.....)	(v) Cytoplasm
   (f) Photosynthesis (.....)	(vi) Catabolic process
   (g) Anaerobic respiration (.....)	(vii) 2 molecules of ATP per molecule of glucose