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Life Processes — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceLife Processes5 Marks
Question
Consider the following chemical reactions which take place in different organisms/ tissues under various conditions:
  1. Glucose → Respiration → Respiration Ethanol + Carbon-dioxide + Energy.
  2. Glucose → Respiration → Respiration Carbon-dioxide + Water + Energy.
  3. Glucose → Respiration → Respiration Lactic acid + Energy.
  1. Name one organism which respires according to equation (i) above.
  2. Name one organism which respires according to equation (ii) above.
  3. When and where does respiration represented by equation (iii) above take place?
  4. Which equation/ equations represent aerobic respiration?
  5. Which equation/ equations represent anaerobic respiration?
  6. Which of the above reactions produces the maximum amount of energy?
✓

Answer

  1. Yeast shows anaerobic respiration.
  2. Humans show aerobic respiration.
  3. In humans beings, during high muscular activity, the respiration represented by equation (iii) occurs. It occurs in the muscle tissue.
  4. Equation (ii) represents aerobic respiration.
  5. Equation (i) represents anaerobic respiration.
  6. Aerobic respiration, i.e. the reaction represented by equation (ii), produces maximum amount of energy.

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