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Respiration In Plants — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYRespiration In Plants3 Marks
Question
Define the following:
  1. Respiration.
  2. Respiratory substrate.
  3. How does a tree trunk exchange gases with the environment although it lacks stomata?
  4. Which is the most important energy carrier? Is this compound mobile?
  5. Name the major respiratory substrates used by most organisms. It unavailable at time, what other substances can be used for respiration?
✓

Answer

  1. Enzymes controlled process of biological oxidation of various organic food materials in a living cell, producing CO2 and H2O, and releasing energy in the form of ATP, is called respiration.
  2. The organic compounds catabolised in the living cells to release energy are called respiratory substrates.
  3. Due to the presence of lenticels in the periderm which is connected internally to the network of parenchyma with outside world.
  4. The most important energy carrier is ATP. This energy rich compound is mobile, but cannot pass from one cell to another.
  5. Carbohydrates in condition of its unavailability, proteins, fats and organic acids can be used.

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