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Answers
1. Give the overall chemical equation for the two kinds of respiration in plants :
(i) Aerobic (ii) Anaerobic
Aerobic respiration is the aerobic catabolism of nutrients to carbon dioxide, water, and energy, and involves an electron transport system in which molecular oxygen is the final electron acceptor. The overall reaction is: C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy (as ATP).
(ii) Cellular respiration is the chemical reaction in which glucose and oxygen are turned into water, carbon dioxide, and energy (ATP). ... C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP is the complete balanced chemical formula for cellular respiration.
2.Mention any one difference other than those reflected in the two chemical equations given above.
One difference between aerobic and anaerobic respiration is that aerobic respiration takes place in the presence of oxygen whereas anaerobic can proceed without the use of oxygen
3. Certain organisms respire only anaerobically throughout their lives. Name any two such organisms.
Two examples of obligate anaerobes are Clostridium botulinum and the bacteria which live near hydrothermal vents on the deep-sea ocean floor. Aerotolerant organisms, which cannot use oxygen for growth, but tolerate its presence. Facultative anaerobes, which can grow without oxygen but use oxygen if it is present.