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प्रश्न
When a substrate is being metabolized, why does not all the energy that released in one step. It is released in multiple steps.What is the advantage of step-wise release?
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उत्तर
The complete combustion of glucose, which produces CO2 and H2O as end products, yields energy most of which is given out as heat.
C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy
If this energy is to be useful to the cell, it should be able to utilise it to synthesise other molecules that the cell requires. The strategy that the plant cell uses is to catabolise the glucose molecule in such a way that not all the liberated energy goes out as heat. The key is to oxidise glucose not in one step but. in several small steps enabling some steps to be just large enough such that the energy released can be coupled to ATP synthesis.
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संबंधित प्रश्न
What are respiratory substrates?
Name the most common respiratory substrate.
Glycolysis is a process ___________.
One same common function is performed by?
Name the following:
Oxidative breakdown of carbohydrates to release energy.
Why is it usually difficult to demonstrate respiration in green plants?
How is tilling of the soil useful for the crops growing in it?
Fill in the blank :
_________ are the openings found on older stems.
Fill in the blank:
_____________ is a respiratory substrate
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_____________ is a chemical which absorbs oxygen of the air.
How do the following structures help in respiration in plants?
Lenticels _____________
How do the following structures help in respiration in plants?
Stomata _____________
The following diagram refers to an apparatus which is used to demonstrate a physiological process:
What is the purpose of keeping boiled peas soaked in a disinfectant in test tube Y?
What do you understand by respiration?
Name the following:
The process of living beings which is concerned with the release of energy for use in the body.
The roots of a plant take up oxygen from the ______ trapped between the ______ particles.
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Observe the figure carefully and answer the following questions.
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- In which jar, will the amount of CO2 be the lowest and why?
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Why did the dough smell sour?
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Explain the term “Energy Currency”. Which substance acts as energy currency in plants and animals?
Respiration requires O2. How did the first cells on the earth manage to survive in an atmosphere that lacked O2?
RuBP carboxylase, PEP carboxylase, Pyruvate dehydrogenase, ATPase, cytochrome oxidase, Hexokinase, Lactate dehydrogenase.
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How does a tree trunk exchange gases with the environment although it lacks stomata?
