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Respiration in Plants

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Why the cut apple becomes dark ?

When apple is cut, oxygen from the air reacts with the iron in the apple cells, forming iron oxides. This is just like rust that forms on the surface of iron objects. An enzyme called polyphenol oxidase (that's present in these cells) helps make this reaction go faster. Thus, apple becomes dark when cut. 
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 Where does Krebs’ cycle takes place ?

Mitochondria.
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What is the nature of enzymes present in Mitochondria ?

 Oxidative enzymes.
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Name the main processes for cell respiration.

Glycolysis, oxidation of pyruvate, Krebs’ cycle, electron transport chain and ATP synthesis.
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Where does glycolysis occur in a cell ?

Cytoplasm.
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Name the basic substrate for cell respiration.

Glucose.
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