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Observe the apple slices turn brown |
Answer» <html><body><p>apple is cut (or bruised), oxygen is <a href="https://interviewquestions.tuteehub.com/tag/introduced-2121226" style="font-weight:bold;" target="_blank" title="Click to know more about INTRODUCED">INTRODUCED</a> into the injured plant tissue. When oxygen is present in <a href="https://interviewquestions.tuteehub.com/tag/cells-25681" style="font-weight:bold;" target="_blank" title="Click to know more about CELLS">CELLS</a>, polyphenol oxidase (PPO) enzymes in the chloroplasts <a href="https://interviewquestions.tuteehub.com/tag/rapidly-2972968" style="font-weight:bold;" target="_blank" title="Click to know more about RAPIDLY">RAPIDLY</a> oxidize <a href="https://interviewquestions.tuteehub.com/tag/phenolic-2220486" style="font-weight:bold;" target="_blank" title="Click to know more about PHENOLIC">PHENOLIC</a> compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary <a href="https://interviewquestions.tuteehub.com/tag/products-18828" style="font-weight:bold;" target="_blank" title="Click to know more about PRODUCTS">PRODUCTS</a>.</p></body></html> | |