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When an apple is cut (or bruised), oxygen is introduced into the injured plant tissue. When oxygen is present in cells, polyphenol oxidase (PPO) enzymes in the chloroplasts rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary products. O-quinones then produce the well documented brown color by reacting to form compounds with amino acids or proteins, or they self-assemble to make polymers.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoThe apple is oxidizing. Chemicals in its flesh are interacting with oxygen in the air; the result is a black or brown color.
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What is an hypothesis for cutting an apple?
Hypothesis 1: When you disturb the skin of an apple by cutting the apple into half, the exposed area will turn brown due to exposure to air.Hypothesis 2: If you snugly wrap or cover the exposed area of an apple after cutting it (disturbing the skin), you can slow down how fast the inside turns brown. Hypothesis 3: If you remove all of the skin of an apple and let it sit in the air, the outside will turn brown but the inside will not turn brown at the same rate. Hypothesis 4: If you remove all the skin of an apple AND slice the whole apple into pieces, all sides exposed to air will turn brown; if some slices are thicker, the inside will turn brown more slowly than the exposed outside areas.
When an apple is eaten why does it turn black?
The juices in the apple react with the oxygen in the air, causing the flesh to discolour.
What color does an apple turn under a blue light?
BLACK because the apple absorbs the blue light and there would be no light to reflect.
Is cutting apple A physical change or chemical change?
It is a chemical change because cut apples turn brown through the process of oxidation.
Is an apple cut a chemical or physical change?
Cutting an apple is a physical change
Do your hands turn black when cutting frest basil?
yes be cause all the fluids all ready capture ur handAnother response:No, normally fresh green basil does not turn one's hands black. (Some of the purple or "black" varieties - such as "Black Opal" - theoretically could have this effect, but that is doubtful.) You might want to be careful that the herb you are cutting is actually basil, which is easily identified by its fragrance.
How to get mini ben?
you plant black snap apple black snap apple black snap apple
What is the moshling code for mini ben?
black snap apple black snap apple black snap apple
What colour forms when cutting apple and oxidised?
Brown
How do you cut with oxy fuel cutting?
turn it on and start cutting
Why does apple become dry after cutting?
Because oxidation kicks in after the seal (the skin/peel) is broken. To prevent this, After cutting try to use the apple the same day you cut it.
How to kill a crab apple tree?
You can kill a crab apple tree by cutting it down with an axe.
