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When apples are cut and exposed to air, the enzyme polyphenol oxidase catalyzes the oxidation of polyphenols in the apple to form o-quinones. The chemical equation for this reaction is:
Polyphenols + O2 → o-quinones + H2O
The o-quinones produced are further oxidized to form brown pigments, resulting in the browning of the apple flesh.
What else can I help you with?
Is bananas turning black a chemical or physical reaction?
The answer is actually microorganisms.In school we did a topic about it so it will be chemicals. Aleema hope it helpedxx
Is digesting a banana a chemical change?
I suppose so, it would be more correct to say it was due to a cellular change. Enzymes present in fruits, mainly polyphenol oxidase cause the browning in damaged fruit. Normally polyphenol oxidase works in plants as a defense against insects. When activated this enzyme turns phenols in the plant into quinones, these quinones then turn into melanins which have beneficial properties to the plant as an antibacterial, anti-fungal, and UV protection. Melanins are dark in color and so make the areas where they are present appear brown.In healthy plant tissue the phenolic compounds are stored in the vacuole of the cell, well separated from the polyphenol oxidase enzyme so no activity happens. However, when a banana is bruised by dropping onto a hard surface or simply overripening, the cells become damaged, the separating membranes are ruptured and polyphenol oxidase can access the phenolic compounds and start the process of turning them into quinones and then into melanins, making brown and black spots in the damaged areas.
What is the chemical equation for turning carbon dioxide into oxygen and carbon?
The equation is:2 CO2 ===========> 2 CO + O2
What is a balanced word equation for the reaction of cucumbers turning into pickles?
A chemical reaction for this process doesn't exist.
Answers to Word equations?
Chemical equation that represents a chemical reaction using chemical formulas and other symbols. It shows the reactants turning into products. Balancing is required to have an equal number of each type of atom on both sides.
Is bananas turning black a chemical or physical reaction?
The answer is actually microorganisms.In school we did a topic about it so it will be chemicals. Aleema hope it helpedxx
Is digesting a banana a chemical change?
I suppose so, it would be more correct to say it was due to a cellular change. Enzymes present in fruits, mainly polyphenol oxidase cause the browning in damaged fruit. Normally polyphenol oxidase works in plants as a defense against insects. When activated this enzyme turns phenols in the plant into quinones, these quinones then turn into melanins which have beneficial properties to the plant as an antibacterial, anti-fungal, and UV protection. Melanins are dark in color and so make the areas where they are present appear brown.In healthy plant tissue the phenolic compounds are stored in the vacuole of the cell, well separated from the polyphenol oxidase enzyme so no activity happens. However, when a banana is bruised by dropping onto a hard surface or simply overripening, the cells become damaged, the separating membranes are ruptured and polyphenol oxidase can access the phenolic compounds and start the process of turning them into quinones and then into melanins, making brown and black spots in the damaged areas.
What is the chemical equation for turning carbon dioxide into oxygen and carbon?
The equation is:2 CO2 ===========> 2 CO + O2
What is a balanced word equation for the reaction of cucumbers turning into pickles?
A chemical reaction for this process doesn't exist.
How do you keep pears from turning brown?
because of polyphenol oxidase which reacts on pear for sometime.Polyphenol oxidase (PPO) enzymes, also known as polyphenoloxidases, are able to catalyze the transformation of an array of aromatic compounds that have two adjacent phenolic groups on them. This includes a number of polyphenols in plants that act as antioxidants. These copper-containing enzymes oxidize the phenolic groups to reactive oxygen molecules known as quinones, which continue reacting with each other and other cellular factors to form brown spots known as melanin. This browning causes the deterioration of fruits and vegetables, resulting in large economic losses. Examples include the pearEnzymatic browningis not unique to pear. PPO - a mixture of monophenol oxidase and catechol oxidase enzymes - is present in nearly all plant tissues, and can also be found in bacteria, animals, and fungi. In fact, browning by PPO is not always an undesirable reaction; the familiar brown color of tea, coffee and cocoa is developed by PPO enzymatic browning during product processing.Tentoxin has also been used in recent research to eliminate the polyphenol oxidase activity from seedlings of higher plants. Enzymatic browning is not unique to apples. PPO - a mixture of monophenol oxidase and catechol oxidase enzymes - is present in nearly all plant tissues, and can also be found in bacteria, animals, and fungi.
What is the difference between a chemical formula and chemical equation?
Oh, dude, a chemical formula is like the recipe for a molecule, telling you what elements are in it and how many of each. A chemical equation, on the other hand, is like showing the whole cooking process, with reactants turning into products. So, like, one is the ingredients list, and the other is the step-by-step cooking instructions.
Albert remembers his teacher stressing that the arrow in a chemical equation does not mean equal instead he said the arrow meant what?
The arrow in a chemical equation represents the direction of the reaction, indicating that reactants are turning into products. It shows the flow of reactants converting into products, rather than implying equality between the two sides of the equation.
Answers to Word equations?
Chemical equation that represents a chemical reaction using chemical formulas and other symbols. It shows the reactants turning into products. Balancing is required to have an equal number of each type of atom on both sides.
What is an Airy equation?
An Airy equation is an equation in mathematics, the simplest second-order linear differential equation with a turning point.
What is the balanced chemical equation for a burned candle?
The balanced chemical equation for a burned candle is C25H52 (wax) + O2 (oxygen) -> CO2 (carbon dioxide) + H2O (water) + heat. This represents the combustion reaction that occurs when a candle burns, turning the wax and oxygen into carbon dioxide, water vapor, and releasing heat.
What makes apples go brown?
Oxidation causes apples to turn brown. The browning you see is a result of the polyphenol oxidase (PPO) enzymes oxidizing.
Is turning cloudy a chemical change?
A solution turning cloudy is evidence of a chemical change.
