Question

You can buy an additive called Fruit Fresh at the grocery store to prevent browning of cut fruits. It primarily contains citric acid. You can achieve the same results by squeezing lemon juice (with also contains citric acid) over fruit. Fruit Fresh and phenylthiourea both inhibit the formation of quinone (product), but their mechanism is much different. Think about how enzymes work… Propose a hypothesis as to how Fruit Fresh inhibits the formation of quinone.

Name: you can buy an additive called fruit fresh at the grocery store to prevent browning of cut fruits it primarily contains citric acid you can achieve the same results by squeezing lemon juice 24434
Uploaded: 2022-05-30T16:27:45-08:00
Duration: 3 min 1 s
Channel: Sri K
Description: you can buy an additive called fruit fresh at the grocery store to prevent browning of cut fruits it primarily contains citric acid you can achieve the same results by squeezing lemon juice 24434

          You can buy an additive called Fruit Fresh at the grocery store to prevent browning of cut fruits. It primarily contains citric acid. You can achieve the same results by squeezing lemon juice (with also contains citric acid) over fruit. Fruit Fresh and phenylthiourea both inhibit the formation of quinone (product), but their mechanism is much different. Think about how enzymes work…
Propose a hypothesis as to how Fruit Fresh inhibits the formation of quinone.

Added by Kevin P.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Sri K

05/30/2022

Step 1

When fruits are cut, enzymes such as polyphenol oxidase (PPO) are exposed to oxygen, leading to the oxidation of phenolic compounds and the formation of quinones, which cause browning. Show more…

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You can buy an additive called Fruit Fresh at the grocery store to prevent browning of cut fruits. It primarily contains citric acid. You can achieve the same results by squeezing lemon juice (with also contains citric acid) over fruit. Fruit Fresh and phenylthiourea both inhibit the formation of quinone (product), but their mechanism is much different. Think about how enzymes work… Propose a hypothesis as to how Fruit Fresh inhibits the formation of quinone.