Brown fruit Science project

What is the common scientific name for calling the process of a fruit becoming brown?

• Brown colouring

• melanin colouring

• enzymatic browning

• enzyme browning

Melanin is...

• The name of an enzyme

• a pigment found in human hair, skin and eyes responsible for dark brown colour

• The name of the scientist who discovered enzymatic browning

• the name of a reaction between oxygen and an enzyme

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

When oxygen reacts with an enzyme to make the fruit brown, the chemical reaction is called

• oxidation

• oxation

• melanin

• browning

Fruit browning happens because an enzyme called polyphenol oxidase (PPO) reacts with...

• carbon dioxide in the air

• water

• oxygen

• sugar

Tags

NGSS.MS-PS1-2

What condition is NOT good to prevent (stop) fruit browning?

• removing the PPO enzyme from fruits (genetically modified)

• wrapping the fruit in paper

• keeping the fruit in acidic conditions

• keeping the fruit in cold conditions

What can make the reaction of PPO enzyme and oxygen happen in a fruit?

• the fruit is left on the table

• the fruit is cut or falls on the ground

• the fruit is put in the fridge

• the fruit is kept in acidic conditions (like lemon juice)

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

In which conditions do you expect an apple slice to turn brown faster?

• in lemon juice

• in air (no liquid)

• in water

• in vinegar

Tags

NGSS.MS-PS1-2

To measure the amount of liquid in your experiment, what equipment is best to use?

• a weighing scale

• a measuring cylinder

• a spoon

• your hands

Do you think your experiment will work?

• Yes!

• No!

• I think there will be problems

• What experiment?

Tags

NGSS.MS-ETS1-4

Do you think your oral presentation next week will be interesting?

• Yes, because I will try to prepare it well

• No, because I won't prepare it well