3E Food Tests

Which of the following tests for starch?

• Iodine test

• Benedict's test

• Biuret test

• Ethanol emulsion test

Which of the following tests for protein?

• Iodine test

• Benedict's test

• Biuret test

• Ethanol emulsion test

Which of the following tests for reducing sugars?

• Iodine test

• Benedict's test

• Biuret test

• Ethanol emulsion test

Which of the following tests for lipids?

• Ethanol emulsion test

• Iodine test

• Benedict's test

• Biuret test

When starch is present, iodine solution turns _______________.

• yellow-brown

• blue-black

• purple

• brick-red

When glucose is present, iodine solution turns _______________.

• yellow-brown

• blue-black

• purple

• brick-red

When large amounts of glucose is present, Benedict's solution turns _____________.

• blue

• yellow

• brick-red

• green

When protein is present, biuret solution turns ______________.

• purple

• blue-black

• blue

• brick-red

What do you observe when the biuret test is carried out with amino acids?

• brick-red solution forms

• blue solution forms

• blue-black solution forms

• yellow-brown solution forms

If there are no reducing sugars, the Benedict's solution remains___________.

• brick-red

• blue

• green

• orange