The enzyme that converts retinol to retinal and ethanol to ...

[ashley]

The enzyme that converts retinol to retinal and ethanol to acetylaldehyde contains four ____ atoms.
 A) copper
  B) iodine
  C) zinc
  D) iron

Question 2

Blood antibody testing for food allergies ____.
 A) is the most accurate method
  B) predicts lack of allergy better than actual allergy
  C) should be considered with other types of evidence
  D) is rarely clinically meaningful

[covalentbond]

Answer to Question 1

C

Answer to Question 2

C

[ashley]

Thanks

[covalentbond]

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