RDN Exam Prep UPDATED ACTUAL
Exam Questions and CORRECT Answers
What device measures percentage of sugar? - CORRECT ANSWER - Brix hydrometer
What ethylene gas do? - CORRECT ANSWER - accelerates ripening of fruits during
storage
When heated in the acid rxn, what is formed? - CORRECT ANSWER - pheophytin
When food is heated in an alkaline rxn, what is formed? - CORRECT ANSWER -
chlorophyllin
what color is chlorophyllin - CORRECT ANSWER - bright green
What color is pheophytin? - CORRECT ANSWER - olive green
Alkalinity does what to vegetables? - CORRECT ANSWER - makes them mushy, and loss
of water soluble vitamins
Why does clorophyllin make vegetables mushy? - CORRECT ANSWER - hemicelluose is
broken down.
What antioxidant contributes to red color in tomatoes and watermelon? - CORRECT
ANSWER - lycopene
What are the two kinds of flavonoids? - CORRECT ANSWER - Anthocyanins and
Anthoxanthin
, What happens to anthocyanins when put in acidic solution? - CORRECT ANSWER -
turns bright red.
What happens to anthocyanins when put in alkaline solution? - CORRECT ANSWER -
Turns blueish.
What happens to anthoxanthins (flavones) when put in acidic solution? - CORRECT
ANSWER - colorless
What happens to anthoxanthins (flavones) when put in alkaline solution? - CORRECT
ANSWER - turns yellow
Anthocyanins color? - CORRECT ANSWER - Red, blue, purple
greatly affected by changes in pH
flavonoids - CORRECT ANSWER - phytochemicals. It is what causes the color of
anthocyanins and flavones
Lycopene color - CORRECT ANSWER - Red pigment
Anthoxanthins or flavones color? - CORRECT ANSWER - white or yellow
Canned fruits and vegetables:
What is Grade A? - CORRECT ANSWER - desserts, salads (fancy)
Canned fruits and vegetables:
What is Grade B? - CORRECT ANSWER - processed (choice)
Canned fruits and vegetables:
Exam Questions and CORRECT Answers
What device measures percentage of sugar? - CORRECT ANSWER - Brix hydrometer
What ethylene gas do? - CORRECT ANSWER - accelerates ripening of fruits during
storage
When heated in the acid rxn, what is formed? - CORRECT ANSWER - pheophytin
When food is heated in an alkaline rxn, what is formed? - CORRECT ANSWER -
chlorophyllin
what color is chlorophyllin - CORRECT ANSWER - bright green
What color is pheophytin? - CORRECT ANSWER - olive green
Alkalinity does what to vegetables? - CORRECT ANSWER - makes them mushy, and loss
of water soluble vitamins
Why does clorophyllin make vegetables mushy? - CORRECT ANSWER - hemicelluose is
broken down.
What antioxidant contributes to red color in tomatoes and watermelon? - CORRECT
ANSWER - lycopene
What are the two kinds of flavonoids? - CORRECT ANSWER - Anthocyanins and
Anthoxanthin
, What happens to anthocyanins when put in acidic solution? - CORRECT ANSWER -
turns bright red.
What happens to anthocyanins when put in alkaline solution? - CORRECT ANSWER -
Turns blueish.
What happens to anthoxanthins (flavones) when put in acidic solution? - CORRECT
ANSWER - colorless
What happens to anthoxanthins (flavones) when put in alkaline solution? - CORRECT
ANSWER - turns yellow
Anthocyanins color? - CORRECT ANSWER - Red, blue, purple
greatly affected by changes in pH
flavonoids - CORRECT ANSWER - phytochemicals. It is what causes the color of
anthocyanins and flavones
Lycopene color - CORRECT ANSWER - Red pigment
Anthoxanthins or flavones color? - CORRECT ANSWER - white or yellow
Canned fruits and vegetables:
What is Grade A? - CORRECT ANSWER - desserts, salads (fancy)
Canned fruits and vegetables:
What is Grade B? - CORRECT ANSWER - processed (choice)
Canned fruits and vegetables:
