Biochemistry of Foods: Vitamins Review Questions

True or False: Vitamins H, M, S, W, and X were all eventually shown to be choline.

False.

The two classes of vitamins are _____ soluble or _____ soluble.

Fat; water.

If you wanted to increase the vitamin C content of your diet, which of the diet, which of the following foods would you choose in larger amounts?

Green peppers, tomatoes, and oranges.

Vitamins are considered _____ and are essential but only in _____ amounts.

Micronutrients; small.

Which of the following statements is true about the sources of vitamin K?

Most of our vitamin K for metabolic needs is produced by internal bacteria.

Vitamins are _____ molecules since they contain carbon (C).

Organic.

Most vitamins are consumed as _____, which must be chemically altered after consumption to become vitamins.

Provitamins.

True or False: Exposure to sunlight produces vitamin D from cholesterol in the skin.

True.

True or False: The fat-soluble vitamins include A, D, E, and K.

True.

True or False: The water-soluble vitamins include vitamin C and all the B vitamins.

True.

True or False: Vitamin D and sufficient calcium and phosphorus can prevent rickets.

True.

True or False: Vitamin K is found in meat, especially liver, and in leafy vegetables.

True.

True or False: Vitamins help with cell metabolism and are components of body-tissue construction.

True.

Matching: Which vitamin group can be found in sources of: Orange fruits and vegetables, dark leafy green vegetables, fortified milk?

Vitamin A.

Matching: Which vitamin group maintains good eyesight?

Vitamin A.

Matching: Which vitamin group can be found in sources of: Citrus fruits, kiwi, strawberries, red peppers, tomatoes, broccoli?

Vitamin C.

Matching: Which vitamin group involves wound healing and fights infection?

Vitamin C.

Matching: Which vitamin group aids in calcium absorption which helps maintain strong bones and teeth?

Vitamin D.

Matching: Which vitamin group can be found in sources of: Fortified milk, fish, egg yolks, fortified breakfast cereal?

Vitamin D.

Matching: Which vitamin group can be found in sources of: Whole grains, leafy green vegetables, vegetable oils, egg yolks, nuts and seeds?

Vitamin E.

Matching: Which vitamin group protects cells and body tissue from damage?

Vitamin E.

Matching: What helps to regulate chemical reactions in the body?

Vitamins.

True or False: A coenzyme acts alone to control a number of different types of reactions.

False.

True or False: Carotene is preformed vitamin A found in animal food sources.

False.

True or False: Extra vitamin C is stored in the liver to meet tissue-infection demands.

False.

Humans must consume at least _____ (how many) vitamins in their diet.

12.

Matching: Which vitamin group can be found in sources of: Breads and grains?

B Vitamins.

Matching: Which vitamin group releases energy from foods?

B Vitamins.

Vitamin A is fat soluble and produced by humans from carotene in plant foods or consumed as the fully formed vitamin in animal foods. Which of the following supplies the greatest amount of this vitamin?

Carrots.

Vitamins are relatively small molecules that most often acts as _____: organic molecules that bind to an enzyme in order for that enzyme to be active.

Coenzymes.