AND ANSWERS RATED A+
✔✔Amino acids are generally classified as either essential or nonessential. Determine
whether each label describes an essential or a nonessential amino acid. - ✔✔essential
amino acid-
nine of the twenty amino acids contained in the human body.
Must be supplied by food in the diet.
tryptophan is this type of amino acid
nonessential amino acid-
the body can make these amino acids
aspartic acid is this type of amino acid
✔✔A food scientist wants to develop a new formula for feeding healthy infants. The
formula contains amino acids as well as carbohydrates, essential lipids, vitamins,
minerals, and water. Which of the following amino acids should she include in the
formula? (Check all that apply.) - ✔✔phenylalanine
methionine
lysine
✔✔Some protein digestion occurs in the stomach. - ✔✔True
✔✔Match the vitamin or vitamin precursor to its major food source - ✔✔vitamin E=
sunflower seeds and vegetable oils
vitamin K= kale, spinach, beet greens, turnip greens
vitamin D= fortified milk
beta-carotene= cantaloupe
✔✔Gabe is interested in ways to maximize the vitamin content of his fresh fruits and
vegetables. All of the following are good practices to preserve such foods' vitamin
contents, except ______. - ✔✔storing fresh produce in a warm place or dark cupboard
✔✔Match the following terms with their definitions. - ✔✔1. toxic amino acid
2. iron-containing portion of hemoglobin
3. form of folate that's in dietary supplements
4. small molecule that contains a vitamin and enables certain enzymes to function
5. chemical name for vitamin C
✔✔Cancer is a single disease characterized by cells that can't divide so they die early. -
✔✔false
, ✔✔Wilson wants to reduce his risk of cancer. He doesn't smoke; his weight is healthy
for his height; and he eats a wide variety of fruits and vegetables. Which of the following
dietary changes should he make to reduce his risk of cancer? (Check all that apply.) -
✔✔When taken in the form of dietary supplements, vitamins may be less effective at
reducing cancer risk than when the vitamins are consumed as they naturally occur in
food.
✔✔In some cases, people need a vitamin supplement. Match the person's description
with the vitamin that would most likely need to be supplemented. - ✔✔vitamin D= an
adult woman who is told after a bone mineral density test that she has osteomalacia
vitamin A= a child in the developing world who is diagnosed with night blindness
vitamin K= a newborn baby who has difficulty with blood clotting
vitamin E= a premature infant who is exhibiting signs of hemolysis
vitamin B-12= an older adult whose stomach doesn't produce enough acid
✔✔To reduce the risk of delivering infants with spina bifida, women of childbearing age
should focus on obtaining adequate amounts of ______. - ✔✔folate
✔✔A free radical is a _______. - ✔✔chemically unstable substance that can remove
electrons from more stable compounds
✔✔Match the following terms with their definitions. - ✔✔1. condition associated with
folate deficiency during pregnancy
2. symptom of early vitamin A deficiency
3. the adult form of rickets characterized by soft bones
4. condition characterized by the presence of large, immature red blood cells in the
bloodstream
✔✔Certain vitamins or provitamins function as antioxidants by helping to protect cells
from being damaged by free radicals. Check all of the following substances that are
known have antioxidant activity. - ✔✔Beta-carotene
vitamin E
vitamin C
✔✔Match the substance to its function in the body. - ✔✔Vitamin D= absorption of
calcium and phosphorus, calcification of bone, maintenance of muscular function
vitamin A= normal vision and reproduction, cellular growth, immune system function
Vitamin E= antioxidant