Homework answers / question archive / Pennsylvania State University - NUTR 251 General 1)Complex organic molecules that associate closely with most enzymes but are not proteins are known as

Pennsylvania State University - NUTR 251 General 1)Complex organic molecules that associate closely with most enzymes but are not proteins are known as

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Pennsylvania State University - NUTR 251

General

1)Complex organic molecules that associate closely with most enzymes but are not proteins are known as...

A)           couplers.

B)            precursors. C) coenzymes.

D) antioxidants.

 

2. Another term for vitamin B6 is:

A)           pyridoxine

B)            cyanocobalamin

C)            pantothenic acid

D)           ascorbic acid General 2

3.            Which statement is FALSE about vitamins? If none are false, mark E.

A)           Vitamin B12 is found naturally only in animal foods.

B)            You would have to drink at least 3 cups of orange juice to get your RDA for ascorbic acid.

C)            Biotin can be synthesized by the bacteria in the GI tract.

D)           The UL for vitamin B6 is about 75 times the RDA.

E)            None of the above are FALSE. Sources

4.            Which of the following would provide the most riboflavin in the typical American diet?

A)           Spinach

B)            Tuna

C)            potato D) milk

E) Orange juice

 

5.            Since manufacturers started fortifying milled grain products with folate, the rate of scurvy have declined substantially.

A) True B) False

 

6.            Which of the following vitamins are found in foods across most food groups and thus deficiency is extremely rare?

A)           thiamin and vitamin C

B)            vitamin C and B12

C)            vitamin B6 and pantothenic acid

 

 

D)           niacin and folate

 

7.            Of the following foods, which would be the only source of vitamin B12?

A) Pecans B) Hot dog

C)            Cauliflower

D)           Whole-grain bread

E)            Spinach Functions

8.            Which is the best description of the function of folate?/ Which of the following is a feature of folate nutrition?

A)           The coenzyme form is FAD.

B)            Dairy foods are a poor source of folate except for goat's milk.

C)            Insufficient folate intake results in deficiency of homocysteine.

D)           Folate donates a methyl group to vitamin B12.

E)            Folate donates an hydroxyl group to vitamin B12.

 

9.            What is the function of intrinsic factor in vitamin B12 absorption?

A)           It catalyzes the release of the vitamin from its protein-bound form in food.

B)            It attaches to the vitamin, thereby allowing absorption from the small intestines.

C)            It acts as a storage protein for the vitamin within intestinal epithelial cells.

D)           It attaches to folate for transport in blood.

E)            There is not such thing as an intrinsic factor.

 

10.          Which of the following vitamins is involved substantially in energy metabolism, that is, ATP production?

A)           Ascorbic acid

B)            Cobalamin C) Riboflavin

D)           Pyridoxine

E)            Folate

 

11.          Scurvy results in pinpoint hemorrhaging in the skin and bleeding of the gums. This can be explained by the biological function of      to keep the mineral        in the correct form so that it acts as a cofactor for the enzyme necessary for      synthesis.

A)           pyridoxine; copper; tryptophan

 

 

B)            vitamin B6; iron; serotonin

C)            vitamin C; copper; collagen D) ascorbic acid; iron; collagen

E) ascobic acid; selenium; fibrin Function 2

12.          Which of the following is the coenzyme form of thiamin?

A)           Thiaminacide

B)            Thiamin pyrophosphate

C)            Thiamin adenine dinucleotide

D)           Thiamin flavin mononucleotide Deficiencies 1

13.          A general niacin deficiency is known to be manifested in abnormalities of all of the following organs/systems EXCEPT what?

A)           gastrointestinal tract

B)            nervous system C) skeletal

D) skin

 

14.          Which of the following diets is most likely to lead to beriberi, a deficiency seen in poor countries, but rarely in the U.S.?

A)           High intakes of white, refined rice

B)            High intake of corn based foods without lime treatment

C)            High intakes of unrefined rice

D)           Low intakes of food grown near the ocean Deficiencies 2

15.          You are a dietitian and see the report of the blood work from a woman in her twenties who is pregnant. Her red blood cells are larger than normal, so you suspect that her diet is low in

A)           ascorbic acid.

B)            pyridoxine.

C)            folate.

D)           thiamin.

E)            niacin.

 

16.          The appearance of the neurological symptoms of pernicious anemia may be delayed due to high intake of supplements of...

A) folate.

B)            niacin.

 

 

C)            vitamin C.

D)           vitamin B6.

 

Deficiency 3

 

17.          Which of the following is an early sign of vitamin C deficiency?

A) swollen feet

B) bleeding gums

C)            dermatitis

D)           hair loss

E)            diarrhea

 

 

Pharmacology/Toxicities

 

18.          Which of the following is a side effect of large amounts of vitamin C supplementation?

A)           giving false positive diabetes tests

B)            giving false negative diabetes test

C)            acting as a prooxidant in the body

D) all of the above

 

19.          The UL for vitamin C is   , whereas, the amount you might be eating everyday is                .

A)           500 mg/day; 20 mg/day

B)            5,000 mg/day; 500 mg/day

C)            200 g/day; 1 g/day

D)           2,000 mg/day; 100 mg/day

E)            5 g/day; 0.5 g/day General 3

20.          Fred just consumed a tuna sandwich and a glass of milk which contains 180 mg of tryptophan. Fred has the capacity to make              mg of    from this meal.

A) 30 mg; niacin B) 3 mg; niacin

C)            6 mg; niacin

D)           6 mg; thiamin

E)            60 mg; thiamin