Domain 1

Question 1

What minerals are involved in carbohydrate metabolism?

a. cobalt, zinc
b. chromium, zinc
c. copper, chromium
d. iron, zinc

Answer 1

b. chromium, zinc

Question 2

An amino acid that cannot be produced by the body is:

a. alanine
b. glycine
c. tyrosine
d. tryptophan

Answer 2

d. tryptophan

Question 3

The following is an irreversible reaction:

a. pyruvic acid into lactic acid
b. pyruvic acid into acetyl CoA
c. glucose-6-phosphate into glycogen
d. glucose-6-phosphate into pyruvate

Answer 3

b. pyruvic acid into acetyl CoA

Question 4

Riboflavin, thiamin, and niacin are all involved in the:

a. metabolism of carbohydrate
b. metabolism of fat
c. metabolism of protein
d. production of amino acids

Answer 4

a. metabolism of carbohydrate

Question 5

An increased plasma pyruvate level is an indication of:

a. iron deficiency
b. riboflavin deficiency
c. excess carbohydrate ingestion
d. thiamin deficiency

Answer 5

d. thiamin deficiency

Question 6

In the fed state, the brain uses which nutrients as a source of energy?

Answer 6

glucose

Question 7

In starvation the brain uses which nutrients as a source of energy?

Answer 7

ketone bodies

Question 8

Gluconeogenesis is the:

Answer 8

creation of glucose from glycerol and amino acids

Question 9

Glycolysis is the:

Answer 9

catabolism of carbohydrate

Question 10

Glycogenolysis is the:

Answer 10

breakdown of glycogen releasing glucose

Question 11

The end product of aerobic glycolysis is:

Answer 11

pyruvic acid

Question 12

In humans, vitamin K is affected by:

a. anticoagulants and antibodies
b. iodine
c. water-soluble vitamins
d. gluten

Answer 12

a. anticoagulants and antibodies

Question 13

Which hormone regulates calcium levels?

a. insulin
b. thyroid
c. parathyroid
d. aldosterone

Answer 13

c. parathyroid

Question 14

Pyridoxine acts as a coenzyme in:

a. iron transfer
b. deamination and transamination
c. fat transfer through the lymphatic system
d. osmotic pressure of body fluids

Answer 14

b. deamination and transamination

Question 15

Which of the following are synthesized by intestinal bacteria?

a. biotin, panthothenic acid, vitamin K
b. vitamin E, vitamin K, biotin
c. pyridoxine, vitamin E
d. ascorbic acid, pyridoxine, vitamin K

Answer 15

a. biotin, panthothenic acid, vitamin K

Question 16

Biotin is considered a coenzyme in the synthesis of:

a. protein
b. carbohydrate
c. glycogen
d. fatty acids

Answer 16

d. fatty acids

Question 17

Which enzymes are involved in protein digestion?

a. ptyalin, lipase, sucrase
b. amylase, lipase, trypsin
c. pepsin, trypsin, chymotrypsin, carboxypeptidase
d. trypsin, lipase, amylase

Answer 17

c. pepsin, trypsin, chymotrypsin, carboxypeptidase

Question 18

Protein digestion begins in the:

a. mouth
b. stomach
c. small intestine
d. ileum

Answer 18

b. stomach

Question 19

Which conversion requires glucose-6-phosphatase?

a. glucose into liver glycogen
b. glucose into pyruvic acid
c. pyruvic acid into lactic acid
d. liver glycogen into glucose

Answer 19

d. liver glycogen into glucose

Question 20

NADPH is:

a. essential in the synthesis of fatty acids
b. essential in the synthesis of glycogen
c. involved in the catabolism of protein
d. essential in transamination

Answer 20

a. essential in the synthesis of fatty acids

Question 21

The following are required for the conversion of pyruvic acid into in active acetate?

a. thiamin, NAD, oxaloacetic acid, magnesium
b. oxygen, pantothenic acid, vitamin E
c. Thiamin, niacin, riboflavin pantothenic acid, magnesium
d. pantothenic acid oxaloacetate, citric acid

Answer 21

c. Thiamin, niacin, riboflavin pantothenic acid, magnesium

Question 22

Which vitamins acts as a coenzyme in transamination?

a. pyridoxine
b. thiamin
c. riboflavin
d. vitamin b12

Answer 22

a. pyridoxine

Question 23

Dietary fat enters the blood as ——- and leaves the liver as——-

a. phospholipids, chylomicrons
b. chylomicrons, phospholipids
c. chylomicrons, lipoproteins
d. lipoproteins, chylomicrons

Answer 23

c. chylomicrons, lipoproteins

Question 24

The oxidation of fatty acids forms:

a. acetyl CoA
b. pyretic acid
c. lactic acid
d. oxaloacetate

Answer 24

a. acetyl CoA

Question 25

Which of the following can be reversed with vitamin A?

a. xerophthalmia
b. nyctalopia
c. Wilsons disease
d. homocysteinuria

Answer 25

b. nyctalopia