Two amino acids are chemically joined by a:
a. double bond.
b. hydrogen bond.
c. carboxyl bond.
d. peptide bond.
ANS: D
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Of these foods, which make the greatest contributions of iron to the diet?
a. Protein foods and some green vegetables b. Milk and milk products c. Whole-grain breads and cereals d. Fortified cereals e. Beef liver
Elevated LDL concentrations are associated with a high risk of heart disease because they:
a. transport cholesterol and triglycerides from the liver to the tissues. b. carry excessive amounts of fat that is deposited around the heart. c. encourage high levels of iron in the blood. d. take excess cholesterol back to the liver, which increases the production of cholesterol.
How many trimesters is a pregnancy cycle divided into?
a. one b. two c. three d. four e. five
The risk of hypertension is increased by all of the following except
A. high protein intake. B. obesity. C. sedentary lifestyle. D. high sodium intake.