Which of the following is true of amino acids?
Building blocks of lipids
Classified as monosaccharide, disaccharides, and polysaccharides
Classified as essential and nonessential
Building blocks of carbohydrates
The Correct Answer is C
A. Building blocks of lipids: Amino acids are the building blocks of proteins, not lipids. Lipids are composed of fatty acids and glycerol.
B. Classified as monosaccharide, disaccharides, and polysaccharides: These classifications refer to carbohydrates, not amino acids.
C. Classified as essential and nonessential: Amino acids are classified as essential (must be obtained from diet) and nonessential (can be synthesized by the body).
D. Building blocks of carbohydrates: The building blocks of carbohydrates are simple sugars (monosaccharides), not amino acids.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D","E"]
Explanation
A. Can be stored for later use as glycogen: Glucose is stored in the liver and muscles as glycogen for energy use when needed.
B. Converts to urea: Urea is a waste product formed from protein metabolism, not glucose metabolism.
C. Converts to ammonia: Ammonia is a byproduct of amino acid breakdown, not glucose metabolism.
D. Is burned as fuel to get energy: Glucose is the body's primary energy source, metabolized via glycolysis, the Krebs cycle, and oxidative phosphorylation.
E. Is the most important sugar in the body: Glucose is the key monosaccharide required for cellular metabolism and ATP production.
Correct Answer is ["B","D","E"]
Explanation
A. For fluid balance: Lipids do not play a direct role in maintaining fluid balance; electrolytes and plasma proteins like albumin regulate this function.
B. As a component of the myelin sheath: Lipids, particularly phospholipids and cholesterol, are essential for forming the myelin sheath, which insulates nerve fibers and facilitates efficient nerve conduction.
C. Component of hemoglobin: Hemoglobin is composed of iron and protein (globin chains), not lipids.
D. As a component of the cell membrane: Cell membranes are composed of a lipid bilayer (phospholipids and cholesterol), which helps maintain structural integrity and fluidity.
E. As an energy source: Lipids provide a concentrated energy source, yielding 9 kcal per gram, which is more than carbohydrates (4 kcal/g).
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