Nursing Elites

1. How many different amino acids make up human proteins?

• A. 9
• B. 13
• C. 15
• D. 20

Correct answer: D

Rationale: The correct answer is D: 20. There are 20 different amino acids that combine to form proteins in the human body. Each amino acid has a unique side chain that determines its properties. Choices A, B, and C are incorrect as they do not represent the total number of different amino acids found in human proteins.

2. What is the process by which proteins are synthesized from the available amino acids?

• A. Gluconeogenesis.
• B. Deamination.
• C. Protein synthesis.
• D. Transamination.

Correct answer: C

Rationale: The correct answer is C: Protein synthesis. This process involves the formation of proteins from amino acids to support various body functions. Gluconeogenesis (choice A) is the synthesis of glucose from non-carbohydrate sources, not protein synthesis. Deamination (choice B) is the removal of an amino group from an amino acid, not the synthesis of proteins. Transamination (choice D) is the transfer of an amino group from one molecule to another, not the direct synthesis of proteins.

3. Amino acids that can be synthesized by the body in sufficient amounts are known as:

• A. indispensable.
• B. dispensable.
• C. simple.
• D. complex.

Correct answer: B

Rationale: The correct answer is B, 'dispensable.' Dispensable amino acids are those that the body can synthesize in sufficient amounts, so they are not required to be obtained from the diet. Indispensable amino acids, on the other hand, are essential and must be obtained from the diet because the body cannot produce them in sufficient quantities. Choices C and D, 'simple' and 'complex,' are incorrect as they do not accurately describe amino acids in terms of synthesis by the body.

4. Foodborne illness may be caused by contamination of food with:

• A. pesticides.
• B. genetically modified ingredients.
• C. microorganisms.
• D. food additives.

Correct answer: C

Rationale: The correct answer is C: microorganisms. Microorganisms, such as bacteria and viruses, are common causes of foodborne illnesses. These pathogens can contaminate food during various stages of production, processing, or preparation. Choice A, pesticides, are chemicals used to control pests and are not a common cause of foodborne illnesses. Genetically modified ingredients, choice B, refer to foods derived from genetically modified organisms (GMOs) and are not inherently linked to foodborne illnesses. Food additives, choice D, are substances added to food to preserve flavor or enhance taste and are not typically the primary cause of foodborne illnesses.

5. Which nutrient has a protein-sparing effect?

• A. Glycerol
• B. Carbohydrate
• C. Nitrogen
• D. Fatty acids

Correct answer: B

Rationale: Carbohydrates have a protein-sparing effect, meaning that adequate carbohydrate intake can prevent the use of protein for energy. Glycerol, nitrogen, and fatty acids do not have a protein-sparing effect. Glycerol is a component of fats and oils, nitrogen is a component of proteins, and fatty acids are used primarily as an energy source.

Similar Questions