Nursing Elites

1. What is the functional group present in ethers?

• A. Hydroxyl
• B. Carbonyl
• C. Ether
• D. Amine

Correct answer: C

Rationale: Ethers have the functional group -O-, representing an oxygen atom bonded to two alkyl or aryl groups. The other choices are associated with different functional groups.

2. A group of antibiotics that target the cell wall of bacteria are classified as:

• A. Penicillins
• B. Tetracyclines
• C. Macrolides
• D. Fluoroquinolones

Correct answer: A

Rationale: Rationale: Penicillins are a group of antibiotics that target the cell wall of bacteria by inhibiting the synthesis of peptidoglycan, a key component of the bacterial cell wall. By interfering with cell wall synthesis, penicillins weaken the cell wall, leading to bacterial cell lysis and death. This mechanism of action makes penicillins effective against a wide range of bacteria, particularly Gram-positive bacteria. Tetracyclines (B), Macrolides (C), and Fluoroquinolones (D) have different mechanisms of action and do not specifically target the bacterial cell wall. Tetracyclines inhibit protein synthesis, Macrolides interfere with bacterial ribosomes, and Fluoroquinolones target bacterial DNA gyrase and topoisomerase IV.

3. Which of the following sentences uses figurative language?

• A. The scientist conducted an experiment.
• B. The child ran like a cheetah.
• C. The book contained many pages.
• D. The teacher explained the concept clearly.

Correct answer: B

Rationale: This sentence uses a simile, comparing the child's speed to a cheetah's.

4. A patient's weight is measured as 75 kilograms. What is their weight in pounds?

• A. 132 pounds
• B. 150 pounds
• C. 110 pounds
• D. 85 pounds

Correct answer: B

Rationale: Rationale: To convert kilograms to pounds, you can use the conversion factor 1 kilogram is approximately equal to 2.20462 pounds. Therefore, to convert 75 kilograms to pounds: 75 kilograms * 2.20462 pounds/kilogram ≈ 165.3475 pounds Rounded to the nearest whole number, the patient's weight of 75 kilograms is approximately 165 pounds. Among the given options, the closest weight in pounds to 165 is 150 pounds (option B).

5. What are the building blocks of proteins?

• A. Sugars
• B. Fatty acids
• C. Amino acids
• D. Nucleotides

Correct answer: C

Rationale: Rationale: Proteins are macromolecules made up of long chains of amino acids. Amino acids are the building blocks of proteins and are linked together through peptide bonds to form polypeptide chains, which then fold into specific three-dimensional structures to carry out various functions in the body. Sugars (A) are the building blocks of carbohydrates, fatty acids (B) are the building blocks of lipids, and nucleotides (D) are the building blocks of nucleic acids like DNA and RNA.

6. Antigenic variation, a common strategy used by some viruses, allows them to:

• A. Produce toxins
• B. Evade the immune system
• C. Survive outside a host
• D. Replicate rapidly

Correct answer: B

Rationale: Rationale: Antigenic variation is a strategy used by some viruses to evade the host's immune response. By constantly changing their surface antigens, viruses can avoid recognition and destruction by the immune system. This allows the virus to persist in the host and continue replicating, leading to prolonged infection and potential transmission to other hosts. Antigenic variation does not directly involve the production of toxins, survival outside a host, or rapid replication, making options A, C, and D incorrect in this context.

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