Nursing Elites

1. What verb tense is used in the underlined words in the following sentence? 'The doctor prescribed medicine after my son had been sick for four days.'

• A. Past perfect
• B. Present perfect
• C. Past progressive
• D. Present progressive

Correct answer: A

Rationale: The correct answer is 'A: Past perfect.' In the sentence, 'had been sick' is in the past perfect tense. The past perfect tense is formed with 'had' + the past participle of the main verb. In this sentence, it indicates an action that was completed before another past action. Choices B, C, and D are incorrect because the sentence does not contain the present perfect, past progressive, or present progressive tenses as indicated by the underlined words. The present perfect tense would require 'has' or 'have' + past participle, the past progressive would involve 'was' or 'were' + present participle, and the present progressive would include 'am', 'is', or 'are' + present participle, none of which are present in the sentence.

2. What is the difference between polygenic inheritance and pleiotropy?

• A. Polygenic inheritance involves multiple genes influencing one trait, while pleiotropy involves one gene affecting multiple traits.
• B. Polygenic inheritance is found in simple Mendelian traits, while pleiotropy is found in complex traits.
• C. Polygenic inheritance is always quantitative, while pleiotropy can be qualitative or quantitative.
• D. Both involve multiple genes and multiple traits, but the specific mechanisms differ

Correct answer: A

Rationale: - Polygenic inheritance refers to the situation where a trait is influenced by multiple genes, each contributing a small effect to the phenotype. These traits often show continuous variation and are not easily categorized into discrete categories. - Pleiotropy, on the other hand, occurs when a single gene influences multiple, seemingly unrelated traits. This means that a mutation in one gene can lead to multiple phenotypic effects across different traits or characteristics. - Therefore, the key difference between polygenic inheritance and pleiotropy lies in the number of genes involved in influencing a trait (multiple genes in polygenic inheritance vs. one gene in pleiotropy) and the direction of influence (one trait affected by multiple genes in polygenic inheritance vs. multiple traits affected by one gene in pleiotropy).

3. How do hydrogen bonds in water affect its characteristics?

• A. Hydrogen bonds are not polar enough to attract non-polar molecules.
• B. Hydrogen bonds cause water to be less dense when it is a solid than when it is a liquid.
• C. Hydrogen bonds cause water to have high surface tension, allowing some organisms to move across it.
• D. Hydrogen bonds cause water to be a good solvent.

Correct answer: C

Rationale: Hydrogen bonds in water contribute to its high surface tension, enabling some organisms to move across the water's surface. This property is essential for certain insects and small animals that rely on surface tension to move or stay afloat on water. Choice A is incorrect because hydrogen bonds are polar and can attract polar and other charged molecules. Choice B is incorrect as hydrogen bonds make ice less dense than liquid water, which is a unique property. Choice D is incorrect as the ability of water to act as a good solvent is primarily due to its polarity, not just hydrogen bonding.

4. The syllable '-tion' is a(n) _______ and turns a _______ into a _______.

• A. Suffix; verb; noun
• B. Affix; noun; pronoun
• C. Prefix; noun; verb
• D. Infix; noun; adjective

Correct answer: A

Rationale: The syllable '-tion' is a suffix that is commonly added to verbs to turn them into nouns. For example, the word 'action' is formed by adding '-tion' to the verb 'act.' This transformation changes the verb into a noun representing the act itself. Therefore, option A correctly identifies '-tion' as a suffix that turns a verb into a noun. Choices B, C, and D are incorrect because they misidentify '-tion' as a different type of affix (prefix, infix) and incorrectly associate it with nouns, pronouns, verbs, or adjectives instead of its actual function of transforming verbs into nouns.

5. What is 0.05 mcg in mg?

• A. 0.00005 mg
• B. 0.0005 mg
• C. 0.005 mg
• D. 0.05 mg

Correct answer: A

Rationale: To convert micrograms (mcg) to milligrams (mg), you need to divide by 1000. Therefore, 0.05 mcg equals 0.00005 mg. This conversion is crucial in the medical field to ensure accurate dosing. Choice B, 0.0005 mg, is incorrect as it represents 0.5 mcg. Choice C, 0.005 mg, is the equivalent of 5 mcg. Choice D, 0.05 mg, actually represents 50 mcg. It's important to pay attention to decimal placement and unit conversions to avoid medication errors.

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