Nursing Elites

1. Which of the following enzymes is responsible for adding a nucleotide to a growing DNA chain?

• A. Helicase
• B. Ligase
• C. Nuclease
• D. Polymerase

Correct answer: D

Rationale: The correct answer is Polymerase. Polymerase is the enzyme responsible for adding nucleotides to a growing DNA chain during DNA replication. Helicase unwinds the DNA double helix to separate the DNA strands for replication, Ligase joins DNA fragments together by catalyzing the formation of phosphodiester bonds between them, and Nuclease cuts or degrades DNA strands. Therefore, choices A, B, and C are incorrect in the context of adding nucleotides to a growing DNA chain.

2. What is the initial step a writer takes when generating new ideas for a writing task?

• A. Brainstorm
• B. Final edit
• C. Draft
• D. Revision

Correct answer: A

Rationale: When a writer begins a new writing task, the first step is typically brainstorming. Brainstorming involves generating new ideas, concepts, and approaches before moving on to drafting. Option B, 'Final edit,' is incorrect as it refers to the last stage of the writing process, where the writer reviews and makes final adjustments to the completed draft. Option C, 'Draft,' is incorrect as it comes after brainstorming and involves putting the ideas into a structured form. Option D, 'Revision,' is also incorrect as it involves making changes and improvements to the draft after the initial writing phase.

3. What is the most effective way to rewrite the following sentence: She is saying that some of the students are wearing to school is being distracting and inappropriate?

• A. Some of the outfits students wear to school, she is saying, are distracting and not appropriate.
• B. The outfits are distracting and inappropriate, she says, that students wear to school.
• C. She says that some of the outfits that students wear to school are distracting and inappropriate.
• D. She says that it is distracting and inappropriate that students wear outfits to school.

Correct answer: C

Rationale: The most effective way to rewrite the sentence is, 'She says that some of the outfits that students wear to school are distracting and inappropriate.' This choice corrects the sentence structure by placing the subject ('Some of the outfits') before the verb ('are'), making it clearer and more grammatically correct. Choice A is incorrect as it places the subject after the verb, which disrupts the sentence structure. Choice B is incorrect as it changes the meaning of the sentence by placing the verb before the subject. Choice D is incorrect as it creates a confusing sentence structure by using 'that' redundantly.

4. Which hormone, produced by the pancreas, is involved in the regulation of blood sugar levels by inhibiting the release of insulin and promoting the release of glucose into the bloodstream?

• A. Insulin
• B. Glucagon
• C. Cortisol
• D. Somatostatin

Correct answer: D

Rationale: The correct answer is D, Somatostatin. Somatostatin is a hormone produced by the pancreas that plays a crucial role in regulating blood sugar levels by inhibiting the release of insulin and promoting the release of glucose into the bloodstream. It acts as a counterbalance to insulin, preventing excess insulin secretion and ensuring the availability of glucose when needed. Therefore, somatostatin helps maintain blood sugar balance in the body. Choices A, B, and C are incorrect. Insulin is responsible for lowering blood sugar levels, while glucagon and cortisol have roles that differ from the functions described in the question.

5. Which of the following quantities do catalysts alter to control the rate of a chemical reaction?

• A. Substrate energy
• B. Activation energy
• C. Inhibitor energy
• D. Promoter energy

Correct answer: B

Rationale: The correct answer is B: Activation energy. Catalysts function by reducing the activation energy needed for a chemical reaction to proceed. By lowering the activation energy, catalysts facilitate the reaction without being consumed themselves. Substrate energy, inhibitors, and promoters are not directly altered by catalysts in the same way activation energy is. Substrate energy refers to the energy of the reactants, which is not altered by catalysts. Inhibitors increase the activation energy required for a reaction, while promoters enhance the effectiveness of a catalyst but do not represent a quantity altered by catalysts.

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