Nursing Elites

1. Which of the following is true of the Krebs cycle?

• A. It is a redox reaction involving proteins produced during glycolysis
• B. It is a redox reaction involving sugars produced during glycolysis
• C. Protons are passed along a gradient to produce ATP
• D. It is also known as the glycolic acid cycle

Correct answer: B

Rationale: The Krebs cycle, also known as the citric acid cycle, involves a series of redox reactions that occur in the mitochondria. The cycle begins with the oxidation of acetyl CoA, which is derived from the breakdown of sugars produced during glycolysis. These sugars are broken down further in the Krebs cycle to produce ATP and reduce electron carriers such as NADH and FADH2. The cycle does not involve proteins produced during glycolysis. Protons are not passed along a gradient to produce ATP directly in the Krebs cycle; rather, they are used in the electron transport chain to generate ATP. The Krebs cycle is not known as the glycolic acid cycle; glycolysis is the metabolic pathway that produces pyruvate from glucose.

2. What punctuation is needed in this sentence to make it correct? I finished the project early; however, I really should edit my work.

• A. Apostrophe
• B. Colon
• C. Comma
• D. Semicolon

Correct answer: D

Rationale: In the given sentence, a semicolon is needed after 'early' to join the two independent clauses 'I finished the project early' and 'however, I really should edit my work.' This punctuation mark helps to connect the related ideas in the sentence while maintaining the separation between the clauses. The other choices are incorrect because an apostrophe is used to show possession or to indicate missing letters; a colon is used to introduce a list, explanation, or quotation; and a comma alone would not provide the necessary separation between the two independent clauses in this context.

3. What is your “funny bone” actually?

• A. Humerus
• B. Ulnar nerve
• C. Carpal bone
• D. Biceps brachii

Correct answer: B

Rationale: Your 'funny bone' is actually your ulnar nerve, not a bone. The ulnar nerve runs along the inside part of your elbow and is easily bumped or compressed, leading to a tingling or slightly painful sensation that is commonly referred to as hitting your funny bone. The humerus (Choice A) is the long bone in your upper arm, the carpal bone (Choice C) is a bone in your wrist, and the biceps brachii (Choice D) is a muscle in your upper arm. Therefore, the correct answer is the ulnar nerve (Choice B).

4. Where is Thailand located?

• A. Africa
• B. Europe
• C. South America
• D. Asia

Correct answer: D

Rationale: Thailand is located in Asia, not South America. Thailand is a country in Southeast Asia known for its beautiful beaches, rich culture, and delicious cuisine. It shares borders with Myanmar, Laos, Cambodia, and Malaysia. The extract provided also mentions the country of Siam, which is now known as Thailand, indicating its location in Asia. Choices A, B, and C are incorrect as Thailand is not located in Africa, Europe, or South America.

5. What color does phenolphthalein turn in the presence of an acid?

• A. Clear
• B. Blue
• C. Pink
• D. Red

Correct answer: C

Rationale: In the presence of an acid, phenolphthalein turns pink. Phenolphthalein is a pH indicator that is colorless in acidic solutions but turns pink in basic solutions. Therefore, when added to an acidic solution, phenolphthalein will exhibit a pink coloration. Choice A, 'Clear,' is incorrect because phenolphthalein does not remain colorless in the presence of an acid. Choice B, 'Blue,' is incorrect as phenolphthalein does not turn blue in the presence of an acid. Choice D, 'Red,' is incorrect as phenolphthalein does not exhibit a red color in acidic solutions.

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