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Nursing Elites

ATI TEAS 7

Chemistry

1. What is the term for the chemical reaction that involves the loss of electrons?

Correct answer: b

Rationale: Oxidation is the chemical reaction that involves the loss of electrons. The other choices describe different types of reactions.

2. What is the main idea of the passage?

Correct answer: C

Rationale: B mentions Petra's architecture, but not its connection to trade. A and D are factually incorrect and not supported by the passage. Choice C accurately identifies Petra's rise and fall as tied to its position on the Silk Road, making it the main idea.

3. Which statement best summarizes the main argument of the passage?

Correct answer: C

Rationale: The passage acknowledges both the potential and concerns surrounding smart cities, making it the most accurate summary.

4. What is the term for the process of breaking a large molecule into smaller fragments by applying heat?

Correct answer: D

Rationale: Pyrolysis is the process of breaking down large molecules into smaller fragments by applying heat. The other choices involve different chemical processes.

5. Tight junctions are specialized regions between animal cells that perform which function?

Correct answer: D

Rationale: The correct answer is D, 'All of the above.' Tight junctions are specialized structures between animal cells that serve multiple functions. They facilitate communication between cells by allowing signaling molecules to pass through. Additionally, tight junctions provide anchorage between cells, helping to maintain tissue structure and integrity. Moreover, tight junctions regulate the selective passage of materials across cell layers, acting as a barrier to prevent the free diffusion of substances. Therefore, all the functions mentioned in the options are performed by tight junctions, making 'All of the above' the correct choice.

6. The number of protons in the nucleus of an atom determines its:

Correct answer: B

Rationale: The atomic number (Z) equals the number of protons in the nucleus and uniquely identifies an element. Mass number (A) includes both protons and neutrons, isotopes have different neutron numbers, and valence electrons are involved in bonding, not atomic identity.

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