ATI TEAS 7
TEAS 7 practice test free science
1. What are some potential applications of understanding atomic structure in modern technology?
- A. Designing new materials with tailored properties.
- B. Developing advanced electronics and nanotechnology.
- C. Improving nuclear energy production and safety.
- D. All of the above.
Correct answer: D
Rationale: Understanding atomic structure is essential for various technological advancements. Designing new materials with tailored properties necessitates knowledge of atomic structure to effectively manipulate their characteristics. Developing advanced electronics and nanotechnology involves working at the atomic level to create smaller, faster, and more efficient devices. Improving nuclear energy production and safety also heavily depends on understanding atomic structure to enhance reactor design and safety measures. Therefore, all the options provided (A, B, and C) are potential applications of understanding atomic structure in modern technology.
2. Which of the following does not describe a general trait of macromolecules?
- A. They can exist as single chains.
- B. They can be branched.
- C. They all contain carbon, hydrogen, and phosphorus.
- D. They are all used by the body.
Correct answer: C
Rationale: The correct answer is C. While many macromolecules contain carbon, hydrogen, and phosphorus, not all of them do. For example, lipids, a type of macromolecule, may not contain phosphorus. Choice A and B describe structural features that macromolecules can exhibit, whether as single chains or branched forms. Choice D is incorrect as not all macromolecules are used by the body, such as synthetic polymers or certain non-digestible fibers.
3. How many molecules of NADPH and ATP are required to reduce 6 molecules of CO2 to glucose via photosynthesis?
- A. 6 NADPH and 9 ATP
- B. 12 NADPH and 18 ATP
- C. 18 NADPH and 24 ATP
- D. 24 NADPH and 36 ATP
Correct answer: B
Rationale: During photosynthesis, 12 molecules of NADPH and 18 molecules of ATP are required to reduce 6 molecules of CO2 to glucose. NADPH and ATP are essential energy carriers in the process of photosynthesis. Choice A is incorrect because it underestimates the required molecules of both NADPH and ATP. Choices C and D overestimate the number of molecules needed, making them incorrect answers.
4. Which blood vessels carry deoxygenated blood from the body back to the right atrium of the heart?
- A. Arteries
- B. Veins
- C. Capillaries
- D. Venules
Correct answer: B
Rationale: Veins are the blood vessels that carry deoxygenated blood from the body back to the heart. Arteries transport oxygenated blood away from the heart. Capillaries are the smallest blood vessels where gas exchange occurs between blood and tissues. Venules are small veins that connect capillaries to larger veins, but they do not directly carry deoxygenated blood back to the heart.
5. When light interacts with a perfectly smooth surface, like a mirror, the dominant interaction is:
- A. Refraction
- B. Diffraction
- C. Total internal reflection
- D. Specular reflection
Correct answer: D
Rationale: When light interacts with a perfectly smooth surface like a mirror, the dominant interaction is specular reflection. Specular reflection occurs when light rays are reflected off a smooth surface at the same angle as the incident angle, resulting in a clear and sharp reflection. Refraction, which involves the bending of light as it passes from one medium to another, is not the dominant interaction with a perfectly smooth surface. Diffraction, the bending of light waves around obstacles, is not the dominant interaction with smooth surfaces. Total internal reflection occurs when light is reflected back into a medium due to encountering a boundary at an angle greater than the critical angle, but it is not the dominant interaction on a perfectly smooth surface like a mirror.
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