ATI TEAS 7
Biology
1. What is the role of RNA in protein synthesis?
- A. Stores genetic information
- B. Decodes genetic information
- C. Provides energy for the process
- D. Transports amino acids to the ribosomes
Correct answer: B
Rationale: Rationale: RNA plays a crucial role in protein synthesis by decoding the genetic information stored in DNA and carrying it to the ribosomes where proteins are synthesized. This process involves transcription, where RNA is synthesized from DNA, and translation, where the information in RNA is used to assemble amino acids into proteins. RNA acts as a messenger between DNA and the ribosomes, ensuring that the correct sequence of amino acids is used to build proteins according to the genetic code. Therefore, option B is the most appropriate choice as it accurately describes the role of RNA in protein synthesis.
2. The three main types of muscle tissue in the human body are:
- A. Smooth, cardiac, and voluntary skeletal
- B. Smooth, skeletal, and involuntary cardiac
- C. Voluntary smooth, cardiac, and skeletal
- D. Striated, non-striated, and epithelial
Correct answer: A
Rationale: The correct answer is A: Smooth, cardiac, and voluntary skeletal. Smooth muscle is found in the walls of internal organs and blood vessels, cardiac muscle makes up the heart, and voluntary skeletal muscle is attached to the bones and responsible for movement. Choice B is incorrect because cardiac muscle is involuntary, not voluntary. Choice C is incorrect because smooth muscle and cardiac muscle are involuntary, not voluntary. Choice D is incorrect because 'striated' and 'non-striated' refer to the appearance of muscle fibers, not the main types of muscle tissue in the body.
3. Which technique best helps maintain consistency in writing style?
- A. Writing freely without a clear outline or structure.
- B. Using different vocabulary and sentence structures in each paragraph.
- C. Establishing a style guide with agreed-upon terminology and formatting.
- D. Relying on thesaurus suggestions for varied word choices.
Correct answer: C
Rationale: A style guide ensures consistency in tone, terminology, and formatting across different pieces of writing.
4. Which additional information would be MOST helpful in further understanding the issue of microplastics?
- A. The economic costs associated with plastic pollution cleanup.
- B. The specific types of microbes used in bioremediation processes.
- C. The historical timeline of plastic production and its global distribution.
- D. The aesthetic impact of plastic pollution on beaches and tourism.
Correct answer: B
Rationale: Understanding the specific microbes used in bioremediation would directly contribute to knowledge about the solution proposed in the passage.
5. A guitar string vibrates at a fundamental frequency of 440 Hz. What is the frequency of the second harmonic (first overtone)?
- A. 220 Hz
- B. 440 Hz
- C. 880 Hz
- D. 1760 Hz
Correct answer: C
Rationale: Harmonics have frequencies that are multiples of the fundamental frequency. The second harmonic has a frequency twice the fundamental, so it's 440 Hz * 2 = 880 Hz.
6. Describe the ethical considerations surrounding the potential use of CRISPR-Cas9 technology in humans.
- A. Concerns about unintended consequences on the genome and potential off-target effects.
- B. Debates on modifying the human germline and potential eugenic implications.
- C. Accessibility and affordability of the technology, ensuring equitable access to benefits.
- D. Risks associated with CRISPR-Cas9 editing germline cells and potential long-term impacts.
Correct answer: B
Rationale: CRISPR-Cas9's ability to precisely edit germline cells raises ethical dilemmas about modifying the human gene pool. This includes concerns about eugenics, unintended consequences, and the long-term impact on future generations.
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