ATI TEAS 7
Biology
1. What is the role of transfer RNA (tRNA) in protein synthesis?
- A. Transcribes DNA into mRNA
- B. Decodes the genetic code on mRNA
- C. Carries specific amino acids to the ribosomes bas(a) Carries amino acids to the ribosomes: This is the function of transfer RNA (tRNA), not ribosomal RNA. (b) Reads the genetic code on mRNA: This is the function of the ribosomes as a whole, not just the ribosomal RNA. (d) Controls the rate of protein synthesis: This is a more complex process involving various factors, not solely ribosomal RNA. ? ed on the mRNA
- D. Modifies the structure of proteins
Correct answer: C
Rationale: Rationale: A) Transcribes DNA into mRNA: This is the function of RNA polymerase, not transfer RNA (tRNA). tRNA is involved in protein synthesis, not transcription. B) Decodes the genetic code on mRNA: This is the function of tRNA during translation. tRNA molecules carry specific amino acids and recognize the codons on mRNA, ensuring the correct amino acid is added to the growing polypeptide chain. C) Carries specific amino acids to the ribosomes: This is the primary role of tRNA in protein synthesis. Each tRNA molecule is specific for a particular amino acid and carries it to the ribosome, where it is added to the growing protein chain. D) Modifies the structure of proteins: This is not a function of tRNA. Protein modification can occur after translation is complete and involves other cellular processes and molecules.
2. What property of a substance remains constant regardless of changes in its location in the universe?
- A. Mass
- B. Weight
- C. Density
- D. Volume
Correct answer: a
Rationale: Mass is an intrinsic property of matter and remains constant regardless of its location.
3. Which of the following statements is NOT true about performance appraisal?
- A. Informing the staff about the specific impressions of their work help improve their
- B. A verbal appraisal is an acceptable substitute for a written report
- C. Patients are the best source of information regarding personnel appraisal.
- D. The outcome of performance appraisal rests primarily with the staff.
Correct answer: A
Rationale: Option A is the correct answer because informing staff about specific impressions of their work can be subjective and may not always lead to improvement. Performance appraisal should be based on objective criteria and feedback. Verbal appraisals can lack documentation and clarity, making a written report a more reliable form of evaluation. Patients may provide valuable input on staff interactions, but they may not have the full context to assess job performance comprehensively. The outcome of performance appraisal should involve both the staff and the appraiser, as it is a collaborative process to identify strengths and areas for development.
4. What is the formula to calculate work?
- A. Work = Force × Distance
- B. Work = Mass × Velocity
- C. Work = Power × Time
- D. Work = Energy ÷ Time
Correct answer: a
Rationale: Work is calculated by multiplying force exerted on an object by the distance the object moves in the direction of the force.
5. Julius plans to revisit the organizational chart of the department. He plans to create a new
- A. Box
- B. Solid line
- C. Broken line
- D. Dotted line
Correct answer: B
Rationale: The correct answer is B: 'Solid line.' In organizational charts, solid lines typically represent formal reporting relationships, indicating direct authority and responsibility between positions. Creating a new solid line on the chart would signify a new formal reporting relationship within the department. This can be important for clarifying roles, communication channels, and decision-making processes. Boxes represent positions or roles in the organizational structure, while broken lines and dotted lines are typically used for informal relationships or advisory roles, rather than formal reporting relationships.
6. What property of a substance remains constant regardless of changes in gravity?
- A. Mass
- B. Weight
- C. Volume
- D. Density
Correct answer: A
Rationale: Mass is a measure of the amount of matter in an object and remains constant regardless of changes in gravity. Weight, on the other hand, is a measure of the gravitational force acting on an object and varies with changes in gravity. Volume is the amount of space occupied by an object and can change with changes in gravity. Density is the mass of a substance per unit volume and can also change with changes in gravity if the volume changes.
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