ATI RN
Basic Immune System Quizlet Questions
Question 1 of 5
Which enzyme catalyzes the following reaction? Gap 5' - G G-A-T-C-C—3' ⋮ ⋮ ⋮ ⋮ ⋮ 3' - C-C-T-A-G G—5' Gap 5' - G-G-A-T-C-C—3' ⋮ ⋮ ⋮ ⋮ ⋮ 3' - C-C-T-A-G-G—5'
Correct Answer: A
Rationale: The correct answer is A: DNA ligase. DNA ligase catalyzes the joining of two DNA strands by forming a phosphodiester bond between the 3' hydroxyl of one nucleotide and the 5' phosphate of another. In the given reaction, the enzyme is needed to seal the nick in the DNA strands after the Okazaki fragments have been synthesized during DNA replication. Explanation of other choices: B: DNA endonuclease - Endonucleases cleave the phosphodiester bond within a polynucleotide chain, not join two DNA strands. C: None of the options are correct - This is incorrect as DNA ligase is the correct enzyme for this reaction. D: DNA polymerase 1 - DNA polymerase synthesizes new DNA strands by adding nucleotides to the 3' end of the growing chain, not joining two DNA strands.
Question 2 of 5
When assessing a client with autoimmune disorder,what signs should the nurse look for in the client?
Correct Answer: B
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 3 of 5
In a client with AIDS,a CD4 cell count above ______ mm³ would indicate that antiretroviral therapy is being effective.
Correct Answer: C
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 4 of 5
You have suffered a needle stick injury after giving a patient an IM injection,but you have no information about the patient’s HIV status. What is the most appropriate method for obtaining this information about the patient?
Correct Answer: C
Rationale: The occupational health nurse is trained to handle situations involving potential exposure to bloodborne pathogens. They can appropriately discuss the need for HIV testing with the patient and ensure that the process is handled confidentially and professionally. The nurse manager and the injured nurse should not directly approach the patient about this sensitive issue.
Question 5 of 5
You assess a 24-year-old patient with RA who is considering using methotrexate (Rheumatrex) for treatment. Which information is most important to communicate with the physician?
Correct Answer: B
Rationale: Methotrexate is teratogenic and should not be used during pregnancy. If the patient is trying to get pregnant this is a critical consideration that must be discussed with the physician before starting the medication. The other information while important does not have the same immediate implications for treatment.