Nokea
A heart attack is
- A. damage to cardiac muscle
- B. Typically from a blocked coronary artery
- C. Death of brain tissue from blocked arteries in the head
- D. A & b
Correct Answer: D
Rationale: The correct answer is D because a heart attack, also known as a myocardial infarction, involves damage to the cardiac muscle due to a blocked coronary artery. Choice A is correct as it directly relates to the definition of a heart attack. Choice B is also correct as a blocked coronary artery is the main cause of decreased blood flow to the heart muscle leading to a heart attack. Choice C is incorrect as it refers to a stroke, which is the death of brain tissue due to blocked arteries in the head, not a heart attack. Therefore, A & B (choices A and B) are the correct options, making D the correct answer.
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What are the essential nursing actions that should be taken for a client with an immune system disorder?
- A. Monitor client for depression.
- B. Monitor client for infusion reactions.
- C. Review drug references.
- D. Advise the client on modifying the home environment.
Correct Answer: B
Rationale: Monitoring for infusion reactions is critical as clients with immune disorders often receive biologic therapies that can cause severe allergic or infusion-related reactions.
Which of the following enzymes removes 5' phosphate groups thereby preventing or decreasing the self-sealing of restricted plasmid vector molecules?
- A. Calf intestinal phosphatase
- B. Pyrophosphatase
- C. Phosphohydrolase
- D. phosphate exonuclease
Correct Answer: A
Rationale: The correct answer is A: Calf intestinal phosphatase. This enzyme removes 5' phosphate groups from DNA molecules, preventing self-ligation of restricted plasmid vectors. This step is crucial in generating linearized vectors for downstream applications. Pyrophosphatase (B) hydrolyzes pyrophosphate bonds, not 5' phosphate groups. Phosphohydrolase (C) is a general term for enzymes that hydrolyze phosphoester bonds, not specific to 5' phosphate removal. Phosphate exonuclease (D) degrades nucleic acids by removing nucleotides from the 3' end, not the 5' phosphate group.
You are completing an assessment and health history for an HIV-positive patient who is considering starting antiretroviral therapy with several medications. Which patient information concerns you the most?
- A. Patient has been HIV positive for 8 years and has never been on any drug therapy for the HIV infection.
- B. Patient tells you that he never has been very consistent about taking medications in the past.
- C. Patient continues to be sexually active with multiple partners and says that he is careful to use condoms.
- D. Patient has many questions and concerns regarding how effective and safe the medications are.
Correct Answer: B
Rationale: Adherence to antiretroviral therapy is critical for its success. If the patient has a history of inconsistent medication use this raises concerns about the effectiveness of the therapy and the risk of developing drug resistance. The other information while important does not directly impact the success of the treatment as much as adherence does.
Which enzyme excises incorrect nucleotides on the newly synthesized DNA?
- A. DNA gyrase
- B. RNA primase
- C. DNA ligase
- D. DNA polymerase II
Correct Answer: E
Rationale: I'm sorry, but it seems like there was a mistake in the question as there is no option E provided. However, the correct enzyme that excises incorrect nucleotides on the newly synthesized DNA is DNA polymerase III. DNA polymerase III has a 3' to 5' exonuclease activity that allows it to proofread and remove incorrect nucleotides during DNA replication. DNA gyrase is involved in DNA supercoiling, RNA primase synthesizes RNA primers, and DNA ligase seals nicks in the DNA backbone. DNA polymerase II is involved in DNA repair.
Priority Decision: During care of patients, what is the most important precaution for preventing transmission of infections?
- A. Wearing face and eye protection during routine daily care of the patient
- B. Wearing nonsterile gloves when in contact with body fluids, excretions, and contaminated items
- C. Wearing a gown to protect the skin and clothing during patient care activities likely to soil clothing
- D. Hand washing after touching fluids and secretions and removing gloves, as well as between patient contacts
Correct Answer: D
Rationale: Hand hygiene remains the single most effective measure in preventing the spread of infections, even when personal protective equipment (PPE) is used.