after mitosis the genetic code is identical in new cells unless occur through radiation or other environmental influences after mitosis the genetic code is identical in new cells unless occur through radiation or other environmental influences
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1. After mitosis, the genetic code is identical in new cells unless _________ occur through radiation or other environmental influences.

Correct answer: D

Rationale: After mitosis, the genetic code is typically preserved and remains identical in the new cells. However, mutations can occur due to radiation or environmental influences, leading to changes in the DNA sequence and potentially altering the genetic code. Therefore, the correct answer is 'mutations.' Choices A, B, and C are incorrect because reductions, expulsions, and conceptions do not accurately describe the changes in the genetic code that can result from external factors. Mutations are the only option that reflects the alteration in the genetic code caused by external influences, making it the correct choice in this context.

2. After surgery to correct hypertrophic pyloric stenosis (HPS) in a 3-week-old infant who had been formula-fed, which postoperative feeding order is appropriate?

Correct answer: C

Rationale: After surgery for hypertrophic pyloric stenosis (HPS), it is appropriate to resume regular formula feeding within 24 hours postoperatively to promote recovery. Choice A, thickened formula after surgery, may be too heavy for the infant's digestive system at this early stage. Withholding feedings for the first 24 hours (Choice B) is not recommended as early feeding helps with recovery. Additional glucose feedings (Choice D) are not necessary and may not provide the balanced nutrition required after surgery.

3. A female client with major depression is prescribed fluoxetine (Prozac). She reports experiencing increased energy but still feels sad and hopeless. What is the nurse's best response?

Correct answer: B

Rationale: The correct answer is B. Increased energy without improvement in mood can increase the risk of self-harm in clients with depression. It is crucial for the nurse to recognize this potential risk and closely monitor the client for any signs of self-harm. Choice A is incorrect because dismissing the client's persistent feelings of sadness and hopelessness as normal may invalidate her experiences. Choice C is incorrect as fluoxetine (Prozac) typically starts showing effectiveness within a few weeks, so further delay is concerning. Choice D is incorrect because while discussing the client's feelings is important, the immediate focus should be on addressing the potential risk of self-harm associated with increased energy.

4. A client is expressing anger about his diagnosis of colorectal cancer. Which of the following actions should the nurse take?

Correct answer: A

Rationale: When a client is expressing anger about a diagnosis, it is essential for the nurse to validate the client's feelings. Choice A is correct because reassuring the client that anger is an expected response to grief acknowledges the client's emotions and encourages expression, fostering a therapeutic relationship. This validation helps the client feel understood and supported during a challenging time. Choice B is incorrect as ignoring the client's anger can lead to feelings of neglect and hinder effective communication, which is crucial for providing holistic care. Choice C is inappropriate because telling the client that anger is not helpful dismisses the client's emotions and can further escalate the situation, potentially damaging the nurse-client relationship. Choice D is not the best option as it does not involve acknowledging the client's feelings or providing support and validation, which are vital in promoting emotional well-being and trust between the client and the nurse.

5. A client with HIV/AIDS is receiving zidovudine (Retrovir). The nurse should monitor the client for which of the following adverse effects?

Correct answer: B

Rationale: The correct answer is B: Anemia. Zidovudine (Retrovir) can cause bone marrow suppression, leading to anemia. Monitoring for signs of anemia, such as fatigue, pallor, and shortness of breath, is crucial. Choice A, Hyperglycemia, is not a common adverse effect of zidovudine. Choice C, Hypertension, is not directly associated with zidovudine use. Choice D, Hypercalcemia, is also not a typical adverse effect of zidovudine.

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