Nursing Elites

1. Within a nuclear reactor, control rods serve the primary purpose of:

• A. Reflecting neutrons back into the core
• B. Absorbing excess neutrons to control criticality
• C. Moderating the velocity of neutrons
• D. All of the above

Correct answer: C

Rationale: Control rods within a nuclear reactor serve the primary purpose of absorbing excess neutrons to control criticality. By adjusting the position of the control rods, the reactor operators can regulate the rate of fission reactions and prevent the reactor from overheating or reaching a state of uncontrolled chain reaction. Reflecting neutrons back into the core and moderating the velocity of neutrons are not the primary functions of control rods. Reflectors are used to bounce neutrons back into the core, while moderators slow down fast neutrons to increase the likelihood of fission. Therefore, the correct answer is B: 'Absorbing excess neutrons to control criticality.'

2. What enzyme plays a crucial role in DNA replication during the S phase of interphase?

• A. Helicase
• B. DNA polymerase
• C. Ligase
• D. Topoisomerase

Correct answer: B

Rationale: Rationale: During the S phase of interphase, DNA replication occurs. DNA polymerase is the enzyme responsible for synthesizing new DNA strands by adding nucleotides in a complementary fashion to the template strand. It plays a crucial role in replicating the entire genome accurately. Helicase unwinds the double-stranded DNA, topoisomerase relieves the tension in the DNA strands, and ligase joins the Okazaki fragments on the lagging strand. However, DNA polymerase is the enzyme directly involved in the synthesis of new DNA strands during replication.

3. Which of the following is an example of an unsaturated fatty acid?

• A. Stearic acid
• B. Palmitic acid
• C. Oleic acid
• D. Butyric acid

Correct answer: C

Rationale: Oleic acid is an unsaturated fatty acid, containing at least one double bond in its hydrocarbon chain. The other choices are saturated fatty acids.

4. Acne vulgaris, commonly known as acne, is primarily caused by

• A. Dry skin (Dry skin can worsen acne but isn't the primary cause)
• B. Clogged pores and excess oil production
• C. Bacterial infection alone (Bacteria play a role but not the sole cause)
• D. Vitamin deficiency

Correct answer: B

Rationale: The correct answer is B: 'Clogged pores and excess oil production.' Acne vulgaris, or acne, is primarily caused by a combination of factors including excess sebum (oil) production by the skin's sebaceous glands and the accumulation of dead skin cells, leading to clogged pores. This environment provides a breeding ground for acne-causing bacteria, contributing to inflammation and the formation of pimples. While factors like dry skin, bacterial infections, and even vitamin deficiencies can exacerbate acne, they are not the primary cause. Thus, B is the most accurate option for the primary cause of acne.

5. She finds out that some managers have benevolent-authoritative style of management. Which

• A. Have condescending trust and confidence in their subordinates
• B. Gives economic or ego awards
• C. Communicates downward to the staff
• D. Allows decision making among subordinates

Correct answer: D

Rationale: The correct answer is D because the benevolent-authoritative style of management involves allowing decision-making among subordinates. This style combines a caring attitude towards employees with a level of authority and control. Managers who adopt this style often empower their subordinates to make decisions within a set framework, fostering a sense of autonomy and responsibility among the team. Options A, B, and C do not accurately describe the characteristics of a benevolent-authoritative management style, making them incorrect choices for this question.

6. What is the term for the pressure exerted by blood against the walls of blood vessels?

• A. Heart rate
• B. Blood pressure
• C. Cardiac output
• D. Stroke volume

Correct answer: B

Rationale: The correct answer is B: Blood pressure. Blood pressure is the term used to describe the force or pressure exerted by blood against the walls of blood vessels. It is typically measured in millimeters of mercury (mmHg) and consists of two main components - systolic pressure (the pressure when the heart is contracting) and diastolic pressure (the pressure when the heart is relaxed). Heart rate (A) refers to the number of times the heart beats per minute and is not specifically related to the pressure against blood vessel walls. Cardiac output (C) is the volume of blood pumped by the heart per minute, while stroke volume (D) is the volume of blood pumped by the heart in a single contraction. These are related to heart function but not specifically to the pressure against blood vessel walls.

Similar Questions