Nursing Elites

1. What is the structure that connects the ovary to the uterus in the female reproductive system?

• A. Urethra
• B. Fallopian tube
• C. Vagina
• D. Cervix

Correct answer: B

Rationale: The fallopian tubes are the structures that connect the ovaries to the uterus in the female reproductive system. These tubes serve as a pathway for the egg to travel from the ovary to the uterus, where fertilization typically occurs. Options (A) Urethra, (C) Vagina, and (D) Cervix are not the structures responsible for connecting the ovary to the uterus, making them incorrect choices for this question.

2. Which blood vessel carries oxygenated blood back to the heart?

• A. Pulmonary vein
• B. Pulmonary artery
• C. Aorta
• D. Superior vena cava

Correct answer: A

Rationale: The corrected question is asking for a blood vessel that carries oxygenated blood back to the heart. The pulmonary vein is the correct choice as it carries oxygenated blood from the lungs back to the heart during systemic circulation. The pulmonary artery carries deoxygenated blood from the heart to the lungs for oxygenation. The aorta is the main artery that carries oxygenated blood away from the heart to the body. The superior vena cava returns deoxygenated blood from the upper body back to the heart.

3. Which 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: During the S phase of interphase, DNA replication takes place. DNA polymerase is the enzyme responsible for synthesizing new DNA strands by adding nucleotides in a complementary manner to the template strand. It plays a pivotal role in accurately replicating the entire genome. While helicase unwinds the double-stranded DNA for replication, topoisomerase relieves the tension in the DNA strands, and ligase joins the Okazaki fragments on the lagging strand. However, DNA polymerase directly participates in the synthesis of new DNA strands during replication, making it the correct answer.

4. Which part of the brain controls breathing and heart rate?

• A. Cerebrum
• B. Medulla oblongata
• C. Thalamus
• D. Cerebellum

Correct answer: B

Rationale: The medulla oblongata is the correct answer because it is responsible for controlling involuntary functions such as breathing and heart rate. The cerebrum (Choice A) is primarily associated with higher brain functions like thinking and voluntary movements, not with regulating basic bodily functions like breathing and heart rate. The thalamus (Choice C) serves as a relay station for sensory information but is not directly involved in controlling breathing and heart rate. The cerebellum (Choice D) plays a role in coordination and balance, not in regulating respiratory and cardiac functions.

5. Which of the following is a unit of measurement for energy?

• A. Watt (W)
• B. Joule (J)
• C. Newton (N)
• D. Kilogram (kg)

Correct answer: B

Rationale: The unit of measurement for energy is the Joule (J). Energy is defined as the capacity to do work or produce heat, and the Joule is the standard unit used to measure energy in the International System of Units (SI). A Watt (A) is a unit of power, measured in joules per second, Newton (C) is a unit of force, and Kilogram (D) is a unit of mass. The Joule (J) is the appropriate unit for quantifying energy, making it the correct answer in this context.

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