Nursing Elites

1. Two objects with different masses collide. What happens to their momentum after the collision?

• A. Increases for both objects
• B. Decreases for both objects
• C. Remains the same for both objects
• D. Can increase for one and decrease for the other

Correct answer: C

Rationale: In an isolated system (no external forces), the total momentum

2. The speed of light in a vacuum is measured in units of:

• A. Meters per second
• B. Hertz
• C. Candela
• D. Newton

Correct answer: A

Rationale: The correct answer is A: 'Meters per second.' The speed of light in a vacuum is a fundamental constant of nature and is approximately 299,792,458 meters per second. This speed is constant and does not vary based on the frequency or wavelength of light. Hertz (B) is a unit of frequency, Candela (C) is a unit of luminous intensity, and Newton (D) is a unit of force. Understanding the units used to measure the speed of light is important in physics and related fields to accurately describe the propagation of light in different mediums.

3. Ectopic pregnancy is a serious condition that occurs when a fertilized egg implants outside the uterus. What is the most common location for an ectopic pregnancy?

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

Correct answer: B

Rationale: The correct answer is B: Fallopian tube. The fallopian tube is the most common location for an ectopic pregnancy to occur. This is because the fertilized egg typically gets stuck or implants in the fallopian tube instead of traveling to the uterus for normal implantation. If left untreated, an ectopic pregnancy in the fallopian tube can lead to serious complications such as tubal rupture and internal bleeding. The other options (ovary, cervix, vagina) are not typical sites for implantation of a fertilized egg and are less likely to result in an ectopic pregnancy.

4. Which of the following is a characteristic of unsaturated fatty acids?

• A. They are solid at room temperature.
• B. They contain only single bonds.
• C. They have a higher melting point.
• D. They contain double or triple bonds.

Correct answer: D

Rationale: Unsaturated fatty acids contain double or triple bonds in their hydrocarbon chains. The other choices do not accurately describe unsaturated fatty acids.

5. What is the process of copying DNA called?

• A. Transcription
• B. Translation
• C. Replication
• D. Mutation

Correct answer: C

Rationale: Rationale: A) Transcription is the process of creating an RNA copy of a segment of DNA. It involves the synthesis of mRNA from a DNA template. B) Translation is the process of synthesizing a protein from an mRNA template. It involves the conversion of the mRNA sequence into a sequence of amino acids. C) Replication is the process of copying DNA to produce an identical copy. During replication, the DNA double helix unwinds and each strand serves as a template for the synthesis of a new complementary strand, resulting in two identical DNA molecules. D) Mutation refers to a change in the DNA sequence that can result from errors during replication, exposure to mutagens, or other factors. While mutations can occur during replication, the process of copying DNA itself is called replication.

6. Which of the following is NOT a function of the integumentary system?

• A. Regulation of body temperature
• B. Protection from pathogens
• C. Synthesis of vitamin D
• D. Production of digestive enzymes

Correct answer: D

Rationale: The correct answer is D: "Production of digestive enzymes." The integumentary system primarily consists of the skin, hair, nails, and glands. Its main functions include regulating body temperature through processes like sweating and shivering, protecting the body from pathogens and external threats, and synthesizing vitamin D when exposed to sunlight. However, the production of digestive enzymes is not a function of the integumentary system. Digestive enzymes are primarily produced by organs such as the pancreas and salivary glands to aid in the breakdown of food in the digestive system, which is separate from the functions of the integumentary system.

Similar Questions