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Nursing Elites

ATI TEAS 7

Biology

1. The gradual loss of topsoil due to wind or water erosion is called:

Correct answer: A

Rationale: Rationale: A) Desertification refers to the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture practices. The gradual loss of topsoil due to wind or water erosion can lead to the degradation of land and contribute to desertification. B) Leaching is the process by which minerals are washed out of the soil by water moving downwards through it. C) Salinization occurs when salt accumulates in the soil, usually as a result of irrigation in arid regions. D) Acidification refers to the decrease in soil pH, often caused by acid rain or the use of acidic fertilizers.

2. Dietary fiber, although not fully digested by the body, plays a crucial role in digestion. What is one of the main benefits of consuming sufficient dietary fiber?

Correct answer: C

Rationale: Consuming sufficient dietary fiber promotes satiety and gut health. Fiber adds bulk to the diet, which helps you feel full and satisfied after meals, reducing overeating. Additionally, fiber helps regulate bowel movements by promoting healthy digestion and preventing constipation. It also feeds beneficial gut bacteria, supporting a healthy gut microbiome. While fiber does not provide energy like carbohydrates, it is essential for overall digestive health and can help prevent various chronic diseases.

3. Which of the following phases of the cell cycle is characterized by the replication of DNA?

Correct answer: A

Rationale: Rationale: Interphase is the phase of the cell cycle where the cell spends the majority of its time and is characterized by three subphases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2). During the S phase of interphase, DNA replication occurs, leading to the duplication of the genetic material in the cell. This ensures that each daughter cell produced during cell division receives a complete set of genetic information. Mitosis is the phase of the cell cycle where the replicated DNA is divided equally between two daughter cells, while meiosis is a specialized type of cell division that occurs in sexually reproducing organisms to produce gametes. Cytokinesis is the final stage of the cell cycle where the cytoplasm divides, resulting in two separate daughter cells.

4. What is the breakdown product of creatine phosphate, an energy source used for short bursts of muscle activity?

Correct answer: D

Rationale: The breakdown product of creatine phosphate is creatine. Creatine phosphate is stored in muscle cells and rapidly converts to creatine to provide energy for short bursts of muscle activity, such as weightlifting or sprinting. It is not converted into glucose, lactic acid, or carbon dioxide. Creatine is then further broken down into creatinine, which is excreted in urine. Therefore, the correct answer is D: Creatine.

5. The property of a substance that resists a change in its shape is called:

Correct answer: D

Rationale: Elasticity - This refers to a material's ability to resist deformation and return to its original shape after stress is applied. Density, mass, and inertia are related to the substance itself, while viscosity reflects resistance to flow, not shape change.

6. The process of bone formation and breakdown is called:

Correct answer: C

Rationale: The correct answer is C: 'Remodeling.' Bone remodeling is the continuous process of bone formation (ossification) and breakdown (resorption). Ossification refers to the formation of bone tissue, while resorption is the breakdown and removal of old bone tissue. The term 'remodeling' encompasses both of these processes, making it the most appropriate choice. While ossification and resorption are part of bone remodeling, they do not cover the entire process on their own, hence 'All of the above' is incorrect.

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