ATI TEAS 7
Chemistry
1. Balance the following redox reaction in acidic solution: I⻠(aq) + Cr₂O₇²⻠(aq) -> I₂ (aq) + Cr³⺠(aq). Identify the oxidizing agent and reducing agent.
- A. I⻠is oxidized, Cr₂O₇²⻠is reduced
- B. I⻠is reduced, Cr₂O₇²⻠is oxidized.
- C. Both I⻠and Cr₂O₇²⻠are oxidized.
- D. Both I⻠and Cr₂O₇²⻠are reduced.
Correct answer: A
Rationale: . I⻠loses an electron (oxidation), Cr₂O₇²⻠gains electrons (reduction).
2. What is a lifestyle practice that can benefit the lymphatic system?
- A. Consuming a high-sugar diet
- B. Maintaining a sedentary lifestyle
- C. Regularly engaging in moderate exercise
- D. Smoking cigarettes
Correct answer: C
Rationale: The correct answer is C: Regularly engaging in moderate exercise. Exercise can benefit the lymphatic system by promoting circulation and the movement of lymph fluid throughout the body. This helps to remove toxins and waste products, improving overall lymphatic function. Consuming a high-sugar diet (A) can have a negative impact on the lymphatic system by increasing inflammation and impairing immune function. Maintaining a sedentary lifestyle (B) can lead to poor lymphatic circulation and fluid retention. Smoking cigarettes (D) is harmful to the lymphatic system and overall health, as it can impair immune function and increase inflammation.
3. In a food chain, which trophic level captures energy from the sun?
- A. Decomposers
- B. Carnivores
- C. Producers
- D. Omnivores
Correct answer: C
Rationale: Rationale: Producers, such as plants, algae, and some bacteria, are the organisms in a food chain that capture energy from the sun through the process of photosynthesis. They convert sunlight into chemical energy, which is then passed on to other organisms in the food chain. Producers are at the base of the food chain and form the foundation for all other trophic levels to obtain energy. Decomposers (option A) break down organic matter, carnivores (option B) consume other animals, and omnivores (option D) consume both plants and animals, but they do not directly capture energy from the sun.
4. Which sentence uses the modal verb "should" correctly?
- A. You should have studied harder for the exam.
- B. I should be going now.
- C. She said she should have taken a different route.
- D. They should be arriving any minute now.
Correct answer: B
Rationale: Option B conveys an intention or expectation regarding the present or near future.
5. Which type of fiber is insoluble and promotes gut motility?
- A. Pectin
- B. Cellulose
- C. Beta-gluca
- D. Guar gum
Correct answer: B
Rationale: Rationale: A) Pectin is a soluble fiber found in fruits and vegetables. It forms a gel-like substance in the gut and can help lower cholesterol levels. B) Cellulose is an insoluble fiber found in plants, particularly in the cell walls of fruits, vegetables, and whole grains. It adds bulk to the stool and promotes gut motility by aiding in the movement of food through the digestive system. C) Beta-glucan is a soluble fiber found in oats and barley. It can help lower cholesterol levels and improve blood sugar control. D) Guar gum is a soluble fiber derived from guar beans. It can help with digestion and may have a role in managing blood sugar levels. In this case, the question specifically asks for the type of fiber that is insoluble and promotes gut motility, which is characteristic of cellulose.
6. Which statement BEST summarizes the author's perspective on bioremediation for plastic pollution?
- A. It is the only viable solution to the problem and should be prioritized.
- B. It is a promising approach but requires further research and development.
- C. It is less effective than traditional methods and poses environmental risks.
- D. It is irrelevant to the problem and will not make a significant impact.
Correct answer: B
Rationale: The passage acknowledges the potential of bioremediation while highlighting the need for further research, indicating a balanced perspective.
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