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Quiz NEX - Efficient Nursing Entrance Exam (Math, Science and Verbal) Exam Forum

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NLN Nursing Entrance Exam (Math, Science and Verbal) Sample Questions (Q112-Q117):

NEW QUESTION # 112
Milk, pure water, lemon juice, and gastric juice were tested using a pH meter. Results are summarized in the chart below.
Substance | pH
Milk | 6.8
Pure water | 7
Lemon juice | 2
Gastric juice | 1
Which substance is the most acidic?

Answer: A

Explanation:
The pH scale measures acidity and alkalinity, ranging from 0 to 14. Lower pH values indicate higher acidity, while higher pH values indicate greater alkalinity. A pH of 7 is considered neutral. In the chart provided, gastric juice has a pH of 1, which is the lowest value listed, making it the most acidic substance. Lemon juice, with a pH of 2, is also acidic but less so than gastric juice. Milk is slightly acidic, and pure water is neutral.
Gastric juice contains hydrochloric acid, which aids digestion and destroys harmful microorganisms in the stomach. The NEX Science exam frequently tests understanding of the pH scale and its physiological relevance, particularly in digestive processes.
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NEW QUESTION # 113
Reading Comprehension
Passage:
Physical activity has been shown to reduce stress levels by promoting the release of endorphins. These chemicals help improve mood and overall well-being.
What is the effect of endorphin release?

Answer: A

Explanation:
The passage explains that endorphins released during physical activity improve mood and well-being. Option C directly states this effect. The other options contradict the information provided. The NEX exam often tests understanding of cause-and-effect relationships in health-related passages.
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NEW QUESTION # 114
Which activity is the least effective method of preventing the spread of diarrheal infections?

Answer: B

Explanation:
Diarrheal infections are most often spread through the fecal-oral route, commonly due to contaminated hands, food, or water. Washing hands with soap and water is the most effective method for preventing transmission.
Antibacterial solutions and patient isolation also reduce spread. Wearing a mask is effective for preventing respiratory infections but offers little protection against diarrheal diseases. The NEX Science exam emphasizes appropriate infection-control strategies based on the mode of transmission, making mask use the least effective option in this scenario.
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NEW QUESTION # 115
What is the result of crossing over during meiosis?

Answer: D

Explanation:
Crossing over is a key event that occurs during prophase I of meiosis. During this process, homologous chromosomes pair up and exchange corresponding segments of DNA. Specifically, non-sister chromatids exchange genetic material, which results in new combinations of alleles. The primary result of this exchange is increased genetic variation in gametes, which is essential for evolution and diversity within a species. While chiasmata are structures formed during crossing over, they describe the physical points of contact rather than the outcome of the process. Lining up at the metaphase plate and random assortment occur later during meiosis and are separate mechanisms of genetic variation. Therefore, the correct result of crossing over is the exchange of DNA segments between homologous chromosomes. This process ensures that offspring have unique genetic combinations that differ from both parents, which is a core concept tested on the NEX Science exam.
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NEW QUESTION # 116
The graph below shows the growth projections of four infants during their first year of life.

Based on these projections, how many weeks will it take for all infants to reach at least 30 pounds?

Answer: D

Explanation:
This question tests interpretation of a line graph, a common NEX skill. To answer, focus on the infant whose weight increases the slowest, becauseallinfants must reach at least 30 pounds. By examining the graph, Infant A has the lowest growth curve and reaches 30 pounds later than the others. Tracing horizontally from 30 pounds to Infant A's line and then down to the x-axis shows that this occurs at approximately 25 weeks.
Although some infants reach 30 pounds earlier, the question asks whenallinfants reach that weight, which is determined by the slowest-growing infant. Therefore, option D is correct. The NEX often includes graph- based questions that require identifying minimums or maximums across multiple data sets, so it is important to carefully read qualifiers like "all," "at least," or "no more than."
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NEW QUESTION # 117
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