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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Mathematics | 27.6% | - Algebra
|
| Topic 2: Verbal Ability | 35.6% | - Reading Comprehension
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| Topic 3: Science | 36.8% | - Human Physiology
|
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NEW QUESTION # 127
Review the image below.
If each division in the ocular micrometer below equals 25 micrometers, what is the length of the oval?
Answer: D
Explanation:
This question tests measurement interpretation using an ocular micrometer, a skill often assessed on the NEX Science exam. An ocular micrometer is a scale placed in the eyepiece of a microscope and must be interpreted based on the given scale value. In this problem, each division equals 25 micrometers. By carefully counting the number of divisions spanned by the oval in the image, the oval covers8 divisions. To find the total length, the number of divisions is multiplied by the micrometer value per division: 8 × 25 micrometers = 200 micrometers. The other answer choices represent common calculation errors, such as counting too few or too many divisions or using an incorrect multiplication factor. The key to these questions is slow, accurate counting and correct unit conversion. The NEX exam frequently includes microscopy-based questions to assess practical lab interpretation skills.
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NEW QUESTION # 128
What is the term used to describe random changes in DNA, which may be silent, negative, or positive, to the organism in which they occur?
Answer: D
Explanation:
A mutation is a random change in the DNA sequence of an organism. Mutations can occur due to errors during DNA replication, exposure to radiation, or chemical agents. These changes may have no effect (silent mutations), cause harm (negative mutations), or provide an advantage (positive mutations). Recombination refers to the exchange of genetic material during meiosis, not random DNA changes. Duplication involves copying a segment of DNA, and replication is the normal process of copying DNA before cell division. The NEX Science exam often emphasizes that mutations are a source of genetic variation and can influence evolution and disease. Understanding the different possible effects of mutations is essential for topics related to genetics, cancer biology, and inheritance.
NEW QUESTION # 129
Reading Comprehension
Passage:
Good nutrition is especially important during childhood because the body is growing rapidly. A diet lacking essential nutrients may result in delayed growth, weakened immunity, and difficulty concentrating in school.
Which consequence of poor nutrition is mentioned in the passage?
Answer: D
Explanation:
The passage explains that childhood nutrition plays a critical role in growth and development. It specifically states that a lack of essential nutrients can lead to delayed growth, weakened immunity, and difficulty concentrating. Option C directly reflects one of the consequences listed in the passage, making it the correct answer. The other options are either the opposite of what is stated or not mentioned at all. NEX reading comprehension questions often test the ability to locate explicit information rather than inferred benefits.
Selecting delayed growth shows careful attention to the details provided in the passage.
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NEW QUESTION # 130
At a certain hospital, onlyof all births are twins. What percent is that?
Answer: A
Explanation:
This problem requires converting a fraction into a percent, a frequent NEX skill. Begin by convertinginto a decimal. Divide 1 by 25:
1 ÷ 25 = 0.04.
Next, convert the decimal to a percent by multiplying by 100:
0.04 × 100 = 4%.
Thus, the correct answer is B. Option A (0.4%) results from moving the decimal only one place instead of two. Option C (1.25%) corresponds to, and option D (25%) equals. NEX exam questions like this emphasize accurate decimal placement and awareness that percent conversion always involves multiplying by 100.
NEW QUESTION # 131
Word Knowledge
The word"observe"most nearly means:
Answer: D
Explanation:
To observe means to watch carefully or notice attentively. Option A best matches this definition. In healthcare contexts, observation is a critical skill, making this a high-yield NEX vocabulary term.
NEW QUESTION # 132
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