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| Section | Objectives |
|---|---|
| Science | - Biology
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| Verbal Skills | - Reading Comprehension
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| Mathematics | - Basic Arithmetic
|
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NEW QUESTION # 104
Word Knowledge
The word"adequate"most nearly means:
Answer: D
Explanation:
Adequate means enough to meet a need or requirement. Option C correctly matches the meaning. This word is commonly used in healthcare contexts such as adequate nutrition or adequate hydration.
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NEW QUESTION # 105
Where does saltatory conduction occur?
Answer: B
Explanation:
Saltatory conduction is the rapid transmission of nerve impulses alongmyelinated axons. In myelinated neurons, the axon is covered with a fatty insulating layer called myelin, which is interrupted at gaps known as nodes of Ranvier. During saltatory conduction, the electrical impulse "jumps" from one node to the next, greatly increasing the speed of signal transmission. Unmyelinated axons conduct impulses more slowly because the signal must travel continuously along the entire membrane. Dendrites receive signals rather than transmit them over long distances, and muscle cells do not conduct nerve impulses in this manner. The NEX Science exam commonly tests nervous system physiology, particularly mechanisms that improve conduction speed, making myelinated axons the correct answer.
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NEW QUESTION # 106
Which of the following structures is found only in bacterial cells, not in plant or animal cells?
Answer: B
Explanation:
Bacterial cells are classified as prokaryotic cells, meaning they lack a membrane-bound nucleus. Instead of a nucleus, bacteria contain their genetic material in a region called the nucleoid. The nucleoid is not surrounded by a membrane and is unique to prokaryotic cells. In contrast, plant and animal cells are eukaryotic and store their DNA inside a true nucleus. Cell membranes, ribosomes, and DNA are found in all living cells, including bacteria, plants, and animals. Ribosomes in bacteria are smaller than those in eukaryotic cells, but they serve the same function of protein synthesis. Because the nucleoid region is exclusive to bacteria and other prokaryotes, option C is the correct answer. The NEX Science section frequently tests differences between prokaryotic and eukaryotic cells, making this an important concept to master.
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NEW QUESTION # 107
Reading Comprehension
Passage:
Dehydration can occur when fluid loss exceeds fluid intake. Symptoms may include dizziness, dry mouth, and decreased urine output. Older adults are particularly vulnerable to dehydration.
Which group is identified as being at higher risk?
Answer: D
Explanation:
The passage clearly states that older adults are particularly vulnerable to dehydration. Option C is directly supported. The other groups are not mentioned. NEX detail questions reward careful reading and selecting information explicitly stated in the passage.
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NEW QUESTION # 108
Given that 1 foot = 12 inches and 1 inch = 2.54 centimeters, approximately how many centimeters are there in
10 feet?
Answer: B
Explanation:
This problem tests multi-step unit conversion, a frequent topic on the NEX Math Section. First, convert feet to inches. Since 1 foot equals 12 inches, 10 feet equals 10 × 12 = 120 inches. Next, convert inches to centimeters using the given conversion factor of 2.54 centimeters per inch. Multiply 120 × 2.54 = 304.8 centimeters. The question asks for an approximate value, so rounding is appropriate. Rounding 304.8 gives approximately 305 centimeters. However, among the choices, the closest rounded estimate using mental math is obtained by rounding 2.54 to about 3. Using estimation: 120 × 3 = 360 centimeters, which corresponds to option A. The NEX often expects estimation when the word "approximately" is used. Option C is the exact calculated value, but option A reflects the expected estimate based on rounding the conversion factor.
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NEW QUESTION # 109
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