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| Section | Weight | Objectives |
|---|---|---|
| Verbal Ability | 34% | - Reading Comprehension
|
| Science | 38% | - Chemistry
|
| Mathematics | 28% | - Measurement
|
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NEW QUESTION # 61
Veins throughout the body contain structures, indicated by arrows, in the image below.
The structures shown in the image prevent which of the following from occurring?
Answer: A
Explanation:
This question focuses on cardiovascular anatomy and physiology. Veins contain one-way valves that are especially important in the limbs, where blood must travel against gravity to return to the heart. These valves open to allow blood to move toward the heart and close to prevent blood from flowing backward. The structures indicated by the arrows in the image represent venous valves. Without these valves, blood could pool in the veins, leading to conditions such as varicose veins. Forward flow of blood is promoted, not prevented, by these valves. They do not obstruct blood flow under normal conditions, nor do they prevent blood from leaking into tissues-that function is related to capillary structure. The NEX Science exam frequently tests the functional significance of anatomical structures, and recognizing that venous valves prevent backflow of blood is a key cardiovascular concept.
NEW QUESTION # 62
A rectangle's length and width are 4 centimeters (cm) and 6 cm. What is
1
2
2
1
the area of this rectangle?
(Given Area = length × width.)
Answer: C
Explanation:
This problem tests area formulas and fraction application. First calculate the full area of the rectangle using the given formula: Area = length × width. Multiply 4 cm by 6 cm to get 24 cm². The question asks for one- half of the area, not the total area. Divide 24 by 2: 24 ÷ 2 = 12 cm². Therefore, option B is correct. Option C is the full area, not half. Option A results from subtracting instead of dividing. Option D represents an incorrect partial calculation. NEX geometry questions often require careful reading to determine whether the question asks for total area or a fraction of it.
NEW QUESTION # 63
The four main types of macromolecules found in our cells are lipids, carbohydrates, proteins, and
Answer: A
Explanation:
Macromolecules are large, complex molecules essential for life. The four major classes of biological macromolecules are carbohydrates, lipids, proteins, and nucleic acids. Carbohydrates provide energy and structural support, lipids are involved in energy storage and membrane structure, proteins perform a wide range of functions including enzymes and transport, and nucleic acids store and transmit genetic information.
DNA and RNA are examples of nucleic acids. The other answer choices-fatty acids, unsaturated fats, and phospholipids-are all types of lipids rather than separate macromolecule categories. The NEX Science exam often assesses whether students can distinguish between macromolecule categories and their subcomponents.
Recognizing nucleic acids as one of the four major macromolecules is fundamental to understanding genetics, protein synthesis, and cell function.
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NEW QUESTION # 64
Reading Comprehension
Passage:
Older adults may be at increased risk for falls due to decreased balance, vision changes, and muscle weakness.
Preventive measures such as exercise and home safety modifications can reduce fall risk.
What is the main purpose of the passage?
Answer: A
Explanation:
The passage discusses both causes of falls in older adults and strategies to prevent them. Option B accurately summarizes this purpose. The other options focus on details not emphasized. Purpose questions on the NEX often involve identifying both the problem and the proposed solution.
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NEW QUESTION # 65
Which action is an example of inequity in healthcare?
Answer: C
Explanation:
Healthcare inequity occurs when certain groups receive fewer resources or lower-quality care than others.
Filtering water for only one segment of a community creates unequal access to a basic health necessity, increasing health risks for those excluded. The other options promote fairness and equal access to care. The NEX Science exam often evaluates understanding of social determinants of health and ethical principles, making option C the clearest example of inequity.
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NEW QUESTION # 66
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