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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Verbal Ability | 35.6% | - Reading Comprehension
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| Topic 2: Mathematics | 27.6% | - Algebra
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| Topic 3: Science | 36.8% | - Human Physiology
|
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NEW QUESTION # 128
The four main types of macromolecules found in our cells are lipids, carbohydrates, proteins, and
Answer: D
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 # 129
Reading Comprehension
Passage:
Stress can affect both physical and mental health. Short-term stress may improve alertness, but chronic stress can weaken the immune system, increase blood pressure, and contribute to anxiety and depression.
Which effect of long-term stress is mentioned in the passage?
Answer: C
Explanation:
The passage distinguishes between short-term and chronic stress. While short-term stress may increase alertness, chronic stress is associated with negative health effects. One of the effects specifically mentioned is increased blood pressure. Option C is therefore correct. Options A and D describe benefits not associated with chronic stress in the passage. Option B is incorrect because the passage states that chronic stress weakens, rather than strengthens, the immune system. The NEX exam often includes questions that test the ability to identify contrasting ideas within a passage, such as short-term versus long-term effects.
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NEW QUESTION # 130
Reading Comprehension
Passage:
Sleep plays a critical role in memory consolidation. During certain stages of sleep, the brain processes and stores information learned throughout the day. Lack of sleep has been linked to impaired judgment, slower reaction times, and decreased academic performance.
Which conclusion is best supported by the passage?
Answer: D
Explanation:
The correct answer must be directly supported by the information in the passage. The passage clearly explains that sleep helps the brain process and store information, which is essential for memory consolidation. It also states that lack of sleep negatively affects cognitive abilities such as judgment and reaction time. Therefore, the conclusion that memory formation is affected by sleep is well supported. Option A is incorrect because the passage emphasizes mental and cognitive effects, not just physical health. Option C is directly contradicted by the passage's mention of impaired functioning due to lack of sleep. Option D exaggerates the information; while sleep affects academic performance, the passage does not claim it is the sole factor. On the NEX exam, supported-conclusion questions require selecting an answer that is neither too extreme nor unsupported by the passage.
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NEW QUESTION # 131
Review the image below.
If each division in the ocular micrometer below equals 25 micrometers, what is the length of the oval?
Answer: B
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 # 132
Review the diagram below of the human eye.
Structure number 1 is necessary in order for the eye to
Answer: A
Explanation:
Structure number 1 in the diagram represents the lens of the eye. The lens plays a crucial role in focusing incoming light onto the retina so that clear images can be formed. It changes shape through a process called accommodation, allowing the eye to focus on objects at varying distances. Protection from debris is mainly the function of the cornea, eyelids, and eyelashes. Regulation of light entering the eye is controlled by the iris, which adjusts the size of the pupil. Picking up light stimuli is the role of rods and cones located in the retina.
Because the lens is responsible for bending and focusing light precisely onto the retina, option A is correct.
The NEX Science exam frequently tests the relationship between eye structures and their functions, particularly focusing mechanisms.
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NEW QUESTION # 133
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