which of these is not an example of a lipid

HESI A2

Biology HESI A2 Practice Exam

1. Which of these is not an example of a lipid?

A. Butter
B. Wax
C. Canola oil
D. Honey

Correct answer: D

Rationale: Honey is not an example of a lipid because lipids are fat-related molecules that are insoluble in water, while honey is a natural sweet substance made by bees and primarily consists of sugars such as glucose and fructose. Butter, wax, and canola oil are examples of lipids as they are all composed of fat-related molecules that do not dissolve in water.

2. Two students _________ their professor about the possibility of obtaining a good grade in class.

A. Ask
B. Is
C. Was
D. Could

Correct answer: A

Rationale: The correct answer is 'Ask' because it maintains subject-verb agreement with 'two students,' requiring a plural verb 'ask' to match the plural subject. The other choices ('Is,' 'Was,' 'Could') do not agree with the plural subject and are thus incorrect. 'Is' is singular, 'Was' is the past tense form, and 'Could' indicates a possibility but does not fit the context of the sentence.

3. The force per unit area exerted against a surface by the weight of air above that surface in the Earth's atmosphere is the ______.

A. Atmospheric pressure
B. Barometric density
C. Aneroid pressure
D. Barometric pressure

Correct answer: A

Rationale: Atmospheric pressure is the correct term for the force per unit area exerted against a surface by the weight of air above that surface in the Earth's atmosphere. It is commonly measured in units such as pascals, millibars, or inches of mercury. Barometric density and aneroid pressure are not accurate descriptions for this phenomenon. Barometric density refers to the density of the atmosphere at a particular location, while aneroid pressure is linked to a type of barometer but not a comprehensive term for the force exerted by the weight of air.

4. What word is best to substitute for the underlined words in the following sentence? The staff sergeant and I reviewed the enlisted men’s records.

A. Us
B. We
C. They
D. He

Correct answer: B

Rationale: In the sentence, "The staff sergeant and I reviewed the enlisted men’s records," the pronoun "I" refers to the subject of the sentence, which is the speaker. When combining the staff sergeant and the speaker "I," the correct pronoun to use is "we," which is the plural form of "I." Therefore, the word "We" is best to substitute for the underlined words in the sentence. Choice A, "Us," is incorrect as it is an object pronoun and does not match the subject position in the sentence. Choice C, "They," is also incorrect as it refers to a third-party group, not including the speaker and the staff sergeant. Choice D, "He," is incorrect as it does not include both the staff sergeant and the speaker in the pronoun substitution.