which of the following statements best deines an organelle

ATI TEAS 7

ATI TEAS Science Test

1. Which of the following statements best defines an organelle?

A. Layer of polysaccharides outside the plasma membrane of cells.
B. Abnormal infectious proteins.
C. Specialized structures within a cell.
D. Collection of tissues used to serve a specific function.

Correct answer: C

Rationale: The correct answer is C: 'Specialized structures within a cell.' An organelle is a specialized subunit within a cell that has a specific function. Organelles are membrane-bound structures found within the cytoplasm of eukaryotic cells, each performing distinct roles that contribute to the overall functioning of the cell. Choices A, B, and D are incorrect. Option A describes the glycocalyx, which is a layer of polysaccharides outside the plasma membrane of cells. Option B refers to prions, abnormal infectious proteins. Option D defines an organ, a collection of tissues used to serve a specific function, rather than an organelle within a cell.

2. What is the primary function of tight junctions, specialized regions between animal cells?

A. Communication between cells
B. Anchorage between cells
C. Selective passage of materials
D. All of the above

Correct answer: C

Rationale: The correct answer is C: Selective passage of materials. Tight junctions act as specialized structures between animal cells that create a barrier to the passage of materials. Their primary function is to prevent the leakage of extracellular fluid and control the selective passage of molecules between cells. This selective control is crucial in regulating the movement of substances across cell layers. Tight junctions do not directly facilitate communication between cells or provide anchorage between cells, as their main role is to regulate the passage of materials. Choices A and B are incorrect as tight junctions do not primarily serve for communication or anchorage between cells.

3. Choose the sentence with the correct pronoun usage.

A. “This mystery concerns my friend Watson and me.”
B. “This mystery concerns me and my friend Watson.”
C. “This mystery concerns my friend Watson and I.”
D. “This mystery concerns I and my friend Watson.”

Correct answer: A

Rationale: The correct pronoun usage is 'me' when it is the object of a verb or preposition. In this sentence, 'me' is the object of the verb 'concerns,' so it should be used instead of 'I.' Additionally, the correct order for objects in a sentence is 'my friend Watson and me.' Choice B is incorrect because 'me' should come before 'my friend Watson' to maintain the correct order. Choice C is incorrect as 'I' is incorrectly used instead of 'me.' Choice D is incorrect because 'I' is used incorrectly as the object pronoun, and the order is reversed.

4. What part of speech is the word 'results' in the sentence 'The students eagerly awaited the results'?

A. Verb
B. Noun
C. Adjective
D. Adverb

Correct answer: B

Rationale: In this sentence, 'results' is the direct object of the verb 'awaited,' functioning as a noun. Hence, option B, 'Noun,' is correct. The students were eagerly waiting for what? The results - which makes 'results' a noun in this context. Choices A, C, and D are incorrect. 'Results' is not describing a verb, an adjective, or an adverb in the sentence; it is the object of the students' anticipation, indicating a noun.

5. The Black Panther Party (BPP) was another activist group that formed around the same time as and was similar in function to the NAACP. What revision best improves this sentence?

A. NO CHANGE
B. was another activist group that
C. had a lot of members that
D. was another school that

Correct answer: B

Rationale: Describing the BPP as 'another activist group' provides clarity and relevance. Choice B correctly identifies the Black Panther Party as an activist group, aligning with its historical context and function. Choices C and D introduce irrelevant or inaccurate information, making them incorrect. Choice A, 'NO CHANGE,' leaves the sentence vague and does not provide the necessary clarification about the nature of the Black Panther Party.