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31 Jul 2023, 20:00
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Question 1
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
51% (02:13) correct
49%
(02:16) wrong
based on 523
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
70% (01:04) correct 30%
(01:09) wrong
based on 489
sessions
History
Date
Time
Result
Not Attempted Yet
Few babies born to HIV-infected mothers carry the disease in utero, even though HIV is a blood-borne virus and there is a constant flow of blood through the umbilical cord that could infect the growing fetus. As genetic testing has demonstrated, this is because the human fetal immune system may develop separately from the adult immune system, and it may provide a measure of protection. When exposed to foreign cells, immune cells “activate” to become T-cells, which defend the organism. Fetal T-cells seem to be more tolerant of HIV and do not cause the reactions typically seen in HIV infection; these cells recognize the foreign cells but do not fight them, and the virus is not stimulated to destroy the T-cells, as happens when an individual has full-blown AIDS.
1. Which sentence provides the best summary of the passage?
A. Foreign cells cannot enter fetuses’ bloodstreams as easily as they can enter the bloodstreams of adults.
B. The reason few fetuses contract HIV from infected mothers is that their mothers’ T-cells protect them.
C. The fetal immune system may not be similar to the adult immune system.
D. T-cells affected by HIV are not activated in the fetal immune response and therefore remain more tolerant of foreign cells.
E. Fetuses rarely contract HIV in utero because the fetal immune system operates differently than the adult system.
A. Foreign cells cannot enter fetuses’ bloodstreams as easily as they can enter the bloodstreams of adults.
B. The reason few fetuses contract HIV from infected mothers is that their mothers’ T-cells protect them.
C. The fetal immune system may not be similar to the adult immune system.
D. T-cells affected by HIV are not activated in the fetal immune response and therefore remain more tolerant of foreign cells.
E. Fetuses rarely contract HIV in utero because the fetal immune system operates differently than the adult system.
2. Which of the following statements are suggested by the passage?
I. Fetuses are better protected from HIV than their mothers because of their respective immune systems.
II. If researchers could find a way to stop T-cells in adults from activating, adults would have the same health benefit as fetuses.
III. Fetal immune systems are more complicated than those of adults.
A. I Only
B. III Only
C. I and III Only
D. II and III Only
E. I, II, and III
I. Fetuses are better protected from HIV than their mothers because of their respective immune systems.
II. If researchers could find a way to stop T-cells in adults from activating, adults would have the same health benefit as fetuses.
III. Fetal immune systems are more complicated than those of adults.
A. I Only
B. III Only
C. I and III Only
D. II and III Only
E. I, II, and III
RC Butler 2023 - Practice Two RC Passages Everyday.
Passage # 259 Date: 01 Aug-2023
This question is part of RC Butler 2023. Click here for Details
Passage # 259 Date: 01 Aug-2023
This question is part of RC Butler 2023. Click here for Details
Kaplan GRE Verbal Workbook 2018
08 Jun 2024, 14:06
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OFFICIAL EXPLANATION QUESTION #1
In this question, you are asked to select the best summary of the passage. The main idea of the passage is that fetal immune systems do not operate in the same way as adult immune systems, and that provides protection from HIV to the developing fetus. Choice (E) paraphrases that summary and is indeed the answer. Choice (A) is not true according to the passage; HIV can enter the bloodstream, but the T-cells are tolerant and don't activate, which allows the HIV to pass through without attacking the T-cells. Choice (B) is outside the scope; nothing is said in the passage about the mothers' T-cells. Choice (C) is true according to the passage, but it is not a complete summary. The critical component of HIV resistance is not included in this choice. Choice (D) gets the facts from the passage wrong. According to the passage, T-cells activate in the fetal immune system but do not fight HIV in the typical way.
In this question, you are asked to select the best summary of the passage. The main idea of the passage is that fetal immune systems do not operate in the same way as adult immune systems, and that provides protection from HIV to the developing fetus. Choice (E) paraphrases that summary and is indeed the answer. Choice (A) is not true according to the passage; HIV can enter the bloodstream, but the T-cells are tolerant and don't activate, which allows the HIV to pass through without attacking the T-cells. Choice (B) is outside the scope; nothing is said in the passage about the mothers' T-cells. Choice (C) is true according to the passage, but it is not a complete summary. The critical component of HIV resistance is not included in this choice. Choice (D) gets the facts from the passage wrong. According to the passage, T-cells activate in the fetal immune system but do not fight HIV in the typical way.
08 Jun 2024, 14:07
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OFFICIAL EXPLANATION QUESTION #2
This question asks you to evaluate the statements and select those that can be validly inferred from the passage. Choice (A) summarizes the passage's main point. It's one correct answer. Choice (B) seems reasonable, but the passage doesn't go this far. Differences between the adult and fetal immune systems beyond their respective responses to HIV may make this statement untrue. There is nothing in the passage to suggest that choice (C) is a valid inference. The passage does not compare the complexity of the adult and fetal immune systems.
This question asks you to evaluate the statements and select those that can be validly inferred from the passage. Choice (A) summarizes the passage's main point. It's one correct answer. Choice (B) seems reasonable, but the passage doesn't go this far. Differences between the adult and fetal immune systems beyond their respective responses to HIV may make this statement untrue. There is nothing in the passage to suggest that choice (C) is a valid inference. The passage does not compare the complexity of the adult and fetal immune systems.
