Set 7: Text Structure (Intermediate)
Explanation
PASSAGE
The central dogma of molecular biology states: DNA -> RNA -> Protein. However, retroviruses violate this unidirectional flow. They use reverse transcriptase to turn RNA back into DNA, inserting themselves into the host genome.
Which choice best describes the relationship between the sentences?
Detailed Answer Explanation
This question tests your understanding of how the text is organized. Rule: Dogma (Uni-directional). Exception: Retroviruses (Turn RNA back to DNA). Authors structure their writing purposefully to guide readers through their ideas. Identify the organizational pattern (cause-effect, compare-contrast, problem-solution) and how each part contributes to the whole. Authors choose organizational patterns deliberately to enhance their message. Recognizing whether a text uses chronological order, cause-effect, compare-contrast, or problem-solution helps you understand the author's purpose and follow the logic.
Key Evidence:
• "central dogma"
• "However ... violate"
• "reverse transcriptase"
Why others are wrong: B (No cure.), A (Result is reverse, organization is Rule -> Exception.), C (Related.).
🎯 Keep Practicing!
Master all sections for your best SAT score