Set 14: Form, Structure & Sense
Explanation
PASSAGE
Intriguingly, the enzyme's catalytic efficiency, measured in reactions per second, _______ that of any previously characterized enzyme by a factor of ten.
Which choice completes the text so that it conforms to the conventions of Standard English?
Detailed Answer Explanation
[Variation 2] This question tests your understanding of sentence function and text organization. 'Efficiency' is singular, requiring singular verb 'exceeds.' The parenthetical phrase 'measured in reactions per second' doesn't affect subject-verb agreement. Each sentence in a well-constructed text serves a specific purpose. Consider what role this sentence plays in the argument: does it introduce, support, contrast, or conclude an idea? Understanding why an author includes specific sentences helps you grasp the overall argument. Each sentence should serve a clear purpose: introducing ideas, providing evidence, acknowledging counterarguments, or drawing conclusions. Identify the role to understand the structure.
Key Evidence:
• "The enzyme's catalytic efficiency, measured in reactions per second"
• "that of any previously characterized enzyme"
Why others are wrong: D ('Exceed' is plural; 'efficiency' is singular.), C ('Have exceeded' is plural; 'efficiency' is singular.), A ('Exceeding' is a participle; the sentence needs a main verb.).
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