Set 12: Form, Structure & Sense (Advanced)
Explanation
PASSAGE
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
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: C ('Exceed' is plural; 'efficiency' is singular.), D ('Have exceeded' is plural; 'efficiency' is singular.), B ('Exceeding' is a participle; the sentence needs a main verb.).
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