10

Set 14: Form, Structure & Sense

Explanation

Answer: B

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?

A. exceeding
B. exceeds✓ Correct
C. have exceeded
D. exceed

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.).

🎉 Set Complete!

You've reviewed all explanations. Ready to try another set?