PrepTest 155, Section 3, Question 17
This passage was adapted from an article published(449 more words not shown)
The words "that kind of(9 more words not shown)
- Athe ability to(10 more words not shown)
- Bthe creativity that(16 more words not shown)
- Cthe development of(17 more words not shown)
- Dthe ability to(23 more words not shown)
- Ethe ability of(13 more words not shown)
Reading the passage
Look just before “that kind of finesse.” The researchers are designing peptides that bind to two different crystals at once, like tiny pieces of glue. They need precise control over how molecules interact with particular circuit materials.
What we’re looking for
So the phrase points to carefully making the materials do the needed construction jobs. It isn't merely about observing tiny things or having a creative idea.
Working the answers
- A
Turning theory into an application is a broad description of research. It doesn't capture the particular molecular control illustrated by a peptide attaching to two selected crystals.
- B
The account doesn't describe this project as applying knowledge gained from DNA research. Belcher's abalone work supplies its starting point. More importantly, the closing example concerns precise manipulation, not simply the creativity of choosing a different research direction.
- C
The researchers need to make compounds interact in useful ways. Better observation alone isn't what the glue example illustrates. Watching a crystal and assembling it into a circuit are different tasks.
- D
Distinguishing peptides that bind from similar ones that don't is part of finding useful candidates. The final example goes further: researchers design molecules to perform a particular construction job. Sorting candidates isn't the full precision being described.
- ECorrect
Researchers must manipulate organic compounds to meet very specific circuit-building needs. A peptide that joins two different crystals simultaneously illustrates that control. The reference is to tailoring what the molecule does, so the necessary components can come together at the nanoscale.
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