PrepTest 117, Section 1, Question 20
The survival of nerve cells, as well as(453 more words not shown)
Which one of the following(10 more words not shown)
- ASome of the(22 more words not shown)
- BAlthough NGF was(16 more words not shown)
- CIn her research(14 more words not shown)
- DSome neurotrophic factors(13 more words not shown)
- EThe effects of(21 more words not shown)
Reading the passage
We know NGF belongs to a larger group of chemicals, but the detailed account stays with NGF. This is another open support question. A claim about other factors still needs support; we can't assume that everything true of NGF is true of them.
Working the answers
- A
The experimental effects are attributed to the protein identified as NGF. No part of those effects is assigned to another factor.
- B
We aren't told how thoroughly other factors are understood compared with NGF. More thoroughly here makes that comparison; it doesn't merely mean knowledge of the other factors has improved over time.
- C
We learn that other factors were found, not that Levi-Montalcini identified them during these decades.
- DCorrect
The opening describes neurotrophic factors broadly as regulating survival and some specialized functions. We then get specific roles for NGF, the first of many such factors, but no comparable account of what the other factors do. D recognizes those unspecified functions.
This needn't mean the other factors have entirely different functions from NGF. That was the sticking point in trying to connect the answer with the text: not specifically identified is not the same as different. Nor are we moving that modifier onto the unnamed factors. It is their functions that the account doesn't spell out.
- E
The other factors' existence doesn't establish that they cause the same effects seen in the chick-embryo experiment. That additional claim isn't supplied.
More Detail questions
Learn the LSAT our way
Our platform drills Detail questions at your level and adjusts as you improve.