CAT 2021 Slot 1 — VARC Question 20
Four sentences that are a part of paragraph are given below; the sentences may or may not be in the right order; create the sequence that forms a coherent paragraph.
- In the central nervous systems of other animal species, such a comprehensive regeneration of neurons has not yet been proven beyond doubt.
- Biologists from the University of Bayreuth have discovered a uniquely rapid form of regeneration in injured neurons and their function in the central nervous system of zebrafish.
- They studied the Mauthner cells, which are solely responsible for the escape behaviour of the fish, and previously regarded as incapable of regeneration.
- However, their ability to regenerate crucially depends on the location of the injury.
Answer & solution
Answer: 2341
Easy
Para-jumble (TITA). Locate the opening sentence (introduces the topic, no back-reference), then chain on pronouns and logical links, and close with the broad final remark.
Opener = 2. Sentence 2 introduces the finding without referring back to anything: biologists "have discovered a uniquely rapid form of regeneration in injured neurons... in the central nervous system of zebrafish." It names the researchers and the discovery — the natural start.
2 to 3 (pronoun link). Sentence 3 begins "They studied the Mauthner cells..." — "They" = the biologists from sentence 2. So 3 follows 2, specifying what they examined.
3 to 4 (continuation). Sentence 4 begins "However, their ability to regenerate crucially depends on the location of the injury." "Their" refers to those Mauthner cells/neurons; it adds a qualification to the regeneration just described. So 4 follows 3.
Closer = 1. Sentence 1 widens the lens: in "other animal species, such a comprehensive regeneration... has not yet been proven." This contrast with the rest of the animal kingdom is the natural concluding note.
The coherent sequence is 2341.