Neurons
CAT 2021 Slot 1 · Verbal Ability & Reading Comprehension · Medium · Verbal Ability
This is a medium Verbal Ability & Reading Comprehension question from the CAT 2021 Slot 1 paper. It tests Verbal Ability. The full answer key and a step-by-step explanation are below — try it yourself first, then reveal the solution.
The four sentences (labelled 1, 2, 3, 4) below, when properly sequenced would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence of the four numbers as your answer:
- 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.
2341
Explanation
Sentence 2 opens with the discovery in zebrafish. Sentence 3 specifies 'They studied...' referring to the biologists in 2. Sentence 4 qualifies the regeneration ability of these cells ('However, their ability...'). Sentence 1 contrasts this finding in zebrafish with other animal species. Thus, the order is 2341.
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