A method, performed by a base station, of transmitting and receiving data in a wireless communication system, and an apparatus therefor are provided. The method includes determining whether a code block (CB), one of a plurality of CBs included in a transport block (TB), is scheduled for a transmission based on code block group transmission information (CBGTI), in response to the CB being scheduled for the transmission, determining a length of a sequence for the CB based on a number of CBs of the TB or a number of scheduled CBs of the TB, generating the sequence for the CB according to the determined length of the sequence, and transmitting a signal including the generated sequence.