Gene cassette is a term used to describe a DNA sequence that can be easily integrated into larger DNA molecules or gene expression systems. Some of the synonyms that can be used in place of gene cassette may include gene module, gene block, gene clone, gene segment, or genetic unit. The gene cassette typically contains functional genetic elements such as promoters, coding sequences, and terminator sequences that can be easily manipulated and modified to suit specific research or therapeutic applications. These interchangeable terms can help researchers, geneticists, and bioengineers in their work towards developing new gene therapy techniques or understanding the genetic mechanisms that underlie various diseases.