Microbiology Gene cassette is: A Circular, autonomously replicating element B Integrated elements that can excise to form a non-replicating circular transfer intermediate C Circular, non-replicating DNA segments containing only open reading frames D Integrated DNA segment that contains an integrase, a promoter, and an integration site 💡 Explanation Gene cassette is: ✓ Correct Answer: C. Circular, non-replicating DNA segments containing only open reading frames