Final Answer:
T1 termination sequence (ter sequence) stops C. Both leading and lagging forks.
Step-by-step explanation:
The T1 termination sequence, also known as the ter sequence, plays a crucial role in halting the progress of C. both leading and lagging forks during DNA replication. In the context of DNA replication, leading and lagging refer to the two strands of the DNA double helix being synthesized in opposite directions. The leading strand is synthesized continuously in the 5' to 3' direction, while the lagging strand is synthesized discontinuously in the 3' to 5' direction through the formation of Okazaki fragments.
The ter sequence acts as a termination signal for the replication machinery, signaling the end of the replication process. It prevents the formation of additional DNA fragments beyond the necessary length. The termination of both leading and lagging forks ensures the accurate and complete replication of the entire DNA molecule.
In terms of the molecular biology involved, the ter sequence may contain specific DNA motifs recognized by termination proteins. These proteins can interact with the replisome, the complex of enzymes responsible for DNA replication, causing it to dissociate and terminating the replication process. The termination of both leading and lagging forks is essential for maintaining the integrity of the genetic information and preventing any errors or incomplete replication.