Task: Question Answering
Input (English): Question: In relation to DNA replication, the term processivity indicates: 
 Options:  <1> Error rate of the polymerase. <2> Deletion of one or more bases in the DNA. <3> Specificity in the speed of replication. <4> The ability of the enzyme to catalyze multiple consecutive reactions without detaching from the substrate. <5> 1,2 and 3.
Output (English): 4