ACT Practice Science P1

Based on the information presented, if the transfer of the linear copy was interrupted 50 min after the transfer began, how many complete genes would have been transferred to the recipient bacterium?

• 2
• 3
• 4
• 5

Based on the model presented by Student 3, if all 6 genes are replicated and the first gene replicated is Gene G, the third gene replicated would be:

• Gene F
• Gene A
• Gene S
• Gene X

Which students believe that any of the 6 genes on the plasmid can be the first gene transferred to a recipient bacterium?

• Students 2 and 3
• Students 2 and 4
• Students 3 and 4
• Students 2, 3, and 4

Suppose that the model presented by Student 1 is correct and that the transfer of genes between 2 bacteria was interrupted after 45 min. Based on the information provided, which of the following genes would NOT have been transferred from the donor bacterium to the recipient bacterium?

• Gene G
• Gene X
• Gene R
• Gene S

. Suppose that Student 2’s model is correct and that the transfer of genes between 2 bacteria was interrupted after 30 min. Under these conditions, which of the following genes would definitely NOT be transferred from the donor bacterium to the recipient bacterium?

• Gene A
• Gene R
• Gene G
• Gene X

Suppose that all 6 genes are transferred from a donor bacterium to a recipient bacterium. Under this condition, which student(s) would argue that Gene A could be the last gene transferred?

• Student 2 only
• Student 4 only
• Students 2 and 4 only
• Students 3 and 4 only

Suppose that the transfer of genes between 2 bacteria was interrupted, that the last gene transferred was Gene A, and that no incomplete copies of a gene were transferred. Based on this information, Student 1 would say that transfer was most likely interrupted how many minutes after the transfer began?

• 15
• 30
• 45
• 60