Researchers have extended the life of a human cell by
A) removing the cap of the DNA molecule.
B) injecting it with telomerase.
C) rearranging the DNA sequences.
D) splicing the 18th and 19th chromosomes.

Question

Quizplus · Accepted Answer

Injecting the cell with telomerase can extend the life of a human cell by preventing the shortening of telomeres, which are the protective caps located at the ends of DNA molecules. Over time, telomeres naturally shorten and when they become too short, the cell can no longer divide and eventually dies. Telomerase can help to maintain the length of telomeres and prolong the life of the cell. Removing the cap of the DNA molecule (A), rearranging the DNA sequences (C), and splicing chromosomes (D) are not methods generally used to extend the life of human cells.

Researchers Have Extended the Life of a Human Cell by