Select all correct statements about telomerase or about the relationship between telomeres, telomerase, and cancer. a) Telomere shortening usually leads to somatic cell death, but cancer cells are often immortal.
b) Telomeres in cancer cells are typically shorter than telomeres in the somatic cells of the same individual.
c) Unlike most somatic cells, cancer cells express telomerase, which prevents shortening of chromosome ends.
d) Cells with a deletion of the gene that encodes a telomerase protein are more likely to become cancerous.
e) Telomerase is a complex of RNA and protein.
f) Telomerase is a complex of DNA and protein.