Unlike normal cells, cancerous cells: have reduced levels of telomerase divide o

Question

Unlike normal cells, cancerous cells: have reduced levels of telomerase divide only a few times before succumbing to apoptosis have unusually short telomeres can maintain telomere length as they divide lack telomeres What allows each strand of DNA to serve as a template for a new DNA strand during replication? covalent bonding between nucleotide bases hydrogen bonds between the deoxyribose and the phosphate groups complementary base pairing between purines and purines on opposite strands complementary base pairing between pyrimidines and pyrimidines on opposite strands complementary base pairing between purines and pyrimidines on opposite strands

Explanation / Answer

Solution:
1)(C)Unlike normal cells,cancer cells have unusually short telomeres.When a cell is cancerous the it divide uncontrablly and it leads to shortness of telomeres.Further shortness of telomeres leads to death of the cell.

2)(e) Complementary base pairing between purines and pyrimidines on opposite strand allows each strand of DNA to serve as a template for a new DNA strand during replication.Purines are adenin(A) and guanine(G) and pyrimidine include cytosine(C) and thymine(T).

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