For each of the following false statements, change the statement to make it true. Archaea are ancient bacteria that are the ancestors of modern bacteria. Bacteria differ from eukaryotes in having no nucleus, mitochondria, chloroplasts, or ribosomes. Instead of a cell wall, eukaryotic cells have an extracellular matrix for structural support. All the ribosomes found in a typical human muscle cell are identical. DNA is found only in the nucleus of a cell. Because bacterial cells have no organelles, they cannot carry out either ATP synthesis or photosynthesis. Even the simplest types of infectious agents must have DNA, RNA, and protein.

Cancer cells achieve proliferative immortality by activating or upregulating the normally silent human TERT gene (hTERT) that encodes telomerase, a protein with reverse transcriptase activity that complexes with other proteins and a functional RNA (encoded by hTR, also called hTERC) to make a ribonucleoprotein enzyme.

Explanation:

A rare cell that escapes crisis almost universally does so by reactivating telomerase and this cell can now become a cancer cell with limitless potential to divide. Almost all cancer cells have short telomeres and thus inhibitors of telomerase should drive such cancer cells into apoptotic cell death. Yet, each time a cell divides, the telomeres get shorter. When they get too short, the cell no longer can divide and becomes inactive or "senescent" or dies. This process is associated with aging, cancer, and a higher risk of death.

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