Oncogenes are mutated forms of genes. Oncogenes can transform a cell into a tumor cell. Some tumor cells are benign, while others are malignant. How does the presence of an oncogene lead to the formation of a tumor?
a.) ATP production is inhibited.
b.) Cell division is unregulated.
c.) Somatic cell growth is inhibited.
d.) Antibody activity is unregulated.

I believe the answer is B. My reasoning is, a cancer cell is a mutated cell a tumer is a group of the cancerous cells bunched together which can be a sign of unregulated cell growth. I believe that is the answer but I may be wrong.

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luisvaschetto luisvaschetto · Answer 2 · 2021-11-23T13:37:14+01:00

The presence of an oncogene leads to the formation of a tumor because cell division is unregulated (Option b).

The cell cycle has specific restrictions points that control the progression of the cell cycle by activating specific signaling pathways (e.g., programmed cell death or apoptosis).

In cancer cells, specific genes called oncogenes are found overexpressed, thereby dysregulating these restriction points of the cell cycle.

In consequence, cancer cells are no longer able to control their own division and therefore proliferate in an uncontrolled manner.

For example, the N-myc gene is an oncogene overexpressed in neuroblastoma, which is a childhood tumor of embryonal neuronal cells.

In conclusion, the presence of an oncogene leads to the formation of a tumor because cell division is unregulated (Option b).

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