Question

cancer, the uncontrolled growth of cells, often results in a tumor, or mass of abnormal cells. some cancerous tumors consist of many cells that are much smaller than normal. according to this statement, what part(s) of the cell is (are) most likely being affected? g1 g2 s m

Explanation:

• G1 phase: In the cell cycle, the G1 phase is when the cell grows in size, makes proteins and organelles. If cells are much smaller than normal in a cancerous tumor, it is likely that the G1 phase (where cell growth occurs) is affected as the cells don't have enough time or proper regulation to grow to a normal size before proceeding to other phases of the cell cycle.
• G2 phase: This phase is mainly for checking DNA replication and preparing for mitosis. It is more about DNA - related checks and mitosis preparation rather than cell size growth.
• S phase: This is the phase of DNA synthesis. The key event here is DNA replication, not cell size determination.
• M phase: This is the mitosis (cell division) phase. While improper mitosis can lead to cancer (uncontrolled cell division), the question specifically mentions cell size (much smaller than normal), which is more related to the growth - oriented G1 phase.

Answer:

G1