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AP Biology172 views·Updated Aug 9, 2026Introduction to the Cell Cycle and Interphase
Practice identifying the phases of interphase (G1, S, G2) and analyzing the regulatory checkpoints that ensure DNA integrity before mitosis.
A cell in a petri dish is treated with a chemical that inhibits the synthesis of DNA polymerase. In which phase of the cell cycle will this cell most likely be arrested?
- A cell in a petri dish is treated with a chemical that inhibits the synthesis of DNA polymerase. In which phase of the cell cycle will this cell most likely be arrested? — G1 phase
- A researcher measures the amount of DNA in a population of eukaryotic cells. She finds that a group of cells has twice the amount of DNA as the cells in G1. These cells are most likely in which phase? — G2 phase
- During the cell cycle, the p53 protein acts as a tumor suppressor by stopping the cycle if DNA damage is detected. At which checkpoint is p53 most active to prevent the replication of damaged DNA? — G1 checkpoint
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