How does the replication of repetitive sequences and fragile sites pose unique challenges to the replication machinery?

... phase become less radiosensitive than they are in other phases of the cell cycle. This paper is only available as a PDF. Keywords. Granulocyte/macrophage ... If a mutation occurs in a protein that regulates the cell cycle, e.g. p53 ... In which phase of the cell cycle is DNA replicated? G1 phase. S phase. G2 ... Actively dividing eukaryote cells pass through a series of stages known collectively as the cell cycle: two gap phases (G1 and G2); an S (for synthesis) ... 32 What happens during the S phase? DNA synthesis or replication. 33 Each chromosome originally is made of how many DNA molecules and how does this molecule ... Apr 14, 2016 ... ... (occurs before mitosis) 2:55 DNA and Chromosomes 4:07 Chromosome ... in teaching biology at the high school level. For more information ... Members of the Bcl-2 family play a major role in the patho-biology of head and neck cancer ... cycle and survival of endothelial cells and HNSCC and on the ... DNA is replicated during the S phase of. Mitosis versus meiosis. Before division, the cell is diploid, with two unique sets. Image source: By Gabi Slizewska. S phase (Synthesis; when the copying of DNA happens). ... These attack cancer cells during specific phases of the cell cycle, but never during the resting phase. ... phases: M, G1, S, and G2. M phase (mitosis) is usually followed by cytokinesis. S phase is the period during which DNA replication occurs. The cell grows (more. *(This usually occurs with mitosis, but in some organisms this is not so.) M-Phase (mitosis + cytokinesis). The events of eukaryotic cell division image 2 *( ...