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Classify the following characteristics of cells as occurring in a typical cell cycle or occurring in...
18. A biologist is studying programmed cell repaired, Based on this information, what would the biologist be stuu A. Cytokinesis Angiogenesis Apoptosis Metastasis E. Nondisjunction 19. Molecules which stimulate or inhibit cell division are referred to as: A. Control molecules B. Signaling molecules C. Contact molecules D. Transduction molecules Checkpoint molecules 20. Which of the following is not a characteristic of cancer cells? A. They undergo metastasis and promote angiogenesis B. They lack differentiation C. They are specialized D. They...
Write the letter of the correct answer on the first page. Control of entry into the cell cycle is essential. Unicellular eukaryotes that enter into it too soonyw have the necessary energy to complete it, leading to their demise, whereas in multicellular eukaryotes usually leads to cycle are controlled by proteins, problems with the genes that code for these proteins are a commorn source of error. These genes fall into two broad groups: 33 uncontrolled cellular division 32 Since the...
Cancer and Gene Regulation Why is a cell cycle control system needed for cell division? What happens when cells do NOT respond to the cell cycle control system and divide excessively? Tumor Proto-oncogeno (for protein that stimulates coll division) 6 Y DNA Benign Tumor= Mutation withln a control region of DNA Malignant Tumor Mutated promoter Metastasis Normal growth-stimulating protein in excess Oncogene Tumor-Suppressor Genes Proto-oncogene utled tara gese Samor-auppresr gane Many proto-oncogenes code for growth factors /Deletive nonimenig Normel grewt...
1. Damaged DNA is discovered during the G1 checkpoint. How does p53 react, and what are the possible results? 2. If S phase checkpoints detect nucleotides deficit, what happens to the dividing cell and the cell cycle? 3. What three conditions may be detected during the G2 checkpoints, and what are the two possible results if there is inadequate DNA or spindle fibers? 4. What two conditions are checked during the metaphase checkpoint? What happens if the cell “passes” the...