If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will:
Correct answer: B. Complete the cycle and divide
- A. Move directly into telophase
- B. Complete the cycle and divide
- C. Exit the cycle and switch to a non-dividing state
- D. Complete cytokinesis and form new cell walls
Explanation
If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will proceed with the cell cycle and divide. The G1 checkpoint, also known as the restriction point, is a critical control point where the cell assesses its readiness to proceed with DNA synthesis (S phase) and subsequent cell division. If conditions are favorable and the cell receives the necessary signals indicating that it has adequate resources and environmental conditions to proceed, it will progress through the cell cycle and divide.
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About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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