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Biology Stack Part C
Part C: Mitosis
Question | Answer |
---|---|
What is interphase? | Cells growing and developing: 1st growth phase, synthesis phase, and 2nd growth phase. |
What happens in the Synthesis Phase? | The chromosome in the nucleus replicates --> 2 time chromosomes= 46 pairs. |
List the order of Mitosis (5) | Prophase, metaphase, anaphase, telophase, cytokinesis. |
What are the 3 main checkpoints? | 1. if nutrients lack to support growth 2. if the DNA hasn't been replicated or damaged 3. if the chromosomes haven;t attached themselves to spindle fibres and haven't moved to opposite sides during anaphase. |
What happens in metaphase? | Spindle fibre attaches on the chromosomes and line them up in the middle. |
What happens in anaphase? | Spindle fibre pulls half the chromosome towards each centriole. |
What happens in telophase? | Spindle fibres are back in the centrioles and nuclear envelopes are formed back around the 2 sets of chromosomes. |
What happens in Cytokinesis? | Cell membranes pinches up in the middle and divides into 2 daughter cells. |
How is cytokinesis of plant cell different from animal cell? | the golgi bodies carry vesicles that form a cell plate in between the two nuclei, once the cell plate joins the cell wall and two cell membranes from, the division is complete. |
What is Apoptosis? | cells die when it's too old to function, the organelle responsible is lysosomes. PS: all cells have a special function. |
What is the characteristic of a cancer cell? | undergo mitosis an unlimited number of times. |
Define Tumor | cells that clamp together due to uncontrollable multiply; it doesn't die on its own or function properly because its DNA became mutated. |
What happens in prophase? (3) | Centrioles move to opposite poles, nuclear envelope disappear, and chromatin coils up into chromosomes. |