Mitosis Flashcards
What does mitosis make?
2 identical daughter cells for growth differentiation and repair
What are the stages of mitosis?
Interphase, prophase, metaphase, anaphase, telophase
What happened in interphase?
- Organelles are synthesised and the cell grows
- dna is replicated
- organelles grow and energy stores increase
What happiness in prophase?
Chromosomes condense and become more visible and they appear as chromatids joined July the centromere. Nuclear envelope disintegrates and nucleotides appears
What’s happiness in metaphase?
Spindle is formed, chromosomes starch to the spindle by their centromere. And chromosomes line up at the equator of the cell
What happens in anaphase?
Centromere spilts, sister chromatids separate to opposite poles of the cell
Hat happiness in telophase?
Nuclear envelope reforms, spindle disintegrates and chromosomes become thinner
What is viral replication?
Where cells replicate by attaching to their host cell with the attachment proteins on their surface
Why is viral replication needed?
Because non living things cannot undergo cell division
How does viral replication work?
Cell injects nucleic acid into the host cell. The nucleic acid is combined with the host cells dna and starts producing viral components which are assembled into new proteins
How do prokaryotic cells divide?
By binary fission
What happens in binary fission?
Circular dna molecule replicated and both copies attach to the cell membrane
How does binary fission work?
Plasmids replicate, cell membrane grows between the two dna molecules, the cell punches inwards between the two dna molecules dividing the cytoplasm, and a new cell wall forms between the two dna molecules
What is cancer?
Uncontrollable cell division
What happens to cause cancer?
Genes that regulate mitosis become damaged