functions of the nucleus 1. role in cell division. 2. influences cytoplasmic events. 3. contains...
TRANSCRIPT
Functions of the Nucleus
1. Role in cell division.
2. Influences cytoplasmic events.
3. Contains codes for protein synthesis.
2. nuclear pore complexesa. nuclear poresb. exhibit selective permeabilityc. RNA needs to exit the nucleusd. proteins enter nucleus to regulate the DNA
Ribosomessubstructures that are the “protein factories” of the cellA. Can be free or attachedB. Not membrane-bound
made of rRNA and protein
Endoplasmic ReticulumA. Network of membrane-bound channels (tubules)
- the interior of the tubules is segregated from the rest of the cytoplasm
B. Two types of ERrough and smoothboth types are continuous with each other
(and the nuclear envelope)
Golgi ApparatusProducts packaged into vesicles for:
insertion into the cell membranesecretion from cell (secretory vesicles)incorporation into lysosome
LysosomesCan destroy harmful substancesCan digest food particlesRemove worn out organellesMust remain membrane-bound
Chloroplasts and mitochondria share similar characteristicshave their own circular DNAproduced by division of existing ones