Nucleus; surrounded by a
nuclear envelope with
many pores
Ribosome: attached to the RER
ER: membranes
enclosing a fluid filled
space.
Golgi apparatus: fluid filled
flattened sacs.
Centriole: hollow
cylanders with a ring of
microtubules
Mitochondrian: double membrane,
contains enzymes involved in
respiration.
Protein transport
1. Proteins are made in the ribosomes
and are excreted or attached to the cell
membrane.
2. New Proteins that are
made at the RER are folded
and processed in the RER.
3. These are then transported to the golgi
apparatuse in vesicles where they are further
processed and enter more vesicles to be
transported around the cell.
Cell cyle and Mitosis
Cell cycle used to grow and divide.
2 parts; interphase and mitosis.
Mitosis needed for growth,
repair and asexual
reporduction.
INTERPHASE: DNA
unravelled and
replicated. DNA
content doubles.
Organelles replicated.
ATP increased.
PROPHASE: Chromosomes
condense. Centrioles move to
opposite ends. nuclear envelope
breaks down. Spindle starts to
form.
METAPHASE: Chromosomes
line up and attcahed to
spindle by centromere.
ANAPHASE:
Centromeres divide and
spindles contract.
TELOPHASE: Chromatids reach the
opposite poles and uncoil. Nuclear
envelope starts to form and
cytoplasm deivides.