2a - Cell Structure and Division Flashcards
function of a lysosome
contains digestive enzymes to break down unwanted cell debris/invading molecules
MEMBRANE BOUND
function of the nucleus
contains genetic material - DNA - site of replication and transcription
nucleolus
makes ribosomes
cell surface membrane
phospholipid bilayer - controls movement of ions/molecules in/out of cell.
ribosome
synthesises proteins, has RNA, no membrane
Golgi apparatus
processes and packages lipids and proteins - makes lysosomes - has vesicles to transport new molecules to CSM
mitochondria
site of respiration - has folded cristae and matrix with enzymes in for respiration
rough and smooth ER
rough - has ribosomes, folds proteins
smooth - no ribosomes, processes lipids
Plant cell extras?
chloroplast
cell wall
vacuole
chloroplast
thylakoid membranes stacked into grana connected by lamellae - site of photosynthesis - has stroma outside second membrane
cell wall
cellulose cell wall to provide support to prevent wilting - has plasmodesmata to allow movement
vacuole
contains cell sap and surrounded by tonoplast - maintains pressure to stop wilting - isolates chemicals
what do epithelial cells have?
villi and folded microvilli to increase surface area for transport of digested molecules
lots of mitochondria to provide energy for active transport
flagella
tail like structure that rotates to allow movement
cell wall
support - made out of murrain
