1. cells Flashcards
what do all cells contain
plasma membrane
genetic material
cytoplasm
explain plasma memebrane
seperate content of cell to surroudings
explain genetic material
info for cell to carry out activities
explain cytoplasm
site of chemical reactions
unicellular
one cell eg. bacteria amoeba chlorella
single cell is responsible for functions of survival
cells
building blocks of life
what are the 7 functions of life
metabolism
response
homeostasis
growth
reproduction
excretion
nutrition
metabolism
chemical reactions inside cell
response
ability react towards stimulus
homeostasis
internal enviornment of cell within limits
growth
increase in size
reproduction
production of offspring
excretion
removal of waste products from cell
nutrition
getting material for growth production of energy
multicellular
more than one cell type eg. plant animals etc
cells differentiate to make tissues perform speialized functions eg red blood cells
differentiation
process which cell becomes more specialized , during this process some genes start to be used in function of cell; gene is expressed or unexpressed
differentiated cells- tissue- organs- organ system- multicellular organism
prokaryotic cells
no nucleus no membrane, bound organelles DNA not inclosed inside nucleus but found in region called nucleoid eg bacteria, archea etc
organelles
structures found inside cells perform specific functions
organelles in a prokarayotic cell
pili, cell wall, plasma membrane, nucleoid containing naked dna, cytoplasm, 70s ribosomes, plasmid, flagella
prokarayotic cell- plasma membrane
permeable membrane- control substances move in or out of cell
prokarayotic cell- cell wall
made of peptidoglycan- maintains shape of cell prevent cell from bursting
prokarayotic cell- pili
hair like structures- help bacteria adhere to eachother for transfer of DNA conjugation
prokarayotic cell- cytoplasm
gel like enclosed in cell- has enzymes catalyse chemical reactions inside cell
prokarayotic cell- flagella
whiplike structure- help bacteria move
prokarayotic cell- ribosome
70s type- protein synthesis
prokarayotic cell- nucleoid
region containing naked dna- DNA holds genetic info controls cell
prokarayotic cell- plasmid
ring of dna- help bacteria adapt to unusual situations eg. antibiotic resistance
eukarayotic cell
complex cells contain nucleus and membrane bound organelles dna enclosed un nucleus eg. plant animal fungi protists can be single or multi cellular organisms eg. amoeba is uni and eukarayotic
