5 The Work of LifeWhat jobs do cells have to do for an organism to live…“breathe”___________________________________________________________take in & digest foodATPproteins, carbohydrates, fats, nucleic acidsgrowth, repair, reproduction & developmentATP
6 Our organelles do all these jobs! The Jobs of CellsCells have 3 main jobs____________________need energy for all activitiesneed to clean up waste produced while making energyproteins do all the work in a cell, so we need lots of themfor growthto replace damaged or diseased cellsOur organelles do all these jobs!
7 They’re like mini-organs! OrganellesOrganelles do the work of cellseach structure has a job to dokeeps the cell alive; keeps you aliveThey’re like mini-organs!Model Animal Cell
8 1. Cells need power! Making energy to fuel daily life & growth, the cell must…take in food & digest ittake in oxygen (O2)make ATPremove wasteorganelles that do this work…______________________ATP
9 Cell membrane Function Structure _______________________________ phosphate “head”Cell membraneFunction_______________________________O2,CO2, food, H2O, nutrients, wasteallows communication between cellsStructuredouble layer of fat______________________lipid “tail”
11 Food & water storage plant cells animal cells food vacuole central vacuoleanimal cellscontractile vacuole
12 Lysosomes Function ________________ Structure used to make energydigest broken organellesStructuremembrane sac of digestive enzymesLysosomesdigesting broken organellesvacuolesmall food particledigesting food
14 ATP Mitochondria Function Structure in both animal & plant cells ____________________________________sugar + O2 ATPfuels the work of lifeStructuredouble membraneATPin both animal & plant cells
15 Plants make energy two ways! ________________________make energy from sugar______________________sugar ATPmake energy + sugar from sunlightsunlight ATP & sugarATP = active energysugar = stored energybuild leaves & roots & fruit out of sugarsATPsugarATPATP
16 Mitochondria are in both cells!! animal cellsplant cellsmitochondriachloroplast
17 2. Cells need workers = proteins! Making proteinsto run daily life & growth, the cell must…read genes (DNA)build proteinsstructural proteins (muscle fibers)enzymes (speed up chemical reactions)signals (hormones) & receptorsorganelles that do this work…__________________________
18 Proteins do all the work! one of the major job of cells is to make proteins,because…proteins do all the work!structuralenzymessignalsreceptorsDNAproteinscells
19 Nucleus Function Structure control center of cell protects DNA instructions for building proteinsStructure__________________________ribosome factoryDNA
20 Ribosomes Function Structure __________________________ read instructions to build proteins from DNAStructuresome free in cytoplasmsome attached to ERRibosomes on ERThe genes for rRNA have the greatest commonality among all living things. There is very little difference in the DNA sequence of the rRNA genes in a humans vs. a bacteria.Means that this function (building of a ribosome) is so integral to life that every cell does it almost exactly the same way.Change a base and this changes the structure of the RNA whch causes it to not function.
21 Endoplasmic Reticulum Function__________________helps complete the proteins after ribosome builds themStructureribosomes attachedworks on proteinsmakes membranes
23 _____________ _____________ _____________ _____________ protein on its way!_______TO:____________________TO:TO:vesicle_____________TO:finished protein__________________________ _____________Making Proteins
24 Cells need to make more cells! Making more cellsto repair & reproduce, the cell must…copy their DNAmake extra organellesdivide the new DNA & new organelles between 2 new “daughter” cellsorganelles that do this work…____________________
25 Centrioles Function Structure __________________________ one pair in each cell
26 Our organelles do all those jobs! Cell SummaryCells have 3 main jobs___________________need food + O2cellular respiration & photosynthesisneed to remove wastesneed instructions from DNAneed to chain together amino acids & “finish” & “ship” the proteinneed to copy DNA & divide it up to daughter cellsOur organelles do all those jobs!