cellular biology Flashcards
eukaryotes vs prokaryotes
eukaryotes has nucleus
prokaryotes does not have nucleus
8 cellular functions of eukaryotes
movement
conductivity
metabolic absorption
secretion
excretion
reproduction
respiration
communication
cytoplasm
aqueous solution called cytosol
contains enzymes for metabolism
suspends and provides structure for organelles
storage for fat and carbohydrates
supports various organelle functions including synthesis/transport of proteins and hormones
cytoskeleton (3 functions)
- provides supportive matrix structure
- cellular movement
- allows cells to change their shape to engulf in the phagocytosis process
microfilaments in cytoskeleton
actin filaments 1: movement MSK
actin filaments 2: pseudopods to change cellular shape for phagocytosis
intermediate filaments: strong and not flexible, anchor
microtubule filaments: hollow and transport
movement filaments: microvilli e.g. sperm
nucelues
- genetic materials divison/replication
repari/RNA/protein information storage
function of the nucleolus:
transcription
nuclear envelope is connected to ___
ER (SER and RER)
RER (3 purpose)
- protein synthesis
- protein folding and supercoiling
- protein activation
SER (4 purposes)
- lipid synthesis
- CYP450 enzymes
- Glucose
- calcium stroage
golgi apparatus =
packaging centre
purpose of lysosome (3)
- macro particle breakfown
- autophagy of organelles
- autolysis of damaged cell
purpose of peroxisome (3)
1.breakdown free radicals
2. fatty acid/lipid/cholesterol metabolism
3: ethanol metabolism
two main oxidative enzymes in peroxisome
catalase
oxidase
___ contain hydrolytic enzymes
examples of hydrolytic enzymes
lysosome contain hydrolytic enzymes
they are protease, nuclease, lipase, glucosidase