3.4 eukaryotic structure Flashcards
definition of eukaryotic cell
a cell which contains membrane-bound organelles
structures within the nucleus
nucleoplasm
nuclear pores
nucleolus
nuclear envelope
DNA - as chromatins
function of nucleus
contain chromatins
production of rRNA and ribosomes
control centre of photosynthesis
nuclear envelope features
double membrane which controls entry and exist of materials in nucleus, contains reactions taking place within the cell
REM on outside
nucleoplasm features
contains specific conditions which differ from cytoplasm
nuclear pores features
allow passage of large molecules like mRNA out of the nucleus
nucleolus features
most densely packed DNA area
assembles ribosomes and rRNA
DNA combines with histone proteins to form chromatins (just densely packed)
features of a mitochondrion
cristae, matrix, double membrane
sometimes DNA and ribosomes
function of mitochondrion
aerobic respiration
double membrane of mitochondrion features
controls substances passing in and out of organelle
inner membrane made up of cristae
cristae features
provide a large surface area for enzyme attachment and therefore increased aerobic respiration
matrix features
contains proteins, lipids, ribosomes and DNA allowing for protein production
golgi apparatus features
cisternae (stack of membranes), with hollow vesicles
golgi apparatus function
package and transport substances from ER
-form glycoproteins
-form lysosomes
-transport, modify and store lipids
-produce secretory enzymes
what do vesicles do
transport lipids/proteins
