mitochondrial structure and functions

mitochondria

site of aerobic respiration

outer membrane

contains protein channels to let small molecules through

inner membrane/ cristae

impermeable to most materials…highly folded to give a larger surface area

stalks

attached to inner membrane…enzyme complex ATP synthase

ATP synthase

enzyme complex that synthesises ATP

matrix

where the link and Krebs cycle take place…enzymes for aerobic respiration

circular DNA and 70s ribosomes

proteins for enzyme production and gene replication

cristae surface area

enables membrane to hold many electron transport chain proteins and ATP synthase enzymes

active cells

larger and higher proportion of mitochondria with more tightly packed cristae to enable synthesis of more ATP due to larger surface area