cellular respiration. during photosynthesis the sun’s energy is captured & stored in the form...
TRANSCRIPT
Cellular Respiration
During photosynthesis the Sun’s energy is captured & stored in the form of carbohydrates & other organic molecules
What happens to this stored energy? Most of the stored energy will be used for
the life processes of the autotroph Some will be reserved & available to
heterotrophs, who in turn, use it for their own life processes
All cells break down complex organic compounds into simpler molecules
Cells use some of the energy released to produce ATP from ADP & phosphate
Respiration All cells break down complex organic
compounds into simpler molecules Breaking down releases energy stored in
the molecular bonds of the organic compounds
Some of the energy released to produce ATP from ADP & phosphate
Organic Compounds
No Oxygen
Fermentation(anaerobic)
Oxygen
Aerobic Respiration
ATP
ATPGlycolysis
Glycolysis 1st phase of cellular respiration Produces ATP & other products Little ATP formed Other products will follow one of two
additional pathways Which path followed depends on the
presence or lack of O2
Glycolyisis – a biochemical pathway 6 carbon chain molecule broken & 2 STP
molecules, through a series of steps, into 2 – 3 carbon molecules (pyruvic acid molecules) AND 4 molecules of ATP
2 ATP used & 4 made ! Happens in the cytosol
What happens to the Pyruvic Acid? Depends on whether or not oxygen is
present
Where does respiration happen? In the cytosol if no oxygen is present
Where does respiration happen? In the mitochondria if oxygen is present
The Outer Membrane
The outer membrane contains many complexes of integral membrane proteins that form channels through which a variety of molecules and ions move in and out of the mitochondrion.
The Inner Membrane Forms the inner folds of the cristae
Cristae Cristae are the finger-like projections of
the inner mitochondrial membrane and they increase the surface area for the electron tranport carriers and ATP synthase which are located in the membrane.
The Matrix
The matrix contains a complex mixture of soluble enzymes that catalyze the respiration of pyruvic acid and other small organic molecules.