Notes

he electron transport chain is a set of
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enzymes which is located on the inner
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mitochondrial membrane and it is the
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main source of energy in the aerobic

pathway of energy generation
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hello guys and welcome to method defied
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in this video we will study about the
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overview the concepts the role of
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various enzyme complexes and energy
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calculations in the electron transport
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chain before beginning make sure to hit
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00:39
and other stuff before watching the
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video on electron transport chain also
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make sure to watch the videos on krebs
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cycle glycolysis and beat oxidation you
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can find the links for the videos in the
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description of this video
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now let's talk about the overview of the
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electron transport chain first
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the mitochondria has a outer
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mitochondrial membrane a inner
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mitochondrial membrane the space between
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these membranes is called the inter
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membrane space and inside we have the
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matrix of the mitochondria if we look at
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a close section of the membrane
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structure of the mitochondria we can see
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the structure of the electron transport
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chain so here we have the outer
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mitochondrial membrane the inner
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mitochondrial membrane the inter
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membrane space the inner mitochondrial
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membrane contains four sets of enzyme
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complexes which are named from one to
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four in Roman numerals the matrix of the
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mitochondria
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also contains numerous other cycles like
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Krebs cycle and beat oxidation if you
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have watched the video on these topics
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you know that these cycles produce
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reducing equivalence called nadh and
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fadh2 these reducing equivalents contain
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electrons which are donated to this set
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of enzyme complexes the electrons then
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travel from the first to the fourth
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enzyme complex and in this movement
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energy is generated this energy is
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utilized in pumping hydrogen ions into
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the intermembrane space from the matrix
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of the mitochondria this continuous
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pumping of hydrogen ions into the
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intermembrane space causes the
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generation of a higher concentration of
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hydrogen ions in the intermembrane space
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as compared to the matrix of the
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mitochondria this generates a positive
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charge in the intermembrane space and a
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negative charge in the matrix of the
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mitochondria this is called the
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electrochemical gradient the hydrogen
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ions cannot cross against this
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electrochemical gradient because the
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inner mitochondrial membrane is non
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permeable to ions so here we require a
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special transporter
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the enzyme ATP synthase comes into play
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the ATP synthase transports hydrogen
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ions into the matrix of the mitochondria
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and uses the energy generated from the
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flow of hydrogen ions to phosphorylate
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adenosine diphosphate into adenosine
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triphosphate this is the basis of
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generation of energy in the form of ATP
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which is a currency of energy in our
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body now let's talk about the var