Name the three key processes in the catabolism of glucose that produce ATP in the presence of ox

Name the three key processes in the catabolism of glucose...

Key Concepts

Glycolysis

Glycolysis is the metabolic pathway where glucose is broken down into pyruvate in the cell’s cytoplasm. This process generates a small amount of ATP and NADH, serving as the first step in cellular respiration and setting the stage for further energy extraction in the presence of oxygen.

Citric Acid Cycle

Also known as the Krebs cycle, the citric acid cycle takes place in the mitochondria where pyruvate is further oxidized. This cycle produces key electron carriers NADH and FADH2, along with a small amount of ATP, which are essential for the subsequent production of ATP via the electron transport chain.

Oxidative Phosphorylation

Oxidative phosphorylation, which includes the electron transport chain and chemiosmosis, is the process by which the energy from NADH and FADH2 is used to create a proton gradient across the mitochondrial membrane. This gradient drives the synthesis of a large amount of ATP through ATP synthase, making it the primary ATP-producing mechanism in aerobic respiration.

Transcript

00:01 Okay, you want to answer this question? let's talk about aerobic respiration.

00:05 It starts with glucose.

00:08 It is going to be broken down into two pyruvate molecule.

00:16 Okay, this process is called glycolysis, and it occurs in the cytosal.

00:23 After this, each pyrobat is going to be converted to acetal co -a by a process called pyruvate oxidation.

00:33 And this occurs in mitochondria.

00:35 There is production of an avh here and also an adh here finally each acetalcoy is going to enter a cycle called the crept cycle it has many names the cyclic acid cycle for example or the cidric acid cycle okay and there is going to be also production here of ndh fadh but at the end of the day all of these nadh and fadh too produced in metabolism they are going to they are going to transport electrons to the electron transport chain in mitochondria 2 and it is going to produce atp okay they say that one in a bdbh produce 3 80ps while each faddh 2 produces 2 atp atop okay in the electron transport chain of mitochondria we are going to require oxygen in order for it to work because oxygen is going to accept the electrons that these molecules are transferring okay in this coupling is very important in order to produce atp.

01:43 If oxygen is not available, then atp is not going to be produced by oxidative for radiation in the electron transport chain.

01:50 Okay, so if oxygen is unavailable, then the electron transportation is not going to work and atp is not going to be produced.

02:01 So practically oxygen is essential for the electron transport chain.

02:09 Also, remember that when this nadh molecule donate electrons to the electron transport chain, they are going to become oxidized again, and they are going to be transformed into this, into the oxidized form.

02:26 And the same is going to happen for fadh2.

02:29 It is going to donate the electrons to the electron transport chain, and it is going to become oxidized.

02:35 Okay, and this is good because these oxidized form are going to go back to metabolism in order to help production of more nadh.

02:46 That is going to go again to the electron transport chain, to donate electrons and produce more atp, okay? the same with fad.

02:54 So what happens when oxygen is not available? well, if oxygen is not available, then the electron transport chain is not going to work and nadh is not going to be able to donate the electrons to the electron transport chain, and the same for fadh too.

03:10 So, nadh levels and fadh levels are going to guise.

03:17 Here are going to rise.

03:19 Okay...

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