00:03
So the question asks you to match each of the following with correct metabolic pathway that they can be intermediate for.
00:11
So this is a process of cellular respiration.
00:14
So first of all, let me write down the major step of these cellular respiration, and then we can see all these molecules can be intermediate for in which step.
00:24
So it start out, obviously, with glucose in the beginning.
00:29
And the very first step, the glucose is being converted into glycopyruvate.
00:43
And this step we call it glycolysis.
00:51
Now, next step, pyruvate will be converted to acetyl -coa.
01:02
And this step, we call this pyruvate oxidation.
01:19
Now, acetyl -coa enter the citric acid cycle, then it moves on to the oxidative phosphorylation.
01:47
During this process, the electric transport chain of mitochondria will convert the energy extracted from the citric cycle into atp.
02:09
Now, so during cellular respiration, we're using glucose as a starting point.
02:16
But when we eat food, we do not just eat glucose.
02:20
So there's other marked molecules that we consume.
02:24
They can also join this cellular respiration at different steps.
02:28
And they will actually be intermediate for the intermediates of cellular respiration.
02:35
So let's see which molecule can incorporate at which step.
02:40
So the very first step, when glucose turns into pyruvate, we call this process glycolysis.
02:48
Some other micro molecule can also metabolize and then join the glycolysis and then turn into pyruvate.
02:59
So the molecules that can join the pathway at this step is called sugars and glycerol.
03:16
They can actually be converted to pyruvate and then they can join the rest of the...
03:24
Basically, they blend into the pyruvate produced from glucose and so they can continue with the cellular respiration.
03:35
So this is how other sugars and glycerol join the cellular respiration.
03:41
So if we look at our old options during glycolysis, lactate is a sugar.
03:53
So lactate is going to join the cellular respiration with the step of glycolysis.
04:00
And the other one is glycerol.
04:02
So these two options will go into the first box, the glycolysis.
04:09
Now the next step, the pyruvate processing of acetyl -coa.
04:14
So this is the second step, the pyruvate oxidation.
04:20
Amino acid can join at different point of cellular respiration.
04:32
Some amino acid can actually be converted to pyruvate.
04:37
Some of them can be converted to acetyl -coa and some of them can join the citric acid cycle.
04:45
So amino acid is going to go into all three boxes.
04:50
So this means that the first box of glycolysis, you need to also add amino acid into it.
04:59
So you have three different items in the first box, lactate, glycerol, and amino acid...