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Glucose

Glucose

Sugar substituteWikipedia

Search complete. 17 mentions across 12 episodes found for "Glucose".

Sep 17, 2026

Wesley MorrisHOST
15:00
... because we figured out a bit, a different way.
Wesley MorrisHOST
15:02
Dextrose is, like, puffing things up in a way we don't need.
Wesley MorrisHOST
15:05
So what, at some point, were things like YouTube and TikTok doing, where were they positioned in the formula, and are they still there?
Chris MolanphyGUEST
15:15
Okay, if you will indulge me.
speaker_0HOST
4:05
Now there's a little more complexity than that, but one does lead to the other.
speaker_0HOST
4:10
The simplest illustration of a food carbohydrate, the one that is the single fuel of our brains and muscles, is glucose.
speaker_0HOST
4:20
Its chemical formula is C6H12O6, that is a string of six carbons.
speaker_0HOST
4:27
And on each one, there's a hydrogen off to one side and an oxygen link to a hydrogen off the other.
speaker_0HOST
4:34
Now this string most often links itself into a ring and which side the Hs and the OHs are on determines some behaviors of the glucose.
speaker_0HOST
4:43
But the trickiness isn't done.
speaker_0HOST
4:45
Does it bend to the left or to the right? Does it form a ring of five with an extra carbon and three hydrogens and an oxygen hanging off of it? Still a form of glucose, just a little different.
speaker_0HOST
4:56
And when you twist things around and move a double bonded oxygen, C6H12O6 is also the formula of fructose and mannose.
KellyHOST
4:37
Now that RNA polymerase can copy the genes from the structural locus, so ribosomes can create enzymes, and you can break down lactose into usable sugars, you aren't going to starve today.
KellyHOST
4:50
But what happens when all the lactose is gone? Glucose is still absent, so the safety is turned off.
KellyHOST
4:58
We could turn on the lac operon if we needed to, but without lactose, the operator can't turn on the transcription switch.
KellyHOST
5:06
Without a suitable food source, if you turned on the lac operon, you'd only starve faster.
KellyHOST
5:30
In general biology, you may have heard the terms locking key used to describe enzymes because the shape of the molecule must be near perfect for the enzyme to be able to work.
KellyHOST
5:41
The repressor on the lac operon is what we call allosteric, which simply means there need to be two keys.
KellyHOST
5:50
Remember I said switch and safety? Lactose is one of those keys, that's the inducer, Glucose blocks the other keyhole, this is the repressor.
KellyHOST
6:00
So glucose must be gone and lactose must be plugged in for the repressor to be able to be removed by a third protein that's always available.
Chris van TullekenHOST
12:23
Okay.
Chris van TullekenHOST
12:24
And to be clear, the patients you want to know their numbers are patients who are living with pre-diabetes or type 2 diabetes rather than all of us measuring our glucose.
Tamara HibbertGUEST
12:33
glucose.So I think it depends on your own risk.
Tamara HibbertGUEST
12:38
So it's knowing your numbers allows you to know your risk.
Tamara HibbertGUEST
12:41
So if I had somebody who had a, a strong family history of diabetes, for example, I think it would be a good piece of information for them to know, and the reason for that is because sometimes they can do something about it, so it, there isn't an inevitability that they will go on and develop diabetes.
John NitigAUDIENCE
38:04
Oh, I love to eat carbohydrates, 'cause you see, it screws up my A1C.
John NitigAUDIENCE
38:09
'Cause type one beat us as a way with D-G-L-U-C-O-S-E. And-
Josie BidwellHOST
38:17
[laughs]
John NitigAUDIENCE
38:17
... there's a billion hidden messages in there.
Shara PerryHOST
26:50
And that ATP is the molecule that cells can actually use to perform work.
Shara PerryHOST
26:56
Glucose.
Shara PerryHOST
26:57
which we get from eating carbohydrates, right, can be broken down through glycolysis into pyruvate.
Shara PerryHOST
27:04
And pyruvate can then enter the mitochondria and it can be converted into acetyl-CoA, which feeds into the citric acid cycle and oxidative phosphorylation.
Sam SmithHOST
35:13
And what we're talking about at this point is we're talking about the oxidation state of each element in a molecule.
Sam SmithHOST
35:19
So take, for example, glucose, which is C6H12O6.
Sam SmithHOST
35:23
We could be looking at the oxidation state for carbon, the hydrogen, the oxygen, and we'd be assigning numbers to each of those.
Sam SmithHOST
35:30
And some of them would be negative, some of them would be positive, but each individual atom would be assigned an oxidation state.
Dana FryerHOST
3:31
So there was a lot of things like labs, meds, nutrition support that I didn't need to write down.
Dana FryerHOST
3:36
Dextrose is always 3.4 calories per gram.
Dana FryerHOST
3:40
No, right? So that doesn't need to be on my study sheet.
Dana FryerHOST
3:43
But the things that I don't know need to be on there because then what that takes you is you now have a study sheet on a single topic that is the most important and things you need to know.
John CampbellHOST
2:54
It combines that into sugars and it also gives us oxygen.
John CampbellHOST
2:59
So I used to teach my students the equation six molecules of H2O plus six molecules of carbon dioxide plus the energy from the sun gives C6H12O6, which is a simple sugar molecule, plus six molecules of oxygen.
John CampbellHOST
3:12
Now, I thought we were being told that there was too much carbon dioxide in the atmosphere, but photosynthesis is that which takes carbon dioxide out of the atmosphere.
John CampbellHOST
3:23
So am I missing something here? And I also kind of like to breathe oxygen occasionally as well, because that's produced by photosynthesis.
John CampbellHOST
10:02
The energy puts that together.
John CampbellHOST
10:03
It generates energy in the bonds of the C6H12O6, which is the simple sugar, which then goes on to form more complex sugars and starches.
John CampbellHOST
10:12
And you can put a bit of sulfur in and turn it into a protein and all sorts of clever things that plants do, providing they have the energy to do so.
John CampbellHOST
10:20
And the only place to get the energy to do so is from the sun.

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