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Results tagged with metabolism
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user 5144
Metabolism is the set of defined biochemical transformations occurring within the cells of living organisms.
3
votes
Accepted
carbohydrates and lipids as a source of energy? why?
First, it is a matter of the energy that food can provide. Here fat wins clearly (from the Wikipedia article on Food Energy):
Fat: 37 kJ/g
Ethanol (drinking alcohol): 29 kJ/g
Proteins: 17 kJ/g
Carbo …
- 52.7k
2
votes
Can chitosan affect the absorption of unsaturated fatty acid?
It seems that there is no difference in the effects of chitosan on the uptake of saturated and unsaturated fatty acids. The study cited below (which has been done on guinea pigs) fed the animals a die …
- 52.7k
6
votes
Reason for conversion of glucose to fructose in glycolysis
Avoiding diffusion is one reason to phosphorylate glucose, the other is that it is removed from the osmotic balance between inside and outside of the membrane, so it can be transported at a high rate. …
- 52.7k
4
votes
Why isn't the phosphoglycerate kinase reaction of the glycolysis pathway irreversible?
You have to look at the complete reaction including the cofactors. In general, you can drive a chemical reaction into directions which are not favorable by:
removing products from the environment (i …
- 52.7k
4
votes
Accepted
How are ketone bodies used?
First, there are three ketone bodies: Acetone (top), acetoacetic acid (middle), and beta-hydroxybutyric acid (bottom), see the illustration from the Wikipedia:
The second and the third are taken up …
- 52.7k
12
votes
Is lemon water an alkalizing agent in the body?
The blood pH is tightly controlled since variations are quite dangerous for us. Under normal circumstances the pH is 7.4 (with a normal range between 7.35 and 7.45). Below that we are talking about ac …
- 52.7k
12
votes
Accepted
What is the purpose of gluconeogenesis?
Gluconeogenesis is not the reversal of the glycolysis, but the generation of glucose from non-carbohydrate precursors (like odd chain fatty acids and proteins). The reason why we have this process is …
- 52.7k
6
votes
Accepted
Why would lactate be high in diabetics?
This condition is also known as "lactic acidosis" and can be pretty dangerous, since it influences the pH of the blood.
When we metabolize glucose to produce ATP and NADH it is metabolized finally to …
- 52.7k
1
vote
Accepted
bacterial cell wall degradation in humans
Humans have at least one enzyme which can break down D-amino acids, the D-amino acid oxidase (DAAO). They are able to break down these amoino acids, interestingly D-serine seems to play a role as a ne …
- 52.7k
9
votes
Why is carbon dioxide produced in alcohol fermentation but not in lactic acid fermentation?
Glycolysis needs a steady supply of NAD+ to happen - this is the driver for the anaerobic oxidation to lactate and ethanol, although this is energetically much less favorable than the complete oxidati …
- 52.7k
4
votes
Accepted
Consumption of NAD+ in glycolysis
NAD+ is important in this step, since it is co-factor for the glyceraldehyde-3-phosphate dehydrogenase (G3PDH), which acts as a acceptor for the hydrogen atom from the C1 (see below).
If you look a …
- 52.7k