Questions tagged [biosynthesis]

Biosynthesis is the process in which living organism synthesize molecules and substances they need. Examples would be the photosynthesis where in the end glucose is synthesized or melanin as the result of the melanin biosynthesis.

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In ketogenesis, why is acetacetyl-CoA not directly hydrolized to acetoacetate in ketogenesis?

Ketogenesis pathway maps show acetoacetyl-CoA converted to HMG-CoA and only then to the first ketone body acetoacetate. Why this detour instead of directly hydrolyzing off the CoA to get there in a ...
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Regulation of the concentration of precursors of DNA and RNA synthesis

What is the specific cellular process for regulating the amount of the four DNA bases (adenine, thymine, cytosine, and guanine) that are present in the cytoplasm of a cell? Basically, how do the cell'...
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Can the Human body Synthesise Vitamin D from Phytosterols?

I know that the human body can synthesise vitamin D from cholesterol, but can it do so from phytosterols?
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What medium is the bacteria used to synthesize B12 sourced from?

Would that be from water, soil, plants, funguses,...? I asked the question in Quora but that, at the time of posting in this forum, haven't been very helpful. I also have searched for the ...
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Calculation of NADPH molecules number needed to reduce a substrate in enzymatic reaction

I am inquiring if it is just simply possible - as it seems to be - to calculate the number of NADPH molecules needed by an enzyme (let say for example Dihydrofolate Reductase DHFR) to reduce the ...
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how long would oxidation of ammonia solution to nitrates take?

A hot topic among amateur chemists is making nitric acid from ammonia. While not as useful, im interested in making nitrate salts from ammonia as well. A simple idea is to just infect ammonia solution ...
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If calcium ions and cholesterols are found on the surface of the skin, would it be possible for Vitamin D to be synthesised on the skin?

Calcium ions are abundantly found in the extracellular space of the stratum corneum area, the top most layer of the skin (Skin Barrier and Calcium; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5929942/...