1,699 Answered Questions for the topic biochemistry

Biochemistry Dna Nucleic Acids

05/21/19

Does DNA react in all of the ways most other acids do?
As I understand it from my basic chemistry, there are some fundamental reactions that exist between any acid and other substances for example acid-base reactions that form a salt, and the existence... more
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Biochemistry

05/20/19

Why must you use a pencil, and not a ink or felt-tip pen, to mark on the paper the origin of the spots of amino acid preparations?
This question is from a separations of amino acids lab
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Biochemistry Neuroscience Sensation

05/19/19

Why does getting certain chemicals in cuts hurt?
More specifically, shampoo. What are the mechanics of detecting a noxious chemical stimulus in terms of which receptors recognise what, how do they do it, and how is this information relayed to the... more
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Biochemistry Science Biology Chemistry

05/17/19

Draw a small section of a typical lipid bilayer
1.     Draw a small section of a typical biological lipid bilayer. Include at least one of each membrane lipid (i.e., glycerophospholipid, sphingolipid, and sterol). (40 pts.)a.     Within your... more
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05/15/19

Domains in cell membrane?
How is movement of proteins and lipids between different domains of cell membrane prevented?Why is the noncytosolic layer not able to do lateral movements between domains but cytosolic layer is... more
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Biochemistry Mitochondria

05/15/19

Why is FAD, rather than NAD+, reduced in the succinate dehydrogenase reaction of the Tricarboxylic Acid Cycle?
FADH<sub>2</sub> is produced in the conversion of Succinate to Fumarate in the tricarboxylic acid cycle. Why is this so? Why not NADH?
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Biochemistry Toxicology Antibody

05/15/19

Is antivenom fatal?
Antivenom is used for curing snake bites. Is it fatal when used without being bitten by a snake?
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05/14/19

Why is ATP the preferred choice for energy carriers?
Why is ATP the most prevalent form of chemical energy storage and utilization in most cells?
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05/14/19

Why do people say that trans fatty acids are bad for your health?
I've heard from several sources that trans FAs are bad for you and their consumption will lead to cardiac problems, and that they are indigestible.But I also learned from biochemistry that they... more
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Biochemistry Lipids Fat Metabolism

05/13/19

Synthesis of Fatty Acids Longer than 16 Carbons?
I understand that the human body when performing Fatty Acid Synthesis can synthesize only until C16 (palmitate). However the ER has desaturases and elongases. I know that desaturases are used to... more
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05/13/19

Can scientists create totally synthetic life?
This particular question has been of a great deal of interest to me, especially since it dives at the heart of abiogenesis.
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05/13/19

Simple diffusion of lipid-soluble molecules through phospholipid bilayer -- does anything get "stuck" in transit?
It's a pretty elementary concept, and when I first learned of it I don't think I had the foundations to even think of such a question, but I found myself the other day thinking about the... more
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05/13/19

Ocean Acidification
How does concentration, atmosphere and ocean temperature, and mixing affect solubility?Also, what are the affects if it goes reverse?Here is my reaction:CO2+H2O ↔H2CO3↔H↔HCO31-↔2H↔CO3
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05/13/19

Why is chlorophyll green? Isn't there a more energetically favorable color?
Chlorophyll being green means it absorbs light in the red and blue area of the spectrum. Isn't this the high and low energy light? Wouldn't plants get more energy if they absorbed light in the... more
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Biochemistry Cardiology

05/12/19

Why does the heart use lipids (and not glucose)?
Fetal hearts use glucose as their primary metabolic substrate. Adult hearts use free fatty acids, which are less efficient (require more $O_2$ to synthesize the same amount of ATP); however,... more
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05/12/19

Are there differences in cell membrane cholesterol levels between cell types?
With different cell types, and cell functions, are there distinct levels of cholesterol in each cell type's cell membrane, or do all cell types have a similar amount of cholesterol? I am assuming... more
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05/12/19

Why does hair turn grey or white, and why does it happen later for some?
The question is pretty simple: what is happening molecularly when hair turns grey or white? I would imagine that it is due to the lack of a particular compound. I'm also interested in why some... more
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Biochemistry Sleep Neuroscience

05/11/19

Why do we feel tired if we sleep excessively?
When we eat, finally we feel full. I know which mechanism causes the sensation of being full. But when we sleep excessively we often still want more sleep. Why does this happen? Is there a... more
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05/11/19

What makes us hungry?
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Biochemistry Neuroscience

05/11/19

What limits the maximum spacing of Nodes of Ranvier and which organisms tend to have the widest gaps?
Assuming that a longer distance between gaps in the myelin sheath is beneficial for an organism due to the increased propagation speed, what is the limiting factor in determining the maximum... more
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Biochemistry Dna Cell Biology Rna

05/11/19

Why is thymine not incorporated into mRNA?
I am aware that in transcription uracil bonds to adenine and not thymine. But what is it that actually prevents thymine from bonding to adenine in transcription, that is not present in replication?
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05/10/19

What is the purpose of gluconeogenesis?
The gluconeogenesis pathway seems quite pointless to me. I don't understand why an organism would want to spend energy to create a molecule that can then be metabolized again for less energy? The... more
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Biochemistry Rna

05/10/19

How is RNAse contamination in RNA based experiments prevented?
Does anyone have any suggestions to prevent RNAse contamination when working with RNA?I tend to have issues with degradation regardless of whether I use DEPC treated / RNAse free water and filtered... more
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05/10/19

During starvation, does the human body do anything to prioritize which organs receive nutrients?
When food is scarce, the body slows its metabolic rate to conserve energy. Are there any other systems or processes that prioritize which organs receive nutrients?
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Biochemistry Pharmacology

05/07/19

Meta-analysis of fruits in blocking Cytochrome family?
My professor says that some drugs cannot be used with grapefruit. I am trying to search a list of cytochromes and their effect to block members in the cytochrome family. Some in Cyt P450.**What is... more
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