1,722 Answered Questions for the topic biochemistry

06/15/19

Are Gram negative bacteria classified as such because of their negative membrane potential?
Does the membrane potential usually quoted for Gram negative bacteria (*e.g.*, *E. coli*) refer to the potential across both membranes? - If yes, then does the potential fall more over the inner or... more
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Biochemistry Biology Chemistry Mcat

06/14/19

How do you prepare 250 ml of 1M NaCl solution from a solid? NaCl has MW= 58.4 g/mole
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Biochemistry Biology Mcat Microbiology

06/14/19

What is the fluid mosaic model?
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Biochemistry Dna Molecular Genetics

06/14/19

What is the origin of "melting" in molecular genetics?
I'm reading some papers about prokaryotic transcription mechanisms, and I've come across a term I haven't heard before: *DNA melting* or *promoter melting*. After reading a bit, it's pretty clear... more
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Biochemistry Proteins Protein Folding

06/14/19

Is it possible to isolate and analyse intermediates of protein folding?
I would like to know if there is an assay which could allow us to analyse a protein before it has assumed its 3D functional form.While studying structural biology, I only came to know the forces... more
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Biochemistry Hematology

06/13/19

Why does ammonium oxalate cause swelling of RBCs?
From *Pre examination procedures in laboratory diagnosis* by Walter Guder :> ...It consists of three parts by weight of ammonium oxalate which> causes swelling of erythrocytes balanced by two... more
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Biochemistry Lab Techniques Sds Page

06/13/19

What kind of "size" does SDS-PAGE separate by?
What is the exact property of the protein that affects migration of bands in SDS-PAGE; is it length, volume, or mass?For example, will `GGGGGGGGGG` (glycine 10-mer; mw <600) migrate more or less... more
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Biochemistry Amino Acids Proteins

06/13/19

Why is leucine amino acid used the most in proteins and tryptophan the least?
The amino acid leucine, is used in proteins more than others. Leucine with 9.1 percent (its average in more than 1.150 different proteins) is used most and tryptophan with 1.4 percent is used less... more
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Biochemistry Biology Chemistry Mcat

06/13/19

What does the term "ketogenic" mean in biochemistry?
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Biochemistry Botany Photosynthesis

06/12/19

Why does the oxygen produced in the photosynthesis come from water and not carbon dioxide?
In the photosynthesis equation:$$\\ce{6CO2 + 6H2O ->[sunlight] C6H12O6 + 6O2}$$The only place where we have 6 molecules of $\\ce{O2}$ is in $\\ce{6CO2}$. Then it reacts with $\\ce{6H2O}$ to form... more
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Biochemistry Blood Circulation

06/12/19

How does alum help in blood coagulation?
I recently came across a test in my chemistry book which says that potash alum, $\\ce{K_2SO_4.Al_2(SO_4)_3.24H_2O}$ is used on cuts and bruises, because it coagulates the blood quickly. The... more
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06/11/19

Why are plants unable to take up Phosphorus directly in their organic form like Phytic Acid?
I am researching acquisition strategies of phosphorus by decidious trees. I am reading a lot that plants take up nutrients as their inorganic form. In the case of P according to literature this is... more
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06/11/19

How are fat soluble vitamins absorbed by the body?
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06/10/19

What is the difference between the mitotic spindle and microtubules?
In mitosis, I understand that the centromeres line up on the spindle. I also know that the centrioles form microtubles between the centromeres during mitosis in the metaphase. But, are microtubles... more
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Biochemistry Biology Mcat Human Biology

06/10/19

What is glycogen?
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06/09/19

Why don't membrane proteins move?
I understand that based on their tertiary structure, intrinsic proteins have hydrophobic non-polar R-groups on their surface and that they 'interact with the hydrophobic core of the cell membrane... more
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Biochemistry Proteins

06/09/19

What is the process of degradation of proteins into amino acids inside living cells?
Just like beta oxidation does our cells have a distinct mechanism for degradation of proteins? There are processes for degradation of amino acids but where does these amino acids come from, is it... more
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06/09/19

Is tyrosine hydrophobic or hydrophilic?
I’ve seen tyrosine classified as a hydrophobic amino acid due to its aromatic ring in some textbooks and as hydrophilic due to its hydroxyl group in other textbooks. How does tyrosine actually... more
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Biochemistry Proteins

06/09/19

How does protein denaturation work?
I was wondering how protein denaturation works.1. Are there covalent bonds, such as disulfide bridges involved, or is it based purely on non-covalent bonds such as hydrogen bonds? Why is... more
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06/08/19

Conjugate acids and bases
What are conjugate acids and bases?
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06/05/19

Out of the Cell: toward the ribosome

Which is the cellular organelle that has two parts: Big and Small?
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Biochemistry Chemistry Mcat Teas

06/05/19

What is the difference between molarity and molality?
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06/05/19

Why do Kupffer cells not attack malarial sporozoites?
During malaria, why don't Kupffer cells (hepatic macrophages) attack the _Plasmodium_ sporozoites and stop schizogony, thus saving us from the disease?
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06/05/19

What is the difference between a cathode and an anode?
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Biochemistry Genetics Proteins Rna

06/04/19

Where do amino acids get attached to tRNA and where is it synthesized?
Some very basic parts of transcription/translation seem to be left out in various literature. I can't find the answer to this anywhere:How exactly is tRNA synthesized? I realize that mRNA is... more
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