1,699 Answered Questions for the topic biochemistry
06/18/19
Why is carotene in carrots?
Internet says that the carotene is an important pigment for photosynthesis and UV-protection. That explains its accumulation in leaves. I suppose colored fruits are more appealing to animals, so...
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Biochemistry Proteins
06/17/19
Is ATP Synthase a channel or an enzymatic protein?
Today in a biology lecture about plasma membranes and functions of proteins, we learned about channel and enzymatic proteins along other kinds of proteins. ATP synthase is considered an enzyme that...
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06/17/19
Why are proteins always made in N to C direction??
Why are proteins always synthesized from the *N*-terminus to the *C*-terminus? Can there be any “reverse” peptide-bond formation to synthesize proteins in the *C*-terminal to the *N*-terminal...
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06/17/19
What is the biochemistry of love?
How is love induced between humans? (e.g. between mother and child,couples,etc)?Does the phenomenon of love exist in other mammals, too?
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06/17/19
Role of calcium chloride during competent cell preparation?
I am aware of the fact that $CaCl_2$ settles down on the cell wall making it less negative may be by forming bond with Teichoic acid. Also due to the positive charge it attracts DNA (DNA is...
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06/16/19
How does water buffer a sudden drop in temperature?
A property of water is that it is slow to heat and cool. According to my biology book, some energy from an increase in temperature would spent breaking hydrogen bonds, so that temperature does not...
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How does hypochlorous acid inactivate viruses?
I was reading how bleach was used very widely as a disinfecting agent during the 2014 West Africa ebola outbreak and am interested in the mechanisms with which hypochlorous acid inactivates...
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06/15/19
Why does the ring finger not move independently?
Why is it that we need to move little finger in order to move ring finger with it? For example, put your palm on a table and fold your middle finger inside. You won't be able to move your ring...
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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...
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How do you prepare 250 ml of 1M NaCl solution from a solid? NaCl has MW= 58.4 g/mole
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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...
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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...
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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...
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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...
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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...
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What does the term "ketogenic" mean in biochemistry?
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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...
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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...
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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...
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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...
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