Hi,
I am confused on how the difference in pH and membrane potential of the inside of the cell and the outside of the cell is measured.
Specifically, how does using a lipophilic cation help measure membrane potential? and how does measuring the concentration of weak acids and bases on each side of the membrane help measure the pH?
Thanks!
Hi,
During the transpeptidation reaction in peptidoglycan biosynthesis when the peptides are cross-linked, is the terminal D-alanine lost [i.e. in E. coli when DAP forms a peptide bond with D-ala of the new disaccharide]? Or does the terminal D-alanine remain and is later cleaved by the carboxypeptidation reaction.
Essentially, I'm confused by the difference between transpeptidation and carboxypeptidation.
If someone could help me clear it up that'd be great!
Thanks!
My idea of resonance structures must be Wrong
As is the central atom with two (-O-H), one =O and one -O(-) off it.
That is the Lewis structure. Couldn't the (-) charge be on any oxygen, making a minimum of 4 resonance structures?
Thanks!
So hydrofluoric acid is a weak acid, therefore F- is a strong base!
Hydroiodic is a strong acid, therefore I- is a weak base!
Carbonic acid is a weak acid, therefore HCO3- is a strong base!
I am not sure about LiH, but I don't know how to determine whether HF is weaker or stronger than HCO3-
i don't know how to answer this without going to the lab!
1. What is a benefit and one disadvantage of observing bacteria in Yogurt using a live whole mount compared to a Gram stain slide?
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