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My biochemistry textbook says that "insulin increases glucose consumption that leads to elevation of G6P concentration".. But I'm failing to make a connection right here... Glucose consumption by what? by cells? Or is it about the glucose being absorbed in the glicolysis chain where glucokinase elevates G6P levels?

Hello. In my lab class I was conducting an experiment connected with detecting polyhydroxyl alcohols with Cu(OH)2 solution (It makes a violet solution if many hydroxyl groups are present). But in my lab report I am told to draw the structural formula of the complex compound that forms when we add Cu(OH)2 to inositol solution... What will it look like? Will there be a Cu atom for every pair of OH groups in inositol ring? Or one Cu atom will bond 4 OH groups from two inositol molecules? I incline to the other idea, my formula sketch is attached. Is this right?

Hello. Having in mind that this is my first post here, I'd like to say hello to everyone on this site. My name is Krzysiek, I'm 21 and currently studying first year of medicine. Right now I'm preparing for my first biochemistry exam. I'm using "Harper's Biochemistry", but the author's language ain't making it easy to understand This is the only paragraph that mentions the acid-base catalysis: "Acid-base catalysis can be either specific or general. By "specific" we mean only protons (H3O+) or OH- ions. In specific acid or specific base catalysis, the rate of reaction is sensitive to changes in the concentration of protons but independent of the concentrations of other acids (proton donors) or bases (proton acceptors) present in solution or at the active site. Reactions whose rates are responsive to all the acids or bases present are said to be subject to general acid or general base catalysis." For me it is so unclear! So, as far as I know only the H+ and OH- ions decide whether a particular compound is acidic or not. So how come "the rate of reaction is sensitive to changes in the concentration of protons but independent of the concentrations of other acids"? If there are other acids in the solution automatically the concentration of H+ ions increases and this is what the "specific" mechanism is sensitive to. I mean, in my opinion the presence of other acids induces the change of H+ concentration, so it's impossible that the "specific" catalysis won't be affected... Can someone please put this Harper's paragraph in a simpler language with regards to my reflections? Thanks in advance