Pernicious anemia and Vitamin B12

Loss of Vitamin B12 leads to a disease called Pernicious anemia.The chemical reaction involved is discussed here.

PROTEINS AND ENZYMES

In answer to the question "discuss the general structure of enzyme proteins and how the structure of enzymes allows them to fulfuil their biological role" I have written the following short account. I cannot exceed 400 words. Can you let me know if I am on the right track. Please note I have not included any references in this ...continues

Working with chemical equations

Series of questions attached about working with chemical equations.

Please Help

What is the pH of 4% (w/v) solution of Ca(OH)2? Assume that Ca(OH)2 is 100% dissociated.

finding titration curve with unknown volumes

Draw the titration curve for the titration of a 0.05M solution of acetic acid with 0.1M sodium hydroxide. I can find the initial pH of the solution, but I am not given any initial volumes so can you point me in the right direction of how to solve this problem? I asked my professor and she said that I don't need volumes to do t ...continues

Comparing the best inhibitor given km, kcat and ki

Here are the following numbers I have calculated; We were given a substrate to plot againist velocity and 3 enzymes to plot as well. From the data: Enzyme A Ki= 2.575 Kcat = 50 Km= 3.33 Enzyme B Ki = 10.33 Kcat = 16.65 Km = 33.3 Enzyme C Ki= 1.00 Kcat = 10 Km = .2 I'm having trouble understan ...continues

Solving Buffer Solution Problems

Calculate the concentration of acetic acid and sodium acetate necessary to prepare a buffer solution of pH = 5.1 that is 0.25M in total acetate. The pKa of acetic acid = 4.76

isomerization

The isomerization of a phosphorylated gluscose molecule from 1-p to 6-p form with standard free energy change=-1.74kcal/mole. Find the equilibrium concentration ratio of glucose-p in the two isometric states.

Membrane transport

I need a lot of detail on this. Please do not take this unless you can answer it fully. Thank you! Discuss various aspects of membrane transport: passive, facilitated types and active. This needs to be very detailed so I can get a full understanding of it. Thank you

Carbonic Anhydrase - Calculate Turnover Number

Carbonic anhydrase of red blood cells, which has a molecular weight of 30,000, is among the most active known enzymes. It catalyzes the reversible hydration of CO2, which is important for the transport of carbon dioxide from the tissues to the lungs. CO2 + H2O <--> H2CO3 If 10μg of pure carbonic anhydrase catalyzes the ...continues