Search found 14 matches

by samoyan
Fri Nov 30, 2007 5:06 am
Forum: Molecular Biology
Topic: Acid-Base Equilibria & Neutralization
Replies: 6
Views: 8812

blcr11, thank you very much for the explanation. I got it now.
by samoyan
Tue Nov 27, 2007 6:29 pm
Forum: Molecular Biology
Topic: Acid-Base Equilibria & Neutralization
Replies: 6
Views: 8812

Thank you for the help. According to first reactions of neutralization, the heat given off by the reaction was calculated: Experimental results: 50 mL of 2.0 HCl , 50 mL of NaOH and 50 mL of 2.0 NaOH was used in these reactions. HCl + NaOH --> NaCl + H2O (Q = - 4660.11 J) HCl + KOH --> KCl + H2O (Q ...
by samoyan
Tue Nov 27, 2007 5:57 am
Forum: Molecular Biology
Topic: Acid-Base Equilibria & Neutralization
Replies: 6
Views: 8812

Acid-Base Equilibria & Neutralization

Sorry, I didn`t find chemistry section on this forum. I have a question regarding neutralization of HCl with NH4OH (or NH3) weak base. In lab we neutralized 50 mL of 2.0 M NH3 (weak base) with 50 mL of 2.0 M HCl (strong acid). I can`t find how many moles of water was produced from this reaction. 0.1...
by samoyan
Sat Nov 17, 2007 5:06 pm
Forum: Molecular Biology
Topic: Questions about Enzymes
Replies: 7
Views: 10015

Thank you for explanation. Which answers do you think are correct ones?

1). E
2). D

I have one more question. Is it possible that very low or high pH will denature a protein (enzyme) completely, so that it lost its original linear sequence of amino acids?
by samoyan
Sat Nov 17, 2007 5:29 am
Forum: Molecular Biology
Topic: Questions about Enzymes
Replies: 7
Views: 10015

Questions about Enzymes

I had a test yesterday and I`m not sure whether I answered some questions correct or not. Here are some about enzymes. 1). A change in environmental pH can inhibit the proper functioning of an enzyme by: a) changing the charge of its active site. b) altering the enzyme`s primary structure. c) alteri...
by samoyan
Sat Nov 03, 2007 2:25 pm
Forum: Molecular Biology
Topic: Difference: Hydrogen, Hydronium, Proton
Replies: 2
Views: 4280

Thank you very much!
by samoyan
Sat Nov 03, 2007 3:10 am
Forum: Molecular Biology
Topic: Difference: Hydrogen, Hydronium, Proton
Replies: 2
Views: 4280

Difference: Hydrogen, Hydronium, Proton

I`m a little bit confused about "H+" notation. Why many books write H+ instead of hydronium H3O+? I know that H+ cannot exist by itself, it definitely bonds with another water molecule to form hydronium. Here is an extract from Harper`s Biochemistry book: "Protons exist in solution no...
by samoyan
Thu Nov 01, 2007 11:59 pm
Forum: Molecular Biology
Topic: Glycolysis, Step 6
Replies: 7
Views: 10271

Great conclusion, thank you!
Currently, I`m learning chemical equilibrium and ionization concepts in college. So, it`s a good stimuli to learn both chemistry and biology simultaneously.
by samoyan
Thu Nov 01, 2007 5:44 pm
Forum: Molecular Biology
Topic: Glycolysis, Step 6
Replies: 7
Views: 10271

MrMistery wrote:Just to be 100% sure I looked it up in my trusty Lehninger. My assumption was indeed correct.
Do you mean this book? http://www.amazon.com/Lehninger-Princip ... 0716743396
by samoyan
Thu Nov 01, 2007 5:42 pm
Forum: Molecular Biology
Topic: Glycolysis, Step 6
Replies: 7
Views: 10271

Thank you very much for your response! I really appreciate it!!! I found an article on the net where there was a picture of phosphate ion with hydrogen atom attached, but I was still not sure about this. http://img240.imageshack.us/img240/7939/glycolysisstep6diagram2cp4.jpg http://img339.imageshack....
by samoyan
Thu Nov 01, 2007 5:11 pm
Forum: Molecular Biology
Topic: Glycolysis, Step 6
Replies: 7
Views: 10271

Glycolysis, Step 6

Hello, I have a question regarding Step 6 in glycolysis. It`s clear that in step 5, two molecules of G3P (glyceraldehide-3 phosphate) form. G3P has the following structural formula: http://img64.imageshack.us/img64/2215/glycolysisstep6yc3.jpg I`m confused with the formation of NADH + (H+) from NAD+....
by samoyan
Thu Nov 01, 2007 5:10 pm
Forum: General Discussion
Topic: Test Bank Biochemistry By Berg and Stryer
Replies: 10
Views: 9323

I`m going to buy this book this week.