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What is an Amino acid
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protein/polypeptide
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Stack #23559

QuestionAnswer
What is an Amino acid compound that contains an amino group and carboxylic group
protein/polypeptide polymer of amino acids
Amino acids to protien / polypeptide condensation, peptide bond
Exergonic G negative, spontaneous
Endergonic G positive, nonspontaneous
How can non - spontaneous rxn still occur Cells couple nonfavorable metabolic processes to favorable ones so that the net change in free energy is negative
Why is water molecule polar uneven distribution of charge, O neg, H positive
How many hydrogen bonds can water form Can form 4, since it has 2 hydrogen atoms to donate to H-bond, and 2 pairs of electrons to accept
Relative strengths of bonds in biomolecules covalent>ionic>hydrogen>vanderwalls
Vander walls interaction between 2 polar molecules dipole -- dipole interaction
Vander walls interaction b/ween 2 nonpolar molecules london dispersion forces
hydrophobic water fearing, compound that lacks polar groups and is insoluble
What happens to entropy when hydrophobic molecule is dissolved Entropy decrease, because water molecule not free to form H bonding
How can hydrphobic molecules increase entropy aggregate
Hydrophobic effect Water molecules repelled from nonpolar molecule form shell
amphipathic molecule w/ both polar and non-polar regions
What happens when amphipathic molecules are added to water polar molecules orient themselve toward water, and nonpolar aggregates due to hydrophobic effect
What are the concentration of H and OH in pure water 1 x 10 ^ -7 M
What is the relationsip b/ween Ka and pKa larger Ka, or lower pKa = stronger acids
Buffer system of weak acids and its conjugate base, resist changes in pH
What happens at midpoint of titration pH = pKa and [acid] = [conj.base]
how do you make a good buffer pH needs to be w/in 1pH unit of pKa
physiological pH of human body 6.9 - 7.4
Enzyme for H2CO3 buffer carbonic anhydrase
Why are ATP bonds called high energy bonds cleavage of the bond has a large negative free energy
Why cleavage of ATP bonds release eneryg ATP hydrolisis products are more stable
the joining of Ala - Tyr is a amide bond
under normal physiological conditions the N term of plypeptide chain looks like what NH3+
whe pH > pKa what form is dominate conj base, NH2 COO-
When pH < pKa what form is dominate Acid, NH3+, COOH
Created by: treater
 

 



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