ACS biochemistry

pKa (chapter 3) correct answers measure of the tendency of a group to give up a proton (acidity); tendency decreases tenfold as pKa increases by one unit thioester bond (1) correct answers compounds with functional group C-S-CoA-C (eg, in acetyl-CoA) zwitterion (3) correct answers dipolar ion ...

Metabolism (catabolism and anabolism) correct answers Metabolism: sum of total chemical reactions in an organism, also the method by which cells extract and use energy from their environment. Catabolism: The process by which stored nutrients and ingested foods are converted to a usable form of e...

Describe the structural changes in hemoglobin that allow for cooperative binding of O2 correct answers Binding of O2 in one subunit causes a conformational change in an adjacent subunit allowing O2 to bind Which amino acids in "a" would be charged at pH 7? correct answers Asp, Glu, Arg, His, Ly...

Each of the following subcellular structures contains DNA EXCEPT A. the nucleus. B. ribosomes. C. chloroplasts. D. mitochondria. correct answers B In plant and animal cells, the three-dimensional integrity of the cell is maintained, in part, by an internal network of filaments called ...

Buffer Order and Henderson Hasselbach correct answers Water, Buffer, Salt, Base pH = pKa + log(A/HA) pKa decrease as temp increase so pH decrease Ramachandran plots correct answers Φ = N-R ψ = C-R optimal angle to prevent steric hinderance Protein structure of a helix, B sheet, reverse t...

What amino acids have nonpolar, aliphatic R groups? correct answers Glycine, Alanine, Proline, Valine, Leucine, Isoleucine, Methionine What amino acids have polar, uncharged R groups? correct answers Serine, Threonine, Cysteine, Asparagine, and Glutamine What amino acids have aromatic R groups...

1. A weak acid, HA, has a pKa of 4.11. a) At pH 7.11, what will the ratio of conjugate base to acid be? (Henderson-Hasselbach equation: pH=pKa + log [A-]/[HA]) b) Based on answer to "a," is there more HA or A- at that pH? c) At pH 2.11, what will the ratio of conjugate base to acid be? d) Bas...

nucleotides correct answers monomeric unit for nucleic acids and are composed of nitrogenous base, 5-carbon sugar and a phosphate nucleic acids are biopolymers of correct answers nucleotide monomers DNA correct answers -more stable - carrier of genetic information - double stranded RNA co...

random movement of molecules is impacted by... correct answers 1. size 2. charge 3. temperature 4. crowding 5. barriers what can cross the membrane correct answers 1. hydrophobic molecules (O2, CO2) 2. small uncharged polar (H2O, glycerol) characteristics unique to carriers correct ans...