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Biochem Exam 1
Biochemistry
| Question | Answer |
|---|---|
| Alanine | A |
| Cysteine | C |
| aspartic acid | D |
| phenylalanine | F |
| glycine | G |
| histidine | H |
| isoleucine | I |
| Lysine | K |
| Leucine | L |
| Methionine | M |
| Asparagine | N |
| Proline | P |
| Glutamine | Q |
| Arginine | R |
| Serine | S |
| Threonine | T |
| Valine | V |
| Tryptophan | W |
| Tyrosine | Y |
| Glutamine | Z |
| Hydrophobic Amino Acids | glycine (G), alanine (A), proline (P), valine (V), leucine (L), isoleucine (I), phenylalanine (F), tyrosine (Y), tryptophan (W), methionine (M) GAPVLIFYWM |
| Branched chain Amino Acids | valine (V), leucine (L), isoleucine (I) VLI |
| non polar & hydrophobic amino acids | glycine (G), alanine (A), proline (P), valine (V), leucine (L), isoleucine (I), phenylalanine (F), methionine (M) |
| polar, uncharged amino acids | serine (S), threonine (T), tyrosine (Y), tryptophan (W), asparagine (N), glutamine (Q) STYWNQ |
| polar, uncharged OH groups and phosphorylate | serine (S), threonine (T), tyrosine (Y) STY |
| n-side chain | glycosylation |
| negatively charged amino acids | aspartate (D), glutamate (E) DE |
| backbone of Amino acids | alpha carbon + amino group + carbonyl group |
| positively charged basic molecules: | arginine (R), lysine (K), histidine (H) RKH |
| 3 protein families | globular, fibrous, membrane spanning |
| in hemoglobin, iron can be | ferric (3+) or ferrous (2+) |
| heme binds oxygent | ferrous (2+) |
| primary hemoglobin in adults | HbA |
| fetal hemoglobin binds more readily to | carbon monoxide |
| if delta G is positive, amino acids remain | in hydrophobic side |
| if delta G is negative, amino acids migrate | into aqueous solution |
| What is the H+ concentration in a urine sample that has pH of 6 | 10^-6M |
| weak acids are | incompletely dissociated in solution |
| how many equivalents of base need to be added to an acid soution for the PH to equal the pKa | 0.5 |
| what is the best buffering range of the monoprotic acid MOPS, pka = 7.2 | pH 6.5-8.5 |
| due to the side group steric clash, almost all peptide bonds are | trans |
| which residues are most likely found in turns? | R, G, D |
| which residues are most likely to be found in DNA binding helixes? | K,R,Q |
| which residues are most likely to be found on the inside surface of a porin? | K,S,Q |
| Which amino acid is redox active? | C |
| which residues are most likely to be found on the inside surface of a protein? | M,L,F |
| changes in what level of structure are responsible for creating amyloid fibers? | secondary |
| what is a critical feature of the Michaelis-menten model of enzyme catalysis? | formation of an ES complex |
| at pH=8 mutation of histidine to which amino acid would be conservative? | N |
| In competitive inhibition, what does the inhibitor do? | it binds reversibly at the active site |
| in uncompetitive inhibition, what does the inhibitor do? | it binds only to the ES complex |
| in non competitive inhibition, what does the inhibitor do? | it lowers the characteristic V max of the enzyme |
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