Bch4024 Study guides, Class notes & Summaries

BCH4024 Exam 1 Purich Questions & Answers 2023/2024 Basic Structure of water - ANSWER--large dipole moment -very polar that interactions between H2O molecules are strong--high heat capacity -liquid water=H-bonds are relentlessly made and broken; thus a flickering collection of W5 structures, with extremely little W1 -each water molecule can form up to 4 H-bonds -liquid water has 3.4 H-bonds on average -ice has 4 H-bonds H-bond - ANSWER-stable interaction occurring when 2 EN atoms shar...

BCH4024 EXAM 1 QUESTIONS WITH ALL ANSWERS REVISED Absence of Vitamin C leads to unstable collagen, ---------and the hydroxyproline stabilizes the collagen - Answer-scurvy AT temperature of -------celsius, collagen with just proline will break down but will break down at -------celsius if it has hydroxyproline - Answer-24, 58 The main driving force of protein folding is ----------- interaction - Answer-hydrophobic ------------are made of alpha and beta tubulin which requires other prote...

BCH4024 EXAM 1 QUESTIONS WITH CERTIFIED ANSWERS Transfer RNA (tRNA) secondary structure: - Answer-tRNA "reads" genes information encoded in mRNA (3 nucleotide codon) copied from DNA What does tRNA transfer during protein synthesis - Answer-the appropriate amino acid to a growing polypeptide chain Transcription creates a: - Answer-complementary RNA copy (mRNA) of a sequence of DNA Translation steps: - Answer-mRNA decoded by ribosomes and tRNA is used to produce a specific amino acid ...

BCH4024 TEST 1 QUESTIONS WITH COMPLETE SOLUTIONS diffusion-limited process: - Answer-reaction rate is determined by how fast reactants collide the Protonation and deprotonation of macromolecules? - Answer-acid/base groups on surface react immediately acid/base groups deep inside may never ionize hydrogen bonds of buried helices and beta-sheets require the "conformation breathing" -local unfolding Pepsin - Answer-a digestive enzyme secreted into gastric juice, having a pH of 1.5 a...

BCH4024 EXAM 4 (DNA REPLICATION, TRANSCRIPTION, TRANSLATION, DNA DAMAGE AND REPAIR, CANCER) SCORED A+

QUESTIONS AND ANSWERS

QUESTIONS AND ANSWERS

BCH4024 EXAM 1 QUESTIONS WITH ALL ANSWERS REVISED At equilibrium there is more ----------- than of d glucose and very little linear. Beta is more stable - Answer-beta, alpha You have the standard, beta d glucose, but there are derivative like (with charge) and both of which are beta and d series - Answer-gluconate, gluconolactone - is a combination of alpha and beta glucose that produces a 1,4 linkage - Answer- Maltose Sucrose is a sugar because its glucose and fructose reducing e...

BCH4024 EXAM 1 QUESTIONS WITH CERTIFIED ANSWERS What properties of β-strands forms beta sheets - Answer-hydrogen bond Where is the hydrogen bonds in a β-sheet? - Answer-between the backbone of C=O of one chain and the N-H of another chain segment Where is the hydrogen bonds in a α-helix? - Answer-all hydrogen bonds involve the same element of polypeptide chain Where are the R-groups of neighboring residues in a β-strand? - Answer-opposite directions The peptide bonds of adjacent res...

BCH4024 TEST 1 QUESTIONS WITH COMPLETE SOLUTIONS Isoelectric Point of Amino Acids - Answer-At the isoelectric point (pI = pH), average charge equals 0 The Henderson-Hasselbalch Eqn. can be applied at pI for both equilibrium dissociations. Two dissociation reactions involve the net zero charge species HAH+ <--> HA + H+ HA <--> A- + H+ (Isoelectric Point of Amino Acids) Two Henderson-Hasselbalch equations can be summed to solve for pI. - Answer-2pI=pKa1+ pKa2 +log [HA] +log...