Best Study Guide Exams Questions and Answers

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...

BCH 361 TESTED QUESTIONS WITH REVISED ANSWERS What enzyme is activated by direct association with an active G protein? - Answer-*A) adenylate cyclase* C) protein kinase A B) cAMP phosphodiesterase D) protein kinase G Activity of the Ras protein is analogous to the in terms of its ability to bind GTP. - Answer-*A) G protein α subunit* C) G protein γ subunit B) G protein β subunit D) calmodulin Which of the following metabolic pathways is carried out only in the liver? - Answer-A) ...

BCH 361 Ch. 7 TEST QUESTIONS WITH CORRECT ANSWERS Match the condition w/ the statement that describe it. This condition will result in the highest rate. A. [S]= 10Km B. [S]= Km C. [S]= 0.1Km - Answer-A Match the condition w/ the statement that describe it. Doubling [S] will have little effect on the rate. A. [S]= 10Km B. [S]= Km C. [S]= 0.1Km - Answer-A Match the condition w/ the statement that describe it. About 90% of the active sites are occupies by substrate A. [S]= 10Km B. [...

BCH 361 Ch. 6 TEST QUESTIONS WITH ANSWERS – UPDATED!! What other aspects of a catalyzed rxn are diff from the uncatalyzed rxn? A. the overall rxn B. the mechanism C. delta H rxn - Answer-B Is this statement true for biochemical standard state, the chemical standard state, or both? ∆G° - Answer-the chemical standard state Is this statement true for biochemical standard state, chemical standard state, or both? the pressure is 1 atm - Answer-both Is this statement true for bioche...

BCH 361 CHAPTER 18 TEST QUESTIONS WITH ALL CORRECT ANSWERS Beriberi involves a reduction in the activity of pyruvate dehydrogenase complex. Which enzyme(s) in the complex is/are specifically affected in this disease through loss or reduction of a prosthetic group? - pyruvate dehydrogenase component (E1) When pyruvate initially binds to the pyruvate dehydrogenase complex, which of the following statements is TRUE? - The cofactor of E3 is in its reduced form Which of the following is NOT a co...

BCH 361 CH 2 EXAM QUESTIONS WITH ALL CORRECT ANSWERS The van der Waals contact distance between two participating atoms is usually in the range of angstroms. a) 0.5 to 0.8 b) 2 to 5 a) 1 to 3 d) 4 to 6 e) 3 to 4 - Answer-e In an electrostatic interaction, the strength of the bond is: a) proportional to the charges on the two interacting atoms. b) proportional to the dielectric constant of the medium. c) inversely proportional to the distance between the two atoms. d) Both the first ...

BCH 361 ICLICKER QUESTIONS WITH REVISED AND UPDATED ANSWERS A bacterium was found to have a defective DNAligase. Which aspect of DNA replication would bemost affected by this? A. Synthesis of leading strand B. Synthesis of lagging strand C. Both strands would be affected equally D. It has no affect on DNA replication. - Answer-B. Synthesis of lagging strand Which of the following should be the sequence of the template strand DNA if a mRNA with the sequence 5'-UGCAGUA-3' is needed?...

BCH 361 CH 1 EXAM QUESTIONS WITH ALL CORRECT ANSWERS Which of the following would NOT be part of a complex carrying out the process of translation? a) amino acids b) mRNA c) DNA d) ribosome - Answer-c What is the main difference between a prokaryotic cell and a eukaryotic cell? a) Prokaryotic cells do not contain membranes. b) Eukaryotic cells have a periplasmic space. c) Eukaryotic cells have membrane-enclosed compartments. d) Prokaryotic cells do not contain DNA. - Answer-...

BCH 361 EXAM 2 QUESTIONS WITH ALL VERIFIED ANSWERS The DNA in each human cell if connected and fully extended will be meters long. - Answer-2 Supercoiling accounts for some of the compaction of the DNA, but further compaction occurs by to the DNA. - Answer-binding certain proteins chromatin - Answer-is the entire complement of a cell's DNA and its associated proteins. histones - Answer-are highly basic proteins that are components of chromatin. Histones (an octamer that contains two...

BCH 369 EXAM 3 QUESTIONS WITH ALL REVISED ANSWERS Which of the following is(are) used to determine to which family a virus is categorized? - Answer-Viruses can be categorized by: whether its genome is composed of single-stranded DNA. whether its genome is composed of double-stranded DNA. whether it has a membrane envelope. whether its genome is composed of single-stranded RNA. Suppose you want to design a drug to fight a virus. Which of the following would be good choices? (Select all...