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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...

BCH 369 EXAM 4 QUESTIONS WITH REVISED ANSWERS The commercial herbicide Roundup inhibits chorismate synthesis in plants. Chorismate is the precursor for the biosynthesis of aromatic amino acids. Which amino acids would likely become essential for weeds growing in crop-fields being sprayed with Roundup ("Roundup ready")? A) Phe, Pro, Thr B) Phe, Tyr, Trp C) Tyr, Trp, Thr D) Pro, Tyr, Phe E) Pro, Tyr, Trp - Answer-B) Phe, Tyr, Trp What is the product of the following transaminase reaction: a...

BCH 369 CHAPTER 7 TEST QUESTIONS WITH ANSWERS ALL REVISED AND UPDATED Michaelis-Menten equation - Answer-A mathematical expression that describes the activity of an enzyme in terms of the substrate concentration ([S]), the enzyme's maximal velocity (Vmax), and its michaelis constant (Km): Vo = Vmax [S]/(Km + [S]). catalytic constant (Kcat) - Answer-The ratio of the maximal velocity (Vmax) of an enzyme-catalyzed reaction to the enzyme concentration. Also called a turnover number. Turnover...

BCH 369 TEST 3 QUESTIONS WITH ALL ANSWERS CERTIFIED Two species of bacteria have been isolated, one from a hot spring (average temperature 50°C) and another from a glacial lake (average temperature 4°C). Which of the following statements about the membrane composition of the "hot" and "cold" species is most likely CORRECT? A) Lipids from "hot" membranes contain a greater proportion of longer-chain fatty acids than lipids from "cold" membranes. B) Lipids from "hot" membranes conta...

BCH403 FINAL EXAM QUESTIONS WITH REVISED ANSWERS – UPDATED!! translation. - Answer-Release factors Argonaute: - Answer-Selects which strand of miRNA will be used to target mRNA When run on an agarose gel, DNA will migrate through the gel: - Answer-Naturally because DNA is already overwhelmingly negative A technique commonly used to separate proteins based solely on length is called: - Answer-SDS-Polyacrylamide gel electrophoresis (SDS-PAGE) Alternative splicing: - Answer-requires...

BCH403 PRACTICE TEST QUESTIONS WITH CERTIFIED ANSWERS E6: Which one of the following mRNA sequences contain an arginine residue as the 4th amino acid in reading frame 3? A codon table is located on the last page of this exam booklet. - Answer-5' UUUGACCGACCAGAACCC 3' E6: Which one of the following is not involved in translation initiation prokaryotes? - Answer-Methionyl-tRNA E6: Which of the following post-translational modifications is most common in humans? - Answer-Phosphorylation ...

BCH 403 FINAL TEST QUESTIONS WITH VERIFIED ANSWERS Which one of the following proteins catalyzes the 5' --> 5' bond when adding the 5' cap to mRNA - Answer-RNA guanylyltransferase which one of the following mRNA sequences contain an arginine residue as the 4th amino acid in the reading frame 3? A codon table is located on the last page of this exam booklet - Answer-5' UUUGACCGACCAGAACCC 3' Which one of the following is not involved in translation initiation in prokaryotes? - Ans...

BCH 403 – CUMULATIVE TEST QUESTIONS WITH ALL CORRECT ANSWERS During translocation, the ribosome is moved towards the 3' end of the mRNA. In eukaryotes, this requires: A. eEF1α. B. eEF1βγ. C. eEF2. D. EF-G. E. EF-Ts - Answer-C. eEF2 Peptidyltransferase: A. requires GTP as an energy source. B. is found on the large ribosomal subunit in both prokaryotes and eukaryotes. C. is found within the protein components of the ribosome. D. acts between the P- and E-sites of the ribosome. ...