Larsen-Midterm_07_answered - 1. What is MicrobeWiki?...

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1. What is MicrobeWiki? Encyclopedia for microbes 2. SeqA, which plays a role in sequestering particular sites in DNA, was identified via a mutation that allowed: Mini chromosome from dam+ strain to replicate in a dam- strain ( 3-7 ) Match the following and their role in peptidoglycan synthesis: A. Bactoprenol (BP) is a lipoprotein responsible for flipping the peptidoglycan components acoss the cell membrane B. N-acetyl muramic acid (NAM) is a component of the glycan chain C. Uridine diphosphate (UDP) is a molecule that is a carrier for the glycan components within the cell before they are assembled D. Fructose-6-phosphate is a molecule from central metabolism that is a precursor to the glycan subunits E. Transpeptidase is an enzyme that catalyzes the peptide crosslinking 8 . Which of the following is NOT a feature of gram positive cells? Gram positives don’t have outer membrane 9 . While working in the lab, you mix lysozyme with Salmonella typhimurium (a rod- shaped gram negative microbe). Lysozyme can make cells lose their shape and lyse, or break down 10 . Polyhydroxyalcanoates (PHAs) are useful as which of the following: PHAs are useful for complex storage of carbons and for degrading plastics 11 . Which of the following is NOT true of Archaea? Archaea are NOT more closely related to bacteria than eukaryotes! 12 . For which intracellular molecule does the concentration vary the most depending upon the growth state of the cell? Ribosome concentration varies most depending upon growth state of the cell 13. Streptomyces species, which live in a complex environment (soil), produce antibiotics and form spores, are likely to have: Streptomyces which can make antibiotics and form spores has a large genome 14 . ___Vancomycin targets the peptidoglycan assembly 15 . ___Bacitracin targets the bactoprenol
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16 . ___Penicillin targets the transpeptidase 17 . ___Tetracycline targets the ribosome 18 . ___Chloramphenicol targets the ribosome 19. Which of the following cell components are commonly altered in particular ways (that we talked about in class) in psychrophiles and thermophiles that help these organisms survive at the temperatures at which they live? Psychrophiles and thermophiles have cells that are commonly altered to help them live at extreme temperatures. The cells altered are cell membrane and cell enzymes 20. Which of the following does NOT typically associate with the oriC region of the bacterial chromosome? DNA-ADP typically not associated with oriC region of bacterial chromosome 21 . Which of the following is NOT true of the lipopolysaccharide (LPS)? Lipopolysacharides (LPS) contain a lipid portion known as endotoxin, anchored to outer
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This note was uploaded on 04/08/2009 for the course BIMM bimm 120 taught by Professor Larsen during the Winter '07 term at UCSD.

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Larsen-Midterm_07_answered - 1. What is MicrobeWiki?...

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