The lipopolysaccharide of Gram-negative bacteria is composed of the following EXCEPT: Phospholipid Lipoteichoic acid Polysaccharide O-Polysaccharide
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The lipopolysaccharide of Gram-negative bacteria is composed of the following EXCEPT:
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Phospholipid |
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Lipoteichoic acid |
||
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Polysaccharide |
||
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O-Polysaccharide |
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- Put the following anions in order from most nucleophillic to least nucleophillic: Br- I- F- Cl-Describe three types of the amphipathic lipid aggregates that form in water.A trisaccharide was isolated from a new species of red algae. The sample was hydrolyzed and monosaccharide units were analyzed in different colorimetric tests. Based on the data below, what are the identity of monosaccharide A, B, and C? A= fructose, B=mannose, C=xylose A= xylose, B=mannose, C= fructose A = mannose, B= fructose, C=xylose A= xylose, B= fructose, C=galactose A=galactose, B= fructose, C=xylose A=xylose, B= fructose, C=mannose A= fructose, B= xylose, C=galactose A=galactose, B=xylose, C=fructose
- a) 1,3-Diisopropylurea is a relatively small, very hydrophobic molecule. Suppose that the [1.3- diisopropylurea] outside of a cell is 5*10-° M, and the [1,3-diisopropylurea] inside the cell is 2*10-5 M. If the diisopropylurea were to move out of the cell, what transport process would be used? Circle the correct answer from the list below. 9) - Active transport: receptor mediated endocytosis - Passive transport: simple diffusion %3D - Passive transport: osmosis - Active transport: protein pumps proog - Active transport: phagocytosis - Passive transport: facilitated diffusion - Active transport: pinocytosis b) In terms of rate of transport of a molecule across a membrane, what is the difference betwee passive and active transport? tassive tranport is the movement a concentration gradient ronm higher to lower concentr without the use QP huolecules down ene Active transport is the movement of molecules over a concentraleon gradient concentration with the we బూబ ర active transport is of…Identify the biomolecule represented by the following image. O=P-O. 5' Base ОН 4" 1' 3 2' ОН1) If the pH of the rain drops from 6 to 5 due to air pollution, the rain has become: a) two time more acidic b) four-time more acidic c) ten time more acidic d) one thousand times more acidic 2) which of combination of statement is correct ? the denaturation of protein 1- causes changes in tertiary structure 2- is always an irreversible process 3-has no influence on the solubility 4-occurs only by interaction with heavy metals 5-does not influence covalent bonds and hydrogen bonds select one: a) only 1 is correct b) only 1 and 2 are correct c) only 3 and 4 are correct d) only 3, 4 and 5 are correct e) only 1, 2 and 5 are correct
- Define the term hydrophilic?With regard to the tubes containing sucrose, how would you classify the situation in terms of solvent movement ? ( isotonic, hypotonic, or hypertonic)? Explain.Which of the following group of membrane lipids predominate in plant cells?a) Galactolipidsb) Sphingolipidsc) Glycerophospholipidsd) Archaebacterial ether lipids
- Which of the following is the correct glycosidic bond linkage of the disaccharide shown? β-(1→6) glycosidic bond α-(1→6) glycosidic bond α-(1→1) glycosidic bond β-(1→1) glycosidic bondWhich of the following is/are a nucleophile(s) at pH 12? O guanidinium Ohydroxyl O thiol O amine O Both b and cWhen phospholipids are carefully mixed with water they are observed to exhibit which of the following properties? a) Spontaneous organization into stable structures within the water environment, b) Orientation of the Phosphate parts of the molecule away from fatty acid (non-polar) environment of a bilayer, c) Hydrophilic orientation of the ionic section of the phospholipid molecules to the polar portions of the water molecules, d) All are true, e) None are true.