Table I. Sakaguchi Reaction Samples 1. Arginine 2. Casein Observation 3. Albumin 4. Gelatin 5. Peptone 6. distilled water
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- For the next 7 items, refer to the figure below: 3 4 5 9 Tyr - Ile - Gln - Asn Cyst Pro Leu Gly - NH: Oxytocin (Human) Cyst S 2 3 7 9. 5 6. Cyst - Tyr - Phe - Gln Asn Cyst Pro - Arg - Gly - NH: 4 8 Arginine Vasopressin (Human) _4. These molecules are: A. proteins B. nonapeptide C. polypeptide D. aminopeptide 5. What is the classification of these molecules based on function? A. Structural proteins B. antibody What is the classification of these molecules based on composition? A. pure C. hormones D. enzyme 6. C. conjugated D. compound B. simple _7. What is the classification of these molecules based on composition?Explain why a tuberculin skin test on an AIDS (acquired immunodeficiencysyndrome) patient with tuberculosis may show a negative result.Describe the cross - section side view of a Gram - negative cell . Clearly state where the following would be located or write the letters in order of appearance from the outside to the inside . If any of these structures are not present , make sure to leave them out . A ) peptidoglycan ; ( B ) periplasm ; ( C ) porin ; ( D ) LPS ; ( E ) teichoic acids ; ( F ) plasma membrane : ( G ) outer membrane : ( H ) nucleoid
- Silver nitrate is sometimes put into the eyes of newborn infants as a preventive measure against gonorrhea. Silver is a heavy metal. Explain how this treatment may work against bacteriaGram negative bacteria posseses a lipopolysaccharide (LPS) layer. how does this structural feature interact with human immune system?Is this the correct answer? pls explain why 1. Glucose : Moves into the Sac 2. NaCl : Moves into the sac 3. water : Moves into the sac 4. albumin : doesn't move
- Several pathogenic bacteria (e.g., Bacillus anthracis, the cause of anthrax) produce an outermost mucoid layer called a capsule. Capsules can be composed of polysaccharide or protein. What effect do you think this “coat” would have on a bacterium’s interactions with a host animal’s immune system?Gram-negative bacteria are generally more resistant to antibiotics than Gram-positive bacteria. What structure in Gram-negative bacteria (but not Gram-positive bacteria) is the basis of this difference?3. The table on the last page compares for each of four different proteolytic enzymes the chemical bonding structure of a classical substrate with the structures of two competitive inhibitors. For each substrate structure an arrow indicates the position of the scissile bond, i.e., the bond that is cleaved through catalytic action. For each enzyme, one of the inhibitors is a classical competitive inhibitor while the other is a transition-state inhibitor analog. While ordinary competitive inhibitors are associated with (dissociation) inhibitor equilibrium con- stants of ~10-3 to 10-6 M, transition-state analogs exhibit inhibitor constants ≤ 10-⁹ M. (a) For each enzyme draw a circle around those parts of the substrate that account for specificity of substrate recognition. (b) For each enzyme identify the transition-state inhibitor analog by drawing a circle around it and give a brief explanation of why it mimics the structure of the transition-state species. (c) Draw a "generic"…
- Certian bacterial species have outer layers composed of polymers made of D-amino acids. Immune system cells whose task is to attack and destroy foerign cells, cannot destroy these bacteria. Suggest a reason for the phenomenon.Several pathogenic bacteria (e.g., Bacillus anthracis, the causeof anthrax) produce an outermost mucoid layer called a capsule. Capsules may be composed of polysaccharide or protein.What effect do you think this “coat” would have on a bacterium’s interactions with a host animal’s immune system?A new drug has been identified that inhibits Synthesis of LPS. Your boss had told you to do a gram stain on a patient sample to see if it would be useful. Describe the major steps in the gram stain you would use. If this organism were a susceptible coccus what would the appearance be if you did your gram stain correctly. Discuss which part of the LPS would be the best to target with a drug like this and why you chose that- the lipid A, the core carbohydrates or the O antigen part.