In Gram-positive bacteria, peptidoglycan cross-link is formed by a peptide bond from the amino group of diaminopimelic acid. DAP forms together with N-acetylglucosamine and Nacetylmuramic acid to form glycan tetrapeptide The first statement is true. The second statement is false. The first statement is false. The second statement is true. Both statements are true. Both statements are false.

In Gram-positive bacteria, peptidoglycan cross-link is formed by a peptide bond from the amino group of diaminopimelic acid. DAP forms together with N-acetylglucosamine and Nacetylmuramic acid to form glycan tetrapeptide The first statement is true. The second statement is false. The first statement is false. The second statement is true. Both statements are true. Both statements are false.

Curren'S Math For Meds: Dosages & Sol

11th Edition

ISBN:9781305143531

Author:CURREN

Publisher:CURREN

Chapter10: Reconstitution Of Powdered Drugs

Section: Chapter Questions

Problem 5.5P

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Penicillin,an antibiotic inhibits the formation of cross links between sugar groups in peptidoglycan.Bacteria treated with penicillin should be:
The alkaline hydrolysis of pAUGCAGC oligonucleotide produces: O A. Uridine 2'-monophosphate, uridine 3'-monophosphate, cytosine 2'-monophosphate O B. Adenosine 2'-monophosphate, adenosine 3'-monophosphate, adenosine 21,5'-bisphosphate OC. Guanosine 2'-monophosphate, guanosine 3'-monophosphate, cytosine 3'-monophosphate O D. Cytidine 3'-monophosphate, guanosine 2'-monophosphate, adenine 2'-monophosphate O E. Adenine 3,5'-bisphosphate, guanine 2,5'-bisphosphate, uridine 2'-monophosphate O F. Uridine 2'-monophosphate, uridine 3'-monophosphate, guanine 3'-monophosphate
A toxin is glycopeptide, X that is composed of an octapeptide and a saccharide Y. Glycopeptide X is composed of a glycan Y and an octapeptide. The octapeptide was cleaved by trypsin, giving 2 tetrapeptides of exactly the same composition except for its N-terminals. When the octapeptide was cleaved by chymotrypsin, it gave a pentapeptide and a tripeptide. DNFB treatment gave DNP-ser. The composition of the octapeptide is lys, ser, trp.and leu. The leu:ser ratio is 4:1. 1. What is the sequence of this octapeptide? Saccharide Y is a tetrasaccharide. To determine its linkages, a person methylated glycopeptide X effectively methylating saccharide Y. Cleavage gave the peptide and the following products: 2,3,4-tri-O-methyl-a-D-glucopyranoside acid, 2,3-di-O-methyl-ß-D- glucopyranoside, 1,3,4-tri-O- methyl-ß-D-glucuronic acid treatments to the isolated tetrasaccharide gave the following results: and 1,4,6-tri-O-methyl-ß-D-N- acetylgalactosamine. Further 1. A. Treatment of saccharide Y with an…
Penicillin is an antibiotic. It kills bacteria by preventing the formation of the peptidoglycan layer of the bacterial cell wall. Penicillin does so by inhibiting the enzyme Transpeptidase, which is required for peptidoglycan layer formation. What type of inhibitor is Penicillin? Explain.
Peptidoglycan (PG) is a heteropolymer that consists of glycan strands cross-linked by short peptide fragments and makes up the cell wall of archae . True False
Match the antibiotic to its target with bacteria. erythromycin [ Choose ] [Choose ] streptomycin, an aminoglycoside bacterial enzymes involved in folic acid synthesis Bacterial gyrase tetracycline bacterial transpeptidase 70S ribosomes Bacterial RNA polymerase ampicillin Bactrim= trimethoprim + sulfa drug [ Choose ] rifampin [Choose ] ciprofloxacin, a fluoroquinolone [ Choose ] >
Bacteria can make polyribosomes (polysomes) which help them produce a large amount of proteins quickly. True or false?
You need to resuspend lyophilized protein in a solution of 5mM HEPES with 20% glycerol. Describe how you would make 1mL of this solution. HINT: you can make a greater volume of 5mM HEPES.
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All bacteria can synthesize the 21 amino acids. true False
Many antibiotics alter the rate of reaction for enzymes that produce and then cross-link the strands of this polymer together. The image below shows the structure of one antibiotic called penicillin as compared to the portion of the peptidoglycan that undergoes cross linkage. Condon A HS. CH CH CH N-CH cooo Cand cooo wDAla-D-Ala [S] 2. Using the graph above, which condition do you predict was the penicillin condition? 3. Explain how penicillin effects the enzyme. 4. Why it is important to take the full dosage of antibiotics. Briefly explain 5. Is peptidoglycan still being produced in the portion of the graph marked by the circle in condition B?