Which enzymes do penicillins inhibit?
Transpeptidases
b-lactamases
Dihydropteroate synthetase
D-Alanine synthetase
Transpeptidase is the answer as
Penicillin irreversibly inhibits the enzyme transpeptidase by reacting with a serine residue in the transpeptidase
Which enzymes do penicillins inhibit? Transpeptidases b-lactamases Dihydropteroate synthetase D-Alanine synthetase
Which of the following ismismatched concerning antimicrobials? A. Inhibit cross-linking of peptidoglycan:: Penicillins, Cephalosporins, Carbapenen B. Analogs of essential metabolites:: Sulfonamides, Trimethoprim C. Treatment of TB:: INH + Rifampin + Pyrazinamide + Ethanbutol D. Antivirals:: Aminoglycosides, Macrolides E. Inhibit membrane function:: Polyenes, Imidazoles, Polymyxin, Colistin
Which of the following amino acids is NOT an inhibitor of glutamine synthetase? O Glycine Alanine O Proline O Serine
explain how an alanine tRNA synthetase might prevent the incorrect addition of the similar amino acids glycine and valine to its target tRNA aline could fit in the activation site. - A. B. Alanine could fit in the activation site. - A. B. Glycine could fit in the activation site. - A. B. Valine could fit in the editing...
when designing a drug to inhibit the formation of a product, which requires several enzymes in a metabolic pathway, what should be the first piece of information a biochemist needs in order to develop the drugs
Answer the following two questions. Statins, such as lovastatin. competitively inhibit one of the enzymes of cholesterol synthesis. The structure of lovastatin is given below. Which enzyme does it inhibit? smallcircle HMG-CoA synthase smallcircle HMG-CoA reductase smallcircle pyrophosphomevalonate decarboxylase smallcircle squalene synthase
Which enzymes require thiamine as a co-factor A. Isocitrate dehydrogenase and citrate synthase B. Malate dehydrogenase and alpha-ketoglutarate dehydrogenase C. Pyruvate dehydrogenase and isocitrate dehydrogenase D. Pyruvate dehydrogenase and succinyl-CoA synthetase E. Succinate dehydrogenase and pyruvate dehydrogenase
Question 29 A deficiency in which of the following enzymes will not result in an increase in orotic acid? N-acetylglutamate synthetase Omilthine transcarbamoylase Argininosuccinate synthetase Argininosuccinate lyase Movavo to another question will save this response wyerere to each O B 2 0 a
12. Which enzyme catalyzes the reaction shown? Oo 9% a. succinyl-CoA synthetase b. succinate dehydrogenase c. pyruvate dehydrogenase d、a-ketoglutarate dehydrogenase 13. Which of the reactions of the citric acid cycle requires FAD as a coenzyme? a. the conversion of isocitrate to a-ketoglutarate b. the conversion of citrate to isocitrate c. the conversion of succinate to fumarate d. the conversion of malate to oxaloacetate 14. Another name for Complex I in the electron transport chain is a. cytochrome c oxidase. b....
Which of the following citric acid cycle enzymes lead to the formation of NADH and are regulatory enzymes? Isocitrate dehydrogenase Succinyl-CoA synthetase Succinate dehydrogenase Malate dehydrogenase • Citrate synthase
Enzymes. The enzyme tryptophan-tRNA synthetase binds to three different substrates, with the following Michaelis constants: ATP (KM = 50µM), tryptophan (KM = 0.5µM), and tRNATrp (KM = 1.5µM). - A) Which substrate binds to the enzyme with highest affinity? _________________________ - B) When is the enzyme mostly saturated (i.e., mostly bound to all three substrates)? [Circle one number (1 – 3).] 1) 1 µM ATP, 10 µM tryptophan, and 100 µM tRNATrp 2) 100 µM ATP, 1 µM tryptophan, and...