Which of the following molecules' production is likely to be subject to feedback inhibition in a bacterial cell? All the other answers are correct all of the above) The amino acid Tryptophan Purine nucleosides Pyruvate
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- In serine protease catalytic triad mechanism, the first and second products that leaves the active site are Carboxylic acid and amide respectively Amide and carboxylic acid respectively Ester and amide respectively Carboxylic acid and ester respectivelyerioiogy e cell walls of Gram-positive and Gram-negative bacteria are structurally different but both contain peptidoglycan. Which TWO of the following statements about peptidoglycan biosynthesis are CORRECT? O Peptidoglycans are made from alternating units of N-acetylmuramic acid and N-acetylglucosamine. O N-acetylglucosamine is synthesised from N-acetylmuramic acid by the addition of acetic acid derived from phosphoenolpyruvate. O Peptidoglycan synthesis in Gram-positive bacteria involves the addition of the amino acids, L-alanine, D-glutamic acid, L-lysine, to N-acetylmuramic acid. O D-glutamic acid-D-glutamic acid dipeptide is linked to the tripeptide side chain of N-acetylmuramic acid to form N-acetylmuramic acid-pentapeptide O At the beginning of the biosynthesis pathway, the N-acetylglucosamine-N-acetylmuramic acid-pentapeptide-phospholipid crosses the cell membrane and is added to growing peptidoglycan chain. O The transglycosylase enzyme is located on the inner face of the…When lactose is added to growing culture of E. coli, the cells begin to make enzymes necessary for lactose utilization. In contrast, when tryptophan is added to the culture medium, synthesis of the enzymes for tryptophan pathway ceases. Contrast the two systems explaining why they act in reverse directions
- Polyethylene glycol (PEG)-conjugated IFNs have superior pharmaceutical properties compared with their unconjugated counterparts as a result of greater protection against proteolytic degradation, better solubility, and slower catabolism and excretion. Group of answer choices True FalseThe main reason why ruminants like cows can metabolize grass is the presence of bacteria that produce which enzyme in their gut? O glucosidase lactase O cellulase amylaseA group of students have carried out an experiment to investigate the relationship between the amount of growth hormone BAP in the culture medium and the growth of shoot of jckplant.They have supplemented the medium with BAP but there is another student suggested that hundred percent shooting efficiency will be obtained when the the culture media is suplemented BAP and NAA.From your point of view, state which option will you choose and explain why?
- Which classes of molecules are also directly produced from TCA cycle intermediates? O DNA Steroids Porphyrins O ProteinsCellobiose is identical with maltose except that the former has a β-1, 4-glycosidic linkage True FalsePlasmodium use digestive vacuoles (DV) to digest hemoglobin and heme from red blood cells into fuel sources for their life cycle. The DV is the site where host proteins are degraded by the parasite and then the peptide pieces are exported into the Plasmodium cytosol for use in biosynthesis. Plasmodium falciparum chloroquine resistance transporter, PfCRT, is a transporter in this DV membrane and its original function was unknown until recently. Researchers digested hemoglobin into peptide fragments and then tested the effect of these fragments on PfCRT function. VF-6-2 is one of these fragments of hemoglobin and apparently a natural substrate of PfCRT. Chloroquine, for which the transporter was originally named, is a substrate only of mutant transporters. One mutant PfCRT, for instance, has K76T in its substrate binding site and thus a significantly lower Km for chloroquine, inspiring the original name of the transporter, because of its importance for drug resistance in malaria…
- Which of the following is responsible for transferring iron into the cell? Transferrin receptor LDL receptor ESCRT Mannose-6-Phosphate receptorIf there was India Ink added to a culture of Paramecium caudatum, it would increase the average number of food vacuoles because India ink contains no sugar or nutrients and the formation of food vacuoles would be the first stage in the metabolic process when digesting nutrient-rich particles. If Sugars (sucrose or mannitol) were added to this culture to modify extracellular solute concentration, what effect would we see in the microscopic in regards to the number of food vacuoles? Could sugars have other effects beyond altering solute concentration? Be metabolized?If there was India Ink added to a culture of Paramecium caudatum, it would increase the average number of food vacuoles because India ink contains no sugar or nutrients and the formation of food vacuoles would be the first stage in the metabolic process when digesting nutrient-rich particles. If Sugars (sucrose or mannitol) were added to this culture to modify extracellular solute concentration, what effect would we see in the microscopic in regards to the number of food vacuoles and will the amount of food vacuoles change over time? Could sugars have other effects beyond altering solute concentration? Be metabolized?