Define quorum sensing.
Important Questions on Biotechnology and Bioinformatics
Bacteria are grouped under four categories based on their shape. Study the given figure and identify A. B. C and D?
Bacterial leaf blight of rice is causes by a species of –
Antibiotics P1, P2 (cell wall synthesis inhibitors), and Q1, Q2 (protein synthesis inhibitors) are equally hydrophilic and moderately toxic to humans. Staphylococcus is known to develop resistance to all these antibiotics. An experimenter tested these antibiotics against a recent pathogenic strain of Bacillus. A high density of Bacillus culture was spread on a nutrient agar plate. Filter paper discs, each soaked in P1, P2, Q1 and Q2 individually (of same concentration), were placed on the bacterial lawn (purple background in the schematic). M is mock control without any antibiotic. Following an overnight incubation, a zone of inhibition is seen around each disc, except for M. Additionally, few individual colonies were observed in zone of inhibition for P2. Based on these observations select the correct statement(s).
