trp Operon

trp Operon

Example of Gene Regulation at steps after Transcription initiation. Where translation is coupled with transcription to achieve regulation of an operon through secondary RNA structure. To which process the figure given below is related? trp Operon is a Repressible Operon —trp operon, just like many other operons for amino acid biosynthesis, responds to the cellular …

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Phylum Echinodermata : General Characteristics

Phylum Echinodermata : General Characteristics

The term Echinodermata (Gr., echinos= spiny, derma=skin), was coined by Jacob Klein Echinoderms are triploblastic, radially symmetrical (adult) often pentamerous, larva with bilateral symmetry, sessile or creeping at bottoms. Echinoderms are exclusively marine deuterostomes. All echinoderms are benthic ; bottom dwellers (except few pelagic sea cucumbers), mostly free living except sea lilies. Spiny skinned; enterocoelic …

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Phylum Mollusca : General Characteristics and Classification

Phylum Mollusca : General Characteristics and Classification

Phylum Mollusca : General Characteristics and Classification (L., mollis=soft) Second largest phylum in number ; first being arthropoda Malacology : Study of Mollusca Conchology : Study of shell of Mollusca Most molluscs are marine, some freshwater, some terrestrial. Most molluscs are herbivorous but some (e.g. squid) are active predators. Triploblastic, soft-bodied animals with bilateral symmetry …

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CONNECTING LINKS OF BIOLOGICAL WORLD

CONNECTING LINKS OF BIOLOGICAL WORLD

CONNECTING LINKS OF BIOLOGICAL WORLD Actinomycetes Bacteria and Fungi Ainktozoan Protochordates and Vertebrata Archaeopteryx (bird) Birds and Reptiles Balanoglossus (hemichordate) Echinoderms and Chordates Chimaera (Rat or Rabbit fish) Bony and cartilaginous fishes Coelocanthus Fish and Land vertebrates Ctenophora Coelenterates and Platyhelminthes Club moss Bryophytes and Pteridophytes Cycas Pteridophytes and Gymnosperm Duck billed platypus, Spiny ant …

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CLASSIFICATION OF RHABDOVIRIDAE

CLASSIFICATION OF RHABDOVIRIDAE

  Rhabdos (greek) = rod    Mononegavirales order negative, ss, monopartite RNA (11.9 kb) viruses. capsid is roughly bullet shaped and about 75 nm wide and 180 nm long. enveloped viruses with large protein projections Group V: (-)sense RNA Viruses Order Mononegavirales Family Genus Type Species Hosts Rhabdoviridae Vesiculovirus Vesicular stomatitis Indiana virus Vertebrates Lyssavirus (Greek, …

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Phylum Arthropoda : General Characteristics and Classification

Phylum Arthropoda : General Characteristics and Classification

Gr. Arthos : Jointed         podos: legs Animals with jointed legs Largest phylum in Animal kingdom in both number of taxa and biomass Most successful group of  animals due to chitinous skeleton. Bilaterally symmetrical, triploblastic, metamerically segmented and tagmatization Segments are not separated as in annelids; external segmentation is present. Organ system level …

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Wound Infection

Infection of soft tissues associated with pus formation Pus consists PMNs, bacteria, fibrin and other body fluids May be endogenous or exogenous Endogenous: source of infection commensal flora, for example, abdominal surgical wound infection from normal flora of bowel Exogenous:  source of infection outside the body, for example burn infection Possible pathogens most commonly isolated …

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Antimicrobial Resistance and its Mechanism

Antimicrobial Resistance and its Mechanism

Bacterial resistance to drugs is a condition in which the bacteria that were earlier susceptible to antibiotics develop resistance against the same antibiotics and are not susceptible to the action of these antibiotics. Antibiotic resistance is seen more commonly in hospital acquired infections than in community-acquired infections due to widespread use of antibiotics in hospitals …

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