Quorum sensing - Study guides, Class notes & Summaries

quorum sensing • The ability of bacteria to sense the presence of other bacteria via secreted chemical signals. receptor protein • Membrane protein that triggers a change in cell activity after binding to a particular substance. signaling molecules • ligands, neurotransmitters, pheromones, hormones: bind to receptors intercellular communication • "between cells" intracellular communication • "within cells" small hydrophobic ligands • directly diffuse throug...

MCB 3020C Module 2 Exam Review Questions and Answers 2024. *Anything denoted in red are extra important takeaways 1. What is the function of the Z ring in binary fission? A. It forms a contractile ring at the septum => Made up of FtsZ (tubulin homologues) molecules important for bacterial septation B. It controls the replication of DNA => Replisome contains DNA replication machinery C. It separates the newly synthesized DNA molecules => ParA polymerizes/depolymerizes to attach t...

MCB 3020C Module 2 Exam Review Questions and Answers 2024. *Anything denoted in red are extra important takeaways 1. What is the function of the Z ring in binary fission? A. It forms a contractile ring at the septum => Made up of FtsZ (tubulin homologues) molecules important for bacterial septation B. It controls the replication of DNA => Replisome contains DNA replication machinery C. It separates the newly synthesized DNA molecules => ParA polymerizes/depolymerizes to attach t...

GMS 6121 Exam 3 Quizzes with 100% Correctly Solved Which of the following are NOT accurately described structural relationships of bacteria? a) gram positive: thick peptidoglycan and teichoic acid b) gram negative: outer membrane and LPS c) acid-fast: waxes and lipids d) wall-less: LOS and cholesterol Answer-d) wall-less do have cholesterol from the host but do not have LOS/LPS Why are gram negative bacteria resistant to bacitracin and vancomycin? a) porins b) they lack the targets for...

BIOL 220 EXAM 1 UTK ALREADY GRADED A+Which of the following is/are shared by all cells? a) Mitochondria b) Endoplasmic Reticulum c) Nucleus d) Cell Membrane d) Cell Membrane Which of the following best supports the endosymbiotic theory? a) Mitochondria synthesize ATP b) Chloroplasts and mitochondria both use host cell ATP synthases for energy generation c) Chloroplasts synthesize glucose d) Chloroplasts and mitochondria both maintain their own unique DNA d) Chloroplasts and mitochondria...

Vibrio cholerae correct answers Gram negative comma-shaped & flagellated rods. 2 chromosomes, pH sensitive, halophilic, oxidase +. 2-3d incubation; produces rice water stools with dehydration (sunken eyes and cool skin). Electrolyte imbalance leads to muscle cramps. CT is a complex A-B toxin; A subunit translocates to ADP ribosylate the Gs subunit. cAMP levels rise, leading to water loss. Quorum sensing influences expression of virulence. At low density LuxO-P activates sRNAs that target HapR, t...

What is the name of the space that houses the root of a tooth? - ANS alveolar bone proper What is the name of the depression in the interdental gingiva, located directly under tooth contacts? - ANS col most coronal edge of the free gingiva - ANS gingival margin sulcular epithelia is ___ and has a ___ boundary with underlying connective tissue - ANS nonkeratinized, smooth type of epithelial cell that does not have a nuclei, are closely packed together and provi...

AP Biology Practice Exam Questions and Answers yes - Correct Answer ️️ -is testosterone lipid soluble testosterone - Correct Answer ️️ -readily passes through the cell membrane and binds to a receptor in the cytoplasm. the hormone and receptor then enter the nucleus and act as a transcription factot voltage-gated calcium channels in the membrane open - Correct Answer ️️ -what is a direct result of depolarizing presynaptic membrane of an axon oxygen gas - Correct Answer ️️ ...

MCB 2004C Module-2-Practice-Exam-Answer-Key- University of Central Florida What is the function of the Z ring in binary fission? A. It forms a contractile ring at the septum => Made up of FtsZ (tubulin homologues) molecules important for bacterial septation B. It controls the replication of DNA => Replisome contains DNA replication machinery C. It separates the newly synthesized DNA molecules => ParA polymerizes/depolymerizes to attach to ParB which recognizes the DNA Sequence p...

MIC 205 Exam 3 Questions with All Correct Answers Psychrophiles - Answer-cold-loving microbes Mesophiles - Answer-those growing best between 20 degrees and 40 degrees celcius; the human pathogens are in this group Thermophiles - Answer-heat loving microbes minimum growth temperature - Answer-the lowest temperature at which the species will grow optimum growth temperature - Answer-the temperature at which the species grows best maximum growth temperature - Answer-the highest temperatur...