Endospores Study guides, Class notes & Summaries

Decontamination - ANSWER Is the mechanical removal of most microbes from an animate or inanimate surface. Bacterial Endospores - ANSWER Bacterial endospores most resistant - usually require temperatures above boiling Vegetative Cells - ANSWER A cell that grows and divides under optimal conditions. Disinfection - ANSWER Destroys most microbial life, reducing contamination on inanimate surfaces- (not endospores) Sterilization - ANSWER Is the destruction of all microbial life. Antise...

Test Bank - Nester’s Microbiology A Human Perspective Denise G. Anderson Sarah N. Salm Deborah P. Allen Mcgraw Hill Complete All Chapters 2024. The scientist usually considered the first to see microorganisms, which he called "animalcules", was A. Redi. B. van Leeuwenhoek. C. Pasteur. D. Tyndall. Bloom's Level: 1. Remember Learning Outcome: 01.01 Section: 01.01 Topic: History of Microbiology Chapter 01 - Humans and the Microbial World 1-2 2. The word "animalcule" was coine...

Axenic Correct Answer-pure culture Biogeochemical Cycling Correct Answer-Microbes play a role through: harnessing light energy, degrading dead plant and animal matter (including recalcitrant substrates), promote plant growth, fix nitrogen gas, oxidize inorganics, metabolize toxic products Phototrophs Correct Answer-obtain energy from sunlight Heterotrophs Correct Answer-obtain energy from organic compounds Lithotrophs Correct Answer-obtain energy form inorganic compounds Endospore...

What is bacitracin? - A component of antibiotic ointments What are signs of an allergic reaction? - cracking, bleeding, excessive swelling, bumps, dry skin, oozing pain, itchy skin, raise blisters, scabbing, burning, tender to touch, refuses to heal. What is sanitizer? - an agent that reduces the number of microorganisms on a surface ex. countertops, sinks, door knobs / cavi wipes What is a disinfectant? - stronger chemical that destroys bacteria on objects that are not living ex. window c...

Question Bank for Microbiology Bacterial endospores - CORRECT ANSWERS Protects against radiation, heat & dehydration Anaerobic - Clostiridium Aerobic - Bacillus Lactic starter cultures - CORRECT ANSWERS Acid producing ability, lack of gas production, resistance to bacteriophage Effects on flavour, compatibility with other strains, temperature optima peptidoglycan - CORRECT ANSWERS Contains D- and L- amino acids Target for certain antibacterial antibiotics N-acetyl glucosamine & N-ac...

Exposure to 63℃ for 30 minutes or 72℃ for 15 seconds are recognized ways to ________. Correct Answer-pasteurize You observe that you can kill 1 × 106 C. botulinum endospores in 3.0 minutes by heat treatment at 121℃. What is the decimal reduction time (D121 value)? Correct Answer-30 sec Which of the following types of microbes would be most resistant to killing by germicides? Correct Answer-bacterial endospores The use-dilution test and Kelsey-Sykes capacity test are methods desig...

MICR 290 Final Exam Q&A - West Coast University, Los Angeles Microbiology with Diseases by Body System, 5e (Bauman) Chapter 9 Controlling Microbial Growth in the Environment 1) Washing dishes in the dishwasher with detergent and hot water is a ________ process. B) disinfecting 2) Which of the following statements is TRUE of disinfectants? D) They are used on inanimate surfaces. 3) You notice a sign in a public restroom that states "Sanitized for your safety." This means D) methods of d...

Decontamination - ANSWER Is the mechanical removal of most microbes from an animate or inanimate surface. Bacterial Endospores - ANSWER Bacterial endospores most resistant - usually require temperatures above boiling Vegetative Cells - ANSWER A cell that grows and divides under optimal conditions. Disinfection - ANSWER Destroys most microbial life, reducing contamination on inanimate surfaces- (not endospores) Sterilization - ANSWER Is the destruction of all microbial life. Antise...

Wet mount Correct Answer-A slide preparation technique where a specimen is placed on the slide with a drop of liquid Darkfield microscopy Correct Answer-Type of microscopy where a bright image is seen on a dark background Brightfield microscopy Correct Answer-Type of microscopy where a dark image is seen on a bright background Phase contrast microscopy Correct Answer-Type of microscopy where higher contrast and higher-definition images are produced Gram stain Correct Answer-A differe...

Hershey and Chase performed an experiment in order to determine how bacteriophages infect bacteria. What did they find? CORRECT ANSWER The bacteriophage injects DNA into the host cell. This was found because, after centrifugation, the pellet was radioactive The largest difference between a Gram + and Gram - bacterial cell is: CORRECT ANSWER The gram + cell has a much thicker peptidoglycan layer Why does a Gram + cell stain blue/purple in a gram stain? CORRECT ANSWER The Gram + cell stains ...