Table of Contents
- 1 What inhibits growth of vegetative bacterial cells?
- 2 What kills vegetative bacterial cells?
- 3 What kills or inhibits the growth of microorganisms?
- 4 What is Endospore in microbiology?
- 5 Which chemical agents will denature proteins?
- 6 What prevents the growth of bacteria?
- 7 Which of the following is an agent that kills microorganisms or suppresses their growth?
- 8 What is endospore formation called?
What inhibits growth of vegetative bacterial cells?
Heat: Kills microorganisms by denaturing their enzymes and other proteins. Heat resistance varies widely among microbes. Kills vegetative forms of bacterial pathogens, almost all viruses, and fungi and their spores within 10 minutes or less.
What kills vegetative bacterial cells?
Pasteurize
Pasteurize – kills vegetative bacteria. Thermoduric bacteria will survive. 4. Dry Heat – Baking – 160oC (320oF) for 2 hours, or 170oC (338oF) are common sterilizing treatments.
What type of agent inhibits growth of bacteria?
An antimicrobial agent is defined as a natural or synthetic substance that kills or inhibits the growth of microorganisms such as bacteria, fungi and algae.
What kills or inhibits the growth of microorganisms?
An antiseptic is an agent that kills or inhibits growth of microbes but is safe to use on human tissue. A sanitizer is an agent that reduces microbial numbers to a safe level. An antibiotic is a metabolic product produced by one microorganism that inhibits or kills other microorganisms.
What is Endospore in microbiology?
Endospore – A differentiated cell formed within cells of certain Gram-positive bacteria that are extremely resistant to heat and other harmful conditions and agents. Endopsore are the resting stage during the life cycle of some bacteria, formed in response to adverse conditions.
What are the physical agents for controlling microbial growth?
Some commonly used physical agents in controlling microbial growth are;
- Heat or temperature.
- low temperature.
- Radiation.
- Desiccation.
- Lyophilization (freeze drying)
- Osmotic pressure.
- Filtration.
Which chemical agents will denature proteins?
The agents most frequently used for this purpose are urea and guanidinium chloride. These molecules, because of their high affinity for peptide bonds, break the hydrogen bonds and the salt bridges between positive and negative side chains, thereby abolishing the tertiary structure of the peptide chain.
What prevents the growth of bacteria?
Bacterial growth slows down or stops in food that is kept at temperatures colder than 5°C or hotter than 63°C. Most bacteria can survive cold temperatures though, (in a fridge or freezer), and resume multiplication when they are back in the Danger Zone.
What do Antimicrobial Agents do?
Antimicrobials work at a cellular level to continually disrupt and prevent the growth of microorganisms. By creating an inhospitable environment for microorganisms like bacteria, mold and mildew, antimicrobials protect everyday products like countertops, toys, surface coatings, textiles and hospital equipment.
Which of the following is an agent that kills microorganisms or suppresses their growth?
Antimicrobial—an agent that kills microorganisms or suppresses their multiplication or growth.
What is endospore formation called?
The process of formation of endospore is called Sporulation or Sporogenesis.