Why are the streak plates incubated at 7°C when selecting for psychrotrophic bacteria?

Q: What is the purpose of the pour plate technique? If a pure culture is used to inoculate the plate,…

A: PURPOSE OF POUR PLATE TECHNIQUE The pour plate techniques can be used to determine the number of…

Q: In a bacterial culture on an agar plate, what is a zone of inhibition?     An area where the…

A: Microbial culture is a method of multiplying microbial organisms by letting them reproduce in…

Q: 1. You are given a 1 gram soil sample of unknown bacterial load. After doing 10-fold serial…

A: Serial dilution is a fundamental technique used in microbiology to obtain a precise and controlled…

Q: The smear prepared from the gram-positive control shown gram-negative results. Describe 3 reasons…

A: Gram staining is a procedure which differentiates between two different types of bacteria based on…

Q: A broth culture is initially inoculated with a single bacterial cell. For the first hour the…

A: * Given that  The bacteria has generation time of 30 minutes. So it takes about thirty minutes to…

Q: What factors can cause a lag phase in a bacterial growth curve?

A: The bacterial growth curve represents the number of live cells in a bacterial population over a…

Q: Based on these results, which of the following statements is true regarding the effectiveness of…

A: A disinfectant is a chemical substance or compound that is used to inactivate or destroy the…

Q: Describe the difference between the appearance of surface and subsurface colonies in a pour plate.…

A: The bacteria is the unicellular prokaryotic organism that maintains a definite shape since it…

Q: Why does saliva not serve as a good microbialgrowth medium?

A: Saliva is the watery, frothy substance that is produced in the mouths of some animals, including…

Q: You just finished plating your electroporatio products on your YPD-Zeocin plate and you think you…

A: Electroporation is a technique used to introduce foreign DNA into cells by applying an electric…

Q: Gardnerella vaginalis is a gram variable rod. What type of media should be used when culturing for…

A: Gardnerella vaginalis grows primarily on enriched culture media, dominantly used being Modified…

Q: During the preparation of a smear leading into simple staining of the bacterial culture S.…

A: S. epidermidis is a gram-positive bacteria.