Why did bacteria in the agar dish turn yellow? - Answers
2023年8月10日 · Macconkey agar consists of agar, lactose, peptone, neutral red dye, crystal violet dye & bile salts. Bile salts inhibit growth of Gram positive bacteria & allow …
Why does petri plate is inverted during incubation? - Answers
2023年8月10日 · A shallow plate which is used in a science lab is known as a petri dish. How do you mix contents in a tube that you are preparing to pour into a Petri plate bacteria? Carefully.
Why are the bottoms of petri plates labeled rather than the lid?
2024年6月11日 · 1) The bottom of the plate contains the agar and your experiment, if the lid gets lost but the bottom is labled you haven't lost any work. If you label the lid and the lid gets lost …
What is the advantage of using a nutrient agar plate over a
2024年6月17日 · Growth- An agar plate allows you to quantify the number of colonies on an agar plate, provided it is within the 30-300 range. Whereas the slant tube cannot quantify growth …
How long can agar be inside of a petri dish with no bacteria
2024年6月13日 · Agar can be kept in a petri dish in the refrigerator at 4 degrees Celsius for up to 7 days. ... All manufactured agar plates have an expiry date listed on the actual plate or …
Why is petri dishes incubated upside down? - Answers
2024年5月29日 · Incubating petri dishes upside down helps prevent condensation from accumulating on the agar surface, which can interfere with microbial growth and observation.
Why is it important to invert a petri plate during incubation?
2023年9月14日 · Julius Richard Petri is known for being the inventor of the petri dish. In early bacteria studies, cultures were kept in lidless dishes and as a result they often became …
Which environment has the most total bacteria either petri dish or ...
2024年6月9日 · A liquid agar environment typically has more total bacteria compared to a petri dish. This is because liquid agar provides a larger surface area for bacteria to grow and …
What does agar in the petri dish provide the bacteria with
A medium (substrate) to grow on and, depending on the agar, nutrients for growth. See link below for more information.
Difference between Luria agar and Luria broth? - Answers
2024年6月12日 · Luria agar is Luria broth with the addition of 15 grams per liter agar. Agar is a solidifying agent that makes the liquid media solid at room temperature. Hence, luria agar …