The bright fluorescent sheen on cold cuts left in the refrigerator toolong is caused by Pseudomonas fluorescens

pseudomonas colour in CLED media

Pseudomonas isSelect an answerANitrogen fixing bacteriaBDenitrifying bacteriaCNitrifying bacteriaDBoth B and C

Beberapa bakteri mampu menghasilkan Indole Acetic Acid merupakan hormon auksin pertama yang berperan besar sebagai hormon pemacu pertumbuhan pada tanaman. Manakah jenis bakteri dibawah ini yang mampu menghasilkan fitohormon tersebut?Question 1Answera.Rhizobacteria sp.b.Mycobacterium sp.c.Acetobacter xylinumd.Pseudomonas putidae.Bacillus laterosporusClear my choice

You are performing a Gram stain on gram-positive bacteria and you stop after the addition of the first dye. What is the appearance of the bacteria at this point?Question 13Answera.purpleb.colorlessc.redd.brown

"Bioluminescence" refers to light produced by living organisms. Bioluminescent bacteria are mostly found in marine environments, where they live in symbiosis with other marine organisms. One commonality in the chemical reactions that cause bioluminescence in bacteria is the dependence on oxygen. According to a study by Eveline Brodl and colleagues, the enzyme luciferase acts as a catalyst, helping the oxidation process of substrates that emit light-producing photons. Luminous bacteria is often associated with fecal pellets in the ocean. Fishes are attracted to the luminous debris and by ingesting it, they enter into a symbiotic relationship with the bioluminescent bacteria, allowing the bacteria to thrive in the rich nutritional environment of their guts.Based on the text, how is the enzyme luciferase believed to be involved in the bioluminescence observed by Brodl and colleagues?Luciferase is the main reactive agent that mixes with substrates in the bacteria and allows them to produce the light-emitting photons. eliminateLuciferase allows bioluminescent bacteria to live in the nutrient-rich environment of fish guts, providing the bacteria with the chemicals they need to produce light. eliminateLuciferase stimulates the chemical reaction with oxygen that results in in the emission of photons that give the bacteria their bioluminescence.eliminateLuciferase attracts fish to fecal matter, causing them to digest bacteria and enter a symbiotic relationship.