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yes, all aerobic cells are oxidase positive. The oxidase test is testing for the presence of cytochrome oxidase [by reducing it with an artificial substrate which turns purple when oxidised]. In aerobic cells cytochrome oxidase's normal role is in the electron transport chain, passing electrons from cytochrome c to oxygen.
hence if the cell is aerobic then oxygen is terminal electron acceptor in the cells ETC and thus it will give a positive result in the oxidase test.
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Why are strict aerobes oxidase positive?
Strict aerobes must be oxidase positive because oxidase is an enzyme. It is critical to cellular respiration, specifically the final reduction of oxygen in the electron transport chain.
Do all bacteria have capsules?
No not all bacteria have capsules. However they do have cell membranes to protect them. Also not all bacteria have flagella or pili.
What is a gram positive aerobic bacteria which uses citrate and dextrose?
I think that there are two possible answers....first, Nocardia and, also, Bacillus anthracis. Lactobacillus might also work; however it is a microaerophilic organism and can only tolerate lesser levels of oxygen than a true aerobic organism. But all three are gram positive and, I believe, thrive with both dextrose and citrate. Nocardia has a Trycarboxylic acid cycle which utilizes both dextrose and citrate.
What are the biochemical tests for identification of bacillus subtilis?
The Kirby-Bauer antibiotic test is a general test that determines if an organism is resistant or susceptible to different antibiotics. Many different types of antibiotics can be used but some of the common ones are penicillin, tetracycline, chloramphenicol, and streptomycin.
Is lactobacillus a prokaryote?
The lactobacillus refers to any of various rod-shaped, sessile aerobic bacteria from the genus Lactobacillus that ferment lactic acid from sugars and are the causative agents in the souring of milk.
Why are strict aerobes oxidase positive?
Strict aerobes must be oxidase positive because oxidase is an enzyme. It is critical to cellular respiration, specifically the final reduction of oxygen in the electron transport chain.
Is the sponge Gelliodes fibrosa aerobic or anaerobic?
All sponges are aerobic, they need oxygen to live. Some do however, live in low oxygen environments and they can 'house' anaerobic bacteria.
Do all bacteria have capsules?
No not all bacteria have capsules. However they do have cell membranes to protect them. Also not all bacteria have flagella or pili.
Why are oxygen and baceria added to the water sent to an aeration tank?
Aerobic bacteria breath oxygen as they do their work. These aerobic bacteria are needed to convert the deadly poisonous Ammonia that all fish produce in water, firstly into poisonous Nitrite and then convert the Nitrite into virtually harmless Nitrate.
What is a gram positive aerobic bacteria which uses citrate and dextrose?
I think that there are two possible answers....first, Nocardia and, also, Bacillus anthracis. Lactobacillus might also work; however it is a microaerophilic organism and can only tolerate lesser levels of oxygen than a true aerobic organism. But all three are gram positive and, I believe, thrive with both dextrose and citrate. Nocardia has a Trycarboxylic acid cycle which utilizes both dextrose and citrate.
What are the biochemical tests for identification of bacillus subtilis?
The Kirby-Bauer antibiotic test is a general test that determines if an organism is resistant or susceptible to different antibiotics. Many different types of antibiotics can be used but some of the common ones are penicillin, tetracycline, chloramphenicol, and streptomycin.
What is the family name of molybdenum?
Molybdenum is in the Xanthine Oxidase family.
What kind of bacteria can harm animals?
Just about any - gram negative, gram positive and acid-fast are all known to have pathogenic bacteria within them.
Why do bacteria reproduce quicker in an aerobic environment?
Not all bacteria do. Some can not grow in the presence of oxygen. Those that do (obligate aerobes and facultative anaerobes) grow quicker in oxygen since it facilitiates their energy cycle and ideal environment.
Is lactobacillus a prokaryote?
The lactobacillus refers to any of various rod-shaped, sessile aerobic bacteria from the genus Lactobacillus that ferment lactic acid from sugars and are the causative agents in the souring of milk.
What are the differences between gram positive and gram negative bacteria?
The cell walls are the difference. Gram stain will be positive, as the cell wall is thicker. Gram-positive bacteria retain the (crystal violet) dye. Then a decolorizer will be added and then the pink counterstain. This will give all gram-negative bacteria a red or pink coloring. All the steps are done for all cultures being Gram stained and when they grow, the color will be seen as well as the shape.
Why cant penicillin be used to cure every infection?
Penicillin is effective against gram positive and negative coccus types of bacteria and gram positive bacillus types of bacteria only. So it does not cover all the infections. Now a days many bacteria has developed resistance to it.
