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Why the streptococcus species that are catalase negative are capable of growth in the presence of oxygen?
Wiki User
∙ 11y ago
Streptococci are facultative anaerobes. They have the superoxide distumate to stimulate O2 which breaks down superoxide. This allows them to tolerate O2 in the absence of catalase activity.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agoIn the abscence of these enzymes, the toxic concentration of H202 cannot be degraded when these organisms are cultivated in the presence of oxygen.
Wiki User
∙ 9y agoStreptococci are facultative anaerobes and this ability allows them to tolerate O2 in the absence of catalase activity. They contain the superoxide distumate to stimulate O2.
Wiki User
∙ 13y agoread your lab manual!
Wiki User
∙ 11y agobecause of lack of catalase enzyme
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Is Neisseria species catalase positive?
Yes, it is catalase positive. This is because it is capable of breaking down hydrogen peroxide (H2O2) to give water and oxygen. The presence of bubbles when hydrogen peroxide is added to E. coli on a microscope slide is a phenotypic (observable physical characteristic) proof that it is catalase positive.
Why cant methylene blue be used in place of nigrosin in negative staining?
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Is Neisseria species catalase positive?
Yes, it is catalase positive. This is because it is capable of breaking down hydrogen peroxide (H2O2) to give water and oxygen. The presence of bubbles when hydrogen peroxide is added to E. coli on a microscope slide is a phenotypic (observable physical characteristic) proof that it is catalase positive.
How does Streptococcus and Escherichia oxygen requirements differ?
Since these species are both facultative anaerobes, both types of bacteria are capable of utilizing fermentation for their energy needs, as opposed to respiration, which occurs in the presence of oxygen.
The presence of which structure provides evidence that an organism is capable of locomotion?
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What happens on the catalase test?
Catalse Test Catalase (also known as peroxidase) is an enzyme that catalyses the breakdown of hydrogen peroxide to oxygen and water. Most higher organisms produce catalase, but in bacteriology this test is usually used to differentiate staphylococci (Catalase positive) from streptococci (Catalase negative). Chemical equation for the breakdown of hydrogen peroxide:2H2O2 → 2H2O + O2 In this test a drop of hydrogen peroxide is emulsified with the bacterial growth, if the organism is catalase positive active bubbling is seen (formation of oxygen) In catalase negative reactions no active bubbling is seen
What makes plants capable of making their own food?
Presence of the photocatalyst i.e. chlorophyll.
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No, the skin is only capable of producing vitamin D in the presence of sunlight.
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Not necessarily. A negative EBITDA implies that the entity is not capable to cover its interest and tax payments with its operating profits.
What is upper explosive limit?
The highest concentration of gas in air is capable to producing flash of fire in presence of ignition source.
What bacterial species are gram negative coccobacilli capable of living intracellular within a host?
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It was a siege weapon. In addition to being capable of breaking down walls and other structures, it had some real negative affects on morale.
What is correct 'capable to' or 'capable of?
"Capable of"
