IB Biology Topic B4.2.2 Organisms That Are Obligate Anaerobes, Facultative Anaerobes and Obligate Aerobes Revision Notes (SL/HL)

IB Biology Topic B4.2.2 Organisms That Are Obligate Anaerobes, Facultative Anaerobes and Obligate Aerobes Revision Notes (SL/HL) | RevisionDojo

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Oxygen Relationships: Three Ways Organisms Deal With Oxygen

Whether an organism can live with or without oxygen depends on its metabolic pathways and adaptations.
Organisms fall into three categories based on their relationship with oxygen.
1. Obligate aerobes require oxygen to survive.
2. Obligate anaerobes are harmed or killed by oxygen and live without it.
3. Facultative anaerobes use oxygen when it is present but can survive without it.

Obligate Aerobes: Oxygen Is Essential

Definition

Obligate aerobes

Obligate aerobes are organisms that depend on oxygen for aerobic respiration, a process that efficiently generates ATP (energy) by breaking down glucose.

They need a continuous supply of oxygen and cannot produce enough energy without it.
They live in oxygen-rich habitats such as forests, upper soil layers, and aquatic surfaces.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Oxygen Relationships: Three Ways Organisms Deal With Oxygen

Whether an organism can live with or without oxygen depends on its metabolic pathways and adaptations.
Organisms fall into three categories based on their relationship with oxygen.
1. Obligate aerobes require oxygen to survive.
2. Obligate anaerobes are harmed or killed by oxygen and live without it.
3. Facultative anaerobes use oxygen when it is present but can survive without it.

Obligate Aerobes: Oxygen Is Essential

Definition

Obligate aerobes

Obligate aerobes are organisms that depend on oxygen for aerobic respiration, a process that efficiently generates ATP (energy) by breaking down glucose.

They need a continuous supply of oxygen and cannot produce enough energy without it.
They live in oxygen-rich habitats such as forests, upper soil layers, and aquatic surfaces.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic B4.2.2: Organisms That Are Obligate Anaerobes, Facultative Anaerobes and Obligate Aerobes Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Oxygen Relationships: Three Ways Organisms Deal With Oxygen

Obligate Aerobes: Oxygen Is Essential

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Duis aute irure dolor in reprehenderit

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Oxygen Relationships: Three Ways Organisms Deal With Oxygen

Obligate Aerobes: Oxygen Is Essential

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account