IB Biology Topic C1.2.7 Role of NAD as a Carrier of Hydrogen Revision Notes (HL)

IB Biology Topic C1.2.7 Role of NAD as a Carrier of Hydrogen Revision Notes (HL) | RevisionDojo

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NAD is a reusable carrier that shuttles hydrogen and electrons in respiration

NAD (nicotinamide adenine dinucleotide) is a coenzyme that carries hydrogen and electrons in cellular respiration.
It cycles between two forms so it can be used again and again: NAD⁺ (the empty carrier) and reduced NAD (the loaded carrier).

Oxidation and reduction always happen together

Oxidation is the loss of electrons or hydrogen from a molecule.
Reduction is the gain of electrons or hydrogen by a molecule.
Oxidation and reduction occur together as paired redox reactions, so when one molecule is reduced another is oxidised.

Analogy

Tip

Remember OIL RIG: Oxidation Is Loss, Reduction Is Gain.

NAD picks up hydrogen when substrates are oxidised

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NAD is a reusable carrier that shuttles hydrogen and electrons in respiration

NAD (nicotinamide adenine dinucleotide) is a coenzyme that carries hydrogen and electrons in cellular respiration.
It cycles between two forms so it can be used again and again: NAD⁺ (the empty carrier) and reduced NAD (the loaded carrier).

Oxidation and reduction always happen together

Oxidation is the loss of electrons or hydrogen from a molecule.
Reduction is the gain of electrons or hydrogen by a molecule.
Oxidation and reduction occur together as paired redox reactions, so when one molecule is reduced another is oxidised.

Analogy

Tip

Remember OIL RIG: Oxidation Is Loss, Reduction Is Gain.

NAD picks up hydrogen when substrates are oxidised

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 C1.2.7: Role of NAD as a Carrier of Hydrogen Notes

NAD is a reusable carrier that shuttles hydrogen and electrons in respiration

Oxidation and reduction always happen together

NAD picks up hydrogen when substrates are oxidised

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

NAD is a reusable carrier that shuttles hydrogen and electrons in respiration

Oxidation and reduction always happen together

NAD picks up hydrogen when substrates are oxidised

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

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics