IB Biology Topic C1.3.10 Advantages of the Structured Array of Different Types of Pigment Molecules Revision Notes (HL)

IB Biology Topic C1.3.10 Advantages of the Structured Array of Different Types of Pigment Molecules Revision Notes (HL) | RevisionDojo

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Many Pigment Types Around One Reaction Centre Capture Light Far Better

Definition

Photosystems

Photosystems are complexes of proteins and pigments located in the thylakoid membranes of chloroplasts.

A photosystem arranges many pigment molecules around a single reaction centre.
This structured array captures light far more efficiently than one pigment could alone.

Analogy

A single pigment is like one cup left out in a rainstorm.
It catches only a little of what falls and misses most of the light.
A whole array acts like a wide field of cups, catching much more.

Advantage 1: More Photons Are Captured

A single pigment molecule would absorb only a few photons each second.
Hundreds of pigments working together greatly increase the total light captured per reaction centre.

Example

In dim habitats like a forest floor, the array lets a plant capture even scattered photons.
This keeps photosynthesis going where light is scarce.

Advantage 2: A Broader Range of Wavelengths Is Absorbed

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Note

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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 nisi ut aliquip ex ea commodo consequat.

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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Many Pigment Types Around One Reaction Centre Capture Light Far Better

Definition

Photosystems

Photosystems are complexes of proteins and pigments located in the thylakoid membranes of chloroplasts.

A photosystem arranges many pigment molecules around a single reaction centre.
This structured array captures light far more efficiently than one pigment could alone.

Analogy

A single pigment is like one cup left out in a rainstorm.
It catches only a little of what falls and misses most of the light.
A whole array acts like a wide field of cups, catching much more.

Advantage 1: More Photons Are Captured

A single pigment molecule would absorb only a few photons each second.
Hundreds of pigments working together greatly increase the total light captured per reaction centre.

Example

In dim habitats like a forest floor, the array lets a plant capture even scattered photons.
This keeps photosynthesis going where light is scarce.

Advantage 2: A Broader Range of Wavelengths Is Absorbed

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 C1.3.10: Advantages of the Structured Array of Different Types of Pigment Molecules Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Many Pigment Types Around One Reaction Centre Capture Light Far Better

Advantage 1: More Photons Are Captured

Advantage 2: A Broader Range of Wavelengths Is Absorbed

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

Many Pigment Types Around One Reaction Centre Capture Light Far Better

Advantage 1: More Photons Are Captured

Advantage 2: A Broader Range of Wavelengths Is Absorbed

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