IB Biology Topic C1.2.2 Life Processes Within Cells That ATP Supplies with Energy Revision Notes (SL/HL)

IB Biology Topic C1.2.2 Life Processes Within Cells That ATP Supplies with Energy Revision Notes (SL/HL) | RevisionDojo

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ATP powers active transport, moving substances against their concentration gradient

Definition

Active transport

Active transport is the movement of molecules or ions across a membrane against their concentration gradient (from low to high concentration), which requires energy.

Cells often need to move substances against their concentration gradient, from low to high concentration.
This process of active transport requires energy from ATP.

Example

The sodium-potassium pump is a classic example.
It uses ATP to move sodium ions out and potassium ions into the cell, maintaining ion gradients for nerve impulses and muscle contraction.

Active transport and passive transport differ in whether they use ATP

Common Mistake

Do not confuse active transport with passive transport.
Passive transport needs no energy because it moves substances down their concentration gradient.

ATP powers anabolism, driving the synthesis of macromolecules

Cells constantly build complex molecules such as proteins, DNA, and polysaccharides.
These anabolic reactions require energy because they absorb it.

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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

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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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ATP powers active transport, moving substances against their concentration gradient

Definition

Active transport

Active transport is the movement of molecules or ions across a membrane against their concentration gradient (from low to high concentration), which requires energy.

Cells often need to move substances against their concentration gradient, from low to high concentration.
This process of active transport requires energy from ATP.

Example

The sodium-potassium pump is a classic example.
It uses ATP to move sodium ions out and potassium ions into the cell, maintaining ion gradients for nerve impulses and muscle contraction.

Active transport and passive transport differ in whether they use ATP

Common Mistake

Do not confuse active transport with passive transport.
Passive transport needs no energy because it moves substances down their concentration gradient.

ATP powers anabolism, driving the synthesis of macromolecules

Cells constantly build complex molecules such as proteins, DNA, and polysaccharides.
These anabolic reactions require energy because they absorb it.

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 C1.2.2: Life Processes Within Cells That ATP Supplies with Energy Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

ATP powers active transport, moving substances against their concentration gradient

Active transport and passive transport differ in whether they use ATP

ATP powers anabolism, driving the synthesis of macromolecules

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

ATP powers active transport, moving substances against their concentration gradient

Active transport and passive transport differ in whether they use ATP

ATP powers anabolism, driving the synthesis of macromolecules

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