IB Biology Topic C1.2.3 Energy Transfers During Interconversions Between ATP and ADP Revision Notes (SL/HL)

IB Biology Topic C1.2.3 Energy Transfers During Interconversions Between ATP and ADP Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

The ATP-ADP cycle transfers energy: hydrolysis releases it, synthesis stores it

ATP (adenosine triphosphate) is a high-energy nucleotide that serves as the cell's main energy currency.
The interconversion between ATP and ADP (adenosine diphosphate) transfers the energy that drives cellular processes.
ATP has three phosphate groups, and the terminal bond is the reactive one, with the full structure covered in C1.2.1.

Hydrolysis of ATP breaks the terminal phosphate bond and releases energy

Note

The high-energy bonds between phosphate groups are not high-energy because they store a lot of energy.
They release energy when broken because the negatively charged phosphate groups repel each other.

Hydrolysis: breaking down ATP

The hydrolysis of ATP to ADP releases energy that cells use for work.
It breaks a phosphoanhydride bond, releasing an inorganic phosphate group (Pi) and forming ADP.

Definition

Hydrolysis

Hydrolysis is a chemical reaction where water ($H_2O$) breaks down a compound.

Nice try, unfortunately this paywall isn't as easy to bypass as you think. Want to help devleop the site? Join the team at https://revisiondojo.com/join-us. exercitation voluptate cillum ullamco excepteur sint officia do tempor Lorem irure minim Lorem elit id voluptate reprehenderit voluptate laboris in nostrud qui non Lorem nostrud laborum culpa sit occaecat reprehenderit

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

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.

Duis aute irure dolor in reprehenderit

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

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.

Unlock the rest of this chapter with a free account

The ATP-ADP cycle transfers energy: hydrolysis releases it, synthesis stores it

ATP (adenosine triphosphate) is a high-energy nucleotide that serves as the cell's main energy currency.
The interconversion between ATP and ADP (adenosine diphosphate) transfers the energy that drives cellular processes.
ATP has three phosphate groups, and the terminal bond is the reactive one, with the full structure covered in C1.2.1.

Hydrolysis of ATP breaks the terminal phosphate bond and releases energy

Note

The high-energy bonds between phosphate groups are not high-energy because they store a lot of energy.
They release energy when broken because the negatively charged phosphate groups repel each other.

Hydrolysis: breaking down ATP

The hydrolysis of ATP to ADP releases energy that cells use for work.
It breaks a phosphoanhydride bond, releasing an inorganic phosphate group (Pi) and forming ADP.

Definition

Hydrolysis

Hydrolysis is a chemical reaction where water ($H_2O$) breaks down a compound.

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 C1.2.3: Energy Transfers During Interconversions Between ATP and ADP Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

The ATP-ADP cycle transfers energy: hydrolysis releases it, synthesis stores it

Hydrolysis of ATP breaks the terminal phosphate bond and releases energy

Hydrolysis: breaking down ATP

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

The ATP-ADP cycle transfers energy: hydrolysis releases it, synthesis stores it

Hydrolysis of ATP breaks the terminal phosphate bond and releases energy

Hydrolysis: breaking down ATP

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