16 terms

Chapter 8

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ATP
Chemical compound used to store & release energy. Consists of adenine, ribose, & 3 phosphate groups.
ADP
Consists of adenine, ribose, & 2 phosphate groups.
How is energy stored in ATP released?
By breaking down the chemical bond between the second & third phosphate.
What are som cellular processes that are fueled by ATP?
muscle contraction, protein synthesis, cell division, & active transport
When a cell has energy available, how can it store small amounts of energy?
It can add a phosphate group to ADP molecules, producing ATP
Where do cells get the energy to regenerate ATP?
Carbohydrates
Hydrolysis of ATP
Process where the bonds between phosphates groups are broken
--energy is released.
Does the hydrolysis of ATP result in an output or input of energy?
output
Which molecule, ATP or ADP, have a higher potential energy?
ATP because it has three phosphate groups rather than ADP which has two.
Is ATP endothermic or exothermic?
Exothermic
Phosphorylation
Reversal hydrolysis of ATP reaction
Phosphorylation of ATP
ADP + Pi + Energy → ATP + H₂O
Is the phosphorylation of ATP endothermic or exothermic?
Endothermic because it is absorbing energy during the reaction
When ATP is hydrolyzed, what is available?
free energy
After it is used, an ADP molecule is recycled back into ATP. What cellular, exergonic processes supply the energy needed for the phosphorylation into ADP?
cellular respiration
AMP
adenosine monophosphate = adenine + ribose + 1 phosphate --- made from ATP
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