15 Questions
What is the ultimate source of all energy on earth?
Solar energy
Which type of organisms are capable of making their own food?
Autotrophs
What is the common energy currency of cells?
ATP
When is energy released from ATP?
When a phosphate is removed
What type of organisms live and feed on dead and decaying organisms?
Saprophytes
What is the reversible breakdown of ATP to ADP called?
Hydrolysis
What is the transfer of energy from one chemical reaction to another called?
Energy coupling
Which type of reaction proceeds with a net release of free energy?
Exergonic reaction
What is the type of reaction that absorbs free energy from its surroundings?
Endergonic reaction
What form does ATP have that can be used to power cellular processes or reactions?
Charged battery
Which type of reaction is directly linked with an energetically unfavorable reaction such as ATP regeneration?
Endergonic reaction
What is the reversible breakdown of ATP to ADP called?
ATP hydrolysis
Which form of ATP has energy that can be used to power cellular processes or reactions?
Charged form
What is the transfer of energy from one chemical reaction to another called?
Energy coupling
Which type of chemical reaction proceeds with a net release of free energy?
Exergonic reaction
Study Notes
Energy and Cells
- The ultimate source of all energy on Earth is the sun.
Organisms and Energy
- Autotrophic organisms, such as plants, are capable of making their own food.
Cellular Energy
- The common energy currency of cells is ATP (adenosine triphosphate).
- Energy is released from ATP when it is broken down to ADP (adenosine diphosphate).
- ATP has a high-energy phosphate bond that can be broken down to release energy.
Energetic Reactions
- Exergonic reactions proceed with a net release of free energy.
- Endergonic reactions absorb free energy from their surroundings.
- ATP hydrolysis, the breakdown of ATP to ADP, is an example of an exergonic reaction.
ATP and Energy Transfer
- ATP can be used to power cellular processes or reactions when it is in its high-energy state.
- The transfer of energy from one chemical reaction to another is called energy coupling.
- Energy coupling is often linked with an energetically unfavorable reaction, such as ATP regeneration.
ATP Breakdown
- The reversible breakdown of ATP to ADP is called ATP hydrolysis.
- ATP hydrolysis releases energy that can be used to power cellular processes or reactions.
Test your knowledge on the flow of energy in ecosystems with this quiz. Learn about autotrophs, heterotrophs, and saprophytes and how they obtain energy from the sun through different sources.
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