what is energy? glucose what is energy? –ability to rearrange molecules in chemical reactions...
TRANSCRIPT
What is Energy?
–ability to rearrangeMolecules in chemical reactions
–ability to do work
Some definitions:
Major Types of Energy
• Potential = stored
chemical
What types of energy are used by living things?
• Kinetic = motion
mechanical
Glucose
Forms of chemical energy
Glucose
Different forms of stored chemical energy are used in living things
Energy Transformation
reactants ------------------------> products
Is running an energy gain or
release?
How about digestion?
How is ATP used in the cell?
What is ATP?• Energy “Currency”
used by cells- Take a second to draw the
outlines and label this molecule
So where is all the energy stored?? • The energy that ATP
provides is a result of its 3rd phosphate bond
• This is potential energy.
• Each time the ATP molecule loses its third phosphate bond all of that potential energy is given off to be used in doing work
Recap question: what are some examples of work on cellular level? Other examples?
ATP - ADP Cycle
•ATP is used as energy and its byproduct is ADP
•ADP is brought to ATP Synthase (what type of protein is this?) which adds a Phosphate group forming ATP again
So what do we use ATP for?
Some important examples:1. Synthesis of complex molecules
(proteins, cholesterols, pigments…etc)
2. Sending of nerve signals between neurons ( imagine a stack of domino’s…each signal sent is like flicking them over…setting up requires energy.
3. Contraction of muscle fibers. (flex your bicep…you just used ATP to do that)
Practice Question:
Using the analogy of a battery, what is the relationship between ATP and ADP?
Please get into your lab groups and answer this question on the whiteboards.