Would you rather… Your parents are giving you $100 for your birthday… Would you rather receive the money as $100 check or $100 in cash? Why? What are the advantages and disadvantages for each option?
1.) Where do living things get their energy? Heterotrophs? Autotrophs? Does food give you energy??
Does food give you energy?? The answer… yes AND no!
Does food give you energy?? Yes! The food we eat has potential energy stored in the form of carbon-based macromolecules -Lipids -Proteins -Carbohydrates -Nucleic Acid NO!The energy stored within the food is not a type of energy that our cells can use…in order to get that energy your cells must conduct cellular respiration Biomolecules
ATP! (Adenosine Triphosphate) All living things use ATP for energy ATP helps cells to build molecules and move materials into and out of the cell ATP is like Cells can “spend” ATP but they constantly have to work to make more ATP so they don’t run out.
What does ATP look like? Adenine (nitrogenous base) Ribose (sugar) 3 phosphate groups
How do cells use ATP? Energy is released when the bond between the last two phosphate groups is broken
ADP (Adenosine Diphosphate) Created when the 3rd phosphate group is removed from ATP This is the “uncharged” form of ATP To “recharge” it, the 3rd phosphate group must be reattached (this happens during cellular respiration)
How do cells get ATP? Remember, food does not contain ATP Food contains macromolecules that can be broken down to make ATP Plants and animals perform Cellular Respiration to convert the energy stored in food into ATP
How do cells get ATP? The amount of ATP that can be made depends on the type of biomolecule that is used to create ATP Glucose (carbohydrate/sugar) yields about 36 ATP A triglyceride (lipid/fat) can yield up to 146 molecules of ATP
Biomolecules Lipids Carbohydrates ATP
Check your understanding! What does ATP stand for? Sketch an ATP molecule and label the parts Does food contain energy? (EXPLAIN!) List three macromolecules found in food. Sketch the ATP/ADP cycle