1. Energy in a Cell PART 1 Photosynthesis and Cellular Respiration
chloroplast
mitochondria
water
CO2
glucose
sun
ATP

2. Predictions Why do humans rely on plants?!!!
What biomolecule is formed?!!!

3. Importance of energy ATP
Cells need energy to be able to carry out important metabolic functions to sustain life.
Ex: Active transport, cell division, movement of flagella or cilia, transport, and storage of proteins
ATP

4. Energy Transformations
All energy originates from the sun
Radiant energy is transformed into chemical energy (glucose) during the process of photosynthesis.
Chemical energy (glucose) is transformed into another chemical (ATP) during the process of cellular respiration.
All organisms perform cellular respiration or fermentation to produce usable energy. 4

5. Energy Transformations
Photosynthesis
Light Energy
Cellular Respiration
Oxygen
Radiant to Chemical
Glucose
Chemical to Chemical
Water
Product
Carbon Dioxide
Reactant 5

6. Use the diagram to complete the following sentence stem:
Based on the energy transformations diagram, I can infer that _____________________________________________________________________________________________________________________________ 6

7. Autotrophs Make their own food by using the energy from the sun
Plants, algae, some bacteria are able to produce glucose and store it as starch through the process of photosynthesis

8. Photosynthesis: the autotrophic process of producing sugars by converting light energy from the sun into chemical energy

9. Photosynthesis
Autotrophs trap electrons from light energy in the chloroplasts of their cells.
Use light energy to excite electrons
Use excited electrons to form the bonds in a sugar molecule
6H2O + 6CO  C6H12O6 + 6O2
Light Energy
Glucose 9

10. Photosynthesis chemical equation
6CO2 + 6H2O→C6H12O6 + 6O2
6 carbon dioxide molecules+ 6 water molecules react to produce glucose + 6 oxygen molecules
reactant
product

11. Use the equation for photosynthesis to answer the question……
How is oxygen made during the process of photosynthesis? In other words where does the oxygen come from?

12. Chlorophyll Photosynthesis also requires the pigment
chlorophyll, which absorbs
specific wavelengths of
light.
Chlorophyll – is found in the chloroplasts of autotrophic organisms and captures light energy from the sun

13. STAGES OF PHOTOSYNTHESIS
Energy captured from sunlight by being absorbed by chlorophyll
Light-dependent reactions – light energy converted to chemical energy temporarily stored as ATP and NADPH
Calvin cycle – chemical energy powers formation of organic compounds using CO2

15. How autotrophs capture sunlight energy
Click image to play video.

16. Photosynthesis What are the reactants?___________
What are the products?____________

17. Exit Ticket:
Explain the role of CO2 in the formation of organic molecules.