Presentation is loading. Please wait.

Presentation is loading. Please wait.

Photosynthesis and Cellular Respiration

Similar presentations

Presentation on theme: "Photosynthesis and Cellular Respiration"— Presentation transcript:

1 Photosynthesis and Cellular Respiration

2 Two ways to get food “troph” = food Autotrophs Heterotrophs
Auto = self Autotrophs make their own food Heterotrophs Hetero = different Heterotrophs get their food from something else (they have to eat it)

3 Two ways to get food Autotrophs Plants Heterotrophs Animals

4 Photosynthesis

5 Photosynthesis Converts the sun’s energy into chemical energy stored in sugar Takes place in specialized structures inside plant cells called chloroplasts Chlorophyll is the pigment that absorbs sunlight.

6 Photosynthesis Reaction
6CO2 + 6 H2O + light energy → C6H12O6 + 6O2 The food plants make is called glucose (sugar)

7 Photosynthesis 2 different reactions Light Reactions Calvin Cycle
Capture light energy for photosynthesis Calvin Cycle Produces glucose sugar



10 Cellular Respiration Cells Breathing

11 Cellular Respiration Happens in both plant and animal cells
Overall Reaction: C6H12O6 + 6O2 → 6CO2 + 6H2O

12 Cellular Respiration Overview
Depends on whether or not there is oxygen Aero = oxygen Aerobic Respiration – makes energy Anaerobic Respiration – Fermentation (makes alcohol)

13 Step 1: Glycolysis The energy that cells make and use is called ATP
Adenosine triphosphate Glycolysis makes 2 molecules of ATP (energy) Glycolysis happens in the cytoplasm of the cell

14 Step 2: Check for Oxygen If oxygen is present, the cell can make more ATP If no oxygen is present, the cell has to recycle the pieces from glycolysis and makes alcohol.


16 Step 3 with oxygen: Cellular Respiration
Oxygen required=aerobic 2 more sets of reactions which occur the cell’s mitochondria 1. Kreb’s Cycle – makes 2 ATP Also called the Citric Acid Cycle 2. Electron Transport Chain – makes ATP

17 Kreb’s Cycle (Citric Acid Cycle)

18 Step 3 without oxygen: Fermentation
The cell must recycle the materials from glycolysis. This recycling process is called fermentation. The product of fermentation is alcohol.


20 Energy Tally 36 ATP for aerobic vs. 2 ATP for anaerobic
Glycolysis ATP Kreb’s ATP Electron Transport 32 ATP 36 ATP Anaerobic organisms can’t be too energetic but are important for global recycling of carbon





Download ppt "Photosynthesis and Cellular Respiration"

Similar presentations

Ads by Google