Bellringer 3/30 What is the purpose of photosynthesis? What does the plant need to perform...
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Transcript of Bellringer 3/30 What is the purpose of photosynthesis? What does the plant need to perform...
Bellringer 3/30•What is the purpose of photosynthesis? •What does the plant need to perform
photosynthesis? •What are the products of photosynthesis?•What is the purpose of respiration? •What does an organism need to perform
cellular respiration? •What are the products of cellular
respiration? •What are the products of alcoholic
fermentation?
Why do organisms need food?
Organisms use food to make ATP
ATP (adenosine triphosphate) → the
molecule used for energy in ALL cells.
•When a cell needs to use energy, it breaks off one phosphate group to make
ADP release energy = ATP → ADP + P
•When a cell wants to store
energy, it makes ATPstore energy = ADP + P → ATP
What process makes ATP (energy)?
RESPIRATION!
•Chemical reaction that makes ATP for ALL organisms.
TWO types of respiration…
OR
Aerobic (Cellular)
Respiration
Anaerobic Respiration
(Fermentation)
Aerobic (Cellular) RespirationUses O2 and
food (glucose) to make ATP
Makes LOTS of ATP
Occurs in the MITOCHONDRI
A
All organisms except some
fungi and bacteria
Produces H2O and CO2
Energy Cell
Used by cell
OxygenNeed to get it from outside cell
Carbon DioxideExcreted out
Water
GlucoseGet from food
The PRODUCTS of one reaction are the REACTANTS of the other reaction.
In which way are photosynthesis and cellular respiration different?A. Cellular respiration stores ATP, while
photosynthesis releases ATP.B. Cellular respiration produces oxygen,
while photosynthesis uses oxygen.C. Photosynthesis releases energy, while
cellular respiration stores energy.D. Photosynthesis uses carbon dioxide,
while cellular respiration produces carbon dioxide.
Anaerobic Respiration (Fermentation)•Does NOT use Oxygen
•Uses ONLY food (glucose) to make ATP
•makes very little ATP
Fermentation (anaerobic respiration) can be…
LACTIC ACID•Occurs in humans
when there is a lack of O2
▫Result of pushing yourself beyond your usual endurance
•Produces lactic acid = muscle cramps
ALCOHOLIC•Occurs in yeast
•Produces CO2 and ethyl alcohol
Which organism is most likely to use anaerobic respiration?
A. BirdB. MossC. TreeD. Yeast
Two different species of bacteria are examined. Scientists find that Species X always produces CO2 and H2O during cellular respiration. Species Y always produces ethyl alcohol and CO2. Which conclusion can be made from these observations?
A. Only Species Y is aerobicB. Only Species Y is anaerobicC. Both Species X and Y are aerobicD. Both Species X and Y are anaerobic.
Bioenergetic ReactionsPhotosynthesisCO2 + H2O → C6H12O6 + O2
Carbon dioxide + water → glucose + oxygen
Aerobic Respiration
C6H12O6 + O2 → CO2 + H2O + 36 ATP
Glucose + oxygen → carbon dioxide + water
Anaerobic Respiration (Alcoholic Fermentation)
C6H12O6 → CO2 + C2H5OH + 2 ATP
glucose → carbon dioxide + ethyl alcohol