photosynthesis & cell respiration chapters 8 & 9 miss colabelli biology cpa
TRANSCRIPT
Photosynthesis & Cell
RespirationChapters 8 & 9
Miss Colabelli
Biology CPA
Obtaining Energy Autotrophs
Organisms that get their energy from the sun
Use photosynthesis to make ATP
Ex: plants
Heterotrophs Organisms that get energy from eating
foods
Ex: humans
Why is photosynthesis important?
Makes organic molecules out of inorganic molecules Makes glucose (sugar) from sunlight
It begins ALL food chains and webs Also provides oxygen gas to the
atmosphere
Photosynthesis = “putting together with light” Process that uses sunlight to turn
water and carbon dioxide into glucose
Plants use glucose as food Autotrophs make glucose and
heterotrophs are consumers of it
Overview Two parts to photosynthesis
Light reactions Require sunlight to occur
Creates ATP and NADPH (a different form of energy)
Also makes O2 as a byproduct
Calvin Cycle Does not require sunlight
When CO2, ATP, and NADPH make glucose
6CO2 + 6H2O C6H12O6 + 6O2
Chloroplasts
Parts of the chloroplast Thylakoids
Flattened sacs where reactions occur
Granum A stack of
thylakoids
Stroma Space between the
grana
Light Reactions During light reactions, the plant’s
_________________absorb the sunlight First part of _________________
H2O + sunlight O2
Occurs in the _________________ of the chloroplast
Light Reactions When __________ is split during
these reactions, oxygen gas is made as a _________________
The sunlight is used to break down the water and create ______and _________
Calvin Cycle Second part of _________________
CO2 ______________
Occurs in the _____________ of the chloroplast
Rate of Photosynthesis __________factors that affect the rate
of photosynthesis ____________intensity
_________ ____________ levels
____________
Cellular Respiration Process that our cells use to break down food and
create ______ Takes place in the ____________ Two Parts to Cellular Respiration (when ______ is
present) ____________
____________ Respiration
Two parts to ____________(when O2 is not present) ____________
____________(alcoholic or lactic acid)
C6H12O6 + 6O2 6CO2 + 6H2O + ATP
Glycolysis
Process when glucose is broken down to make ____________ ____________, _______, and ____________
Takes place in the ____________ The pyruvic acid made can either go to
_________________ or ____________ respiration Depends if there is ____________ or not
If there is oxygen present ____________ respiration
If oxygen is not present ____________
Aerobic Respiration
Occurs only in the presence of ____________
Happens in two stages ____________ cycle ____________ ____________ ____________
Occurs in _________________ ____________(cytoplasm in the mitochondria)
Krebs Cycle
Named after scientist ______ ______
Process takes pyruvic acid and makes a molecule called ____________ _______ + ________
Also makes some _______ , _______, _______ These are the needed _______ for the
electron transport chain
Electron Transport Chain
Uses products from the _______ _______ to make a lot of _______ for our cells
Occurs in the mitochondrial ______________ called _________
This process requires __________ in order to work
Fermentation
Process that occurs if oxygen is _______ present
Pyruvic acid will be fixed to become _______ _______ or ___________ (depends on the organism)
Lactic Acid Fermentation
Occurs in our _______ as well as in some _____________ to help make yogurts and cheeses
In our bodies, lactic acid builds up as _______ __________
Alcoholic Fermentation Occurs in organisms such as
__________ This process creates ______ and
__________ __________ If the CO2 is released, you make a
__________ alcohol (wine)
If CO2 is not released, you make a __________ or __________ alcohol (champagne)
Comparing Photosynthesis & Respiration
Photosynthesis Cellular Respiration
Function Energy Breakdown
Location Chloroplasts
Reactants C6H12O6 and O2
Products CO2 and H2O
Equation 6CO2 + 6H2O C6H12O6 + 6O2
C6H12O6 + 6O2
6CO2 + 6H2O