Here's
your vocabulary.... handed to you
with a
silver spoon. If you see a link by a
definition, USE IT.
biochemical pathway-a series of
chemical reactions that are related; the products of one
reaction become the reactants of the next reaction.
(poster)
(cycle)
(image)
reactants-elements or compounds that
react together to produce a new product/compound.
(explanation)
products-the results of reactants
reacting together in a chemical process. (explanation)
byproducts-products produced by a
reaction that are not needed.
aerobic-
requiring oxygen (ex; aerobic respiration in mitochondrion)
anaerobic-
not requiring oxygen (ex: glycolysis and fermentation)
cellular
respiration-a process; cells
get energy from carbs (sugars); O2 combines w/glucose to
form water and CO2 while ATP is produced.
(image)
energy forms-chemical, light, sound,
kinetic, thermal, electrical
electromagnetic spectrum-a scale of
energy, measuring wavelength strength
(image)
wavelength- the distance from one peak
to the next peak (or from trough to trough) of a wave of
energy.
(image)
[λ-
lambda; a Greek letter used to indicate "wavelength"]
autotroph-makes its own food
heterotroph- must eat (ingest) its own
food
chemiosmosis- a process by which ADP +
P is reassembled to ATP
carbon fixation-Converting atmospheric
carbon (CO2) into an organic molecule
(like
glucose)
(image)
Factors affecting psyn. rate- light
intensity and duration, temperature, amount of water,
and amount of CO2
Leaf parts:
palisade
mesophyll
(or palisade parenchyma)-
tightly packed vertical cells in top portion of leaf profile
(see image below)
spongy
mesophyll
(or spongy parenchyma)
-
loosely packed cells under palisades
stoma-
opening in underside of leaves used for gas exchange
carotene-
pigment used to capture light energy; orange-red in color.
xanthophyll-yellow
pigment
(see more on
pigments)
In the Chloroplast:
(image below)
(details)
photosynthesis-process: light
energy is used to produce chemical energy
in the form of a
sugar; occurs in chloroplasts
chloroplast-organelle
in which photosynthesis occurs
>thylakoid-inner
membrane of chloroplast where the LDR occurs
[granum-
a stack of thylakoids (grana - pl.)]
[chlorophyll-
pigment found in chloroplast's thylakoid membranes
used to capture light energy;
green in color
(image)]
[lumen-fluid
in thylakoid, where the
buildup of H+ occurs.
(image)]
LDR-
light dependent reaction;
occurs in thylakoid mem., needs
light to be activated, produces NADPH and ATP to drive the LIR.
(animation)
[photolysis-
the splitting of water by light energy (in thylakoid)]
>stroma-
fluid surrounding thylakoids in chloroplast
LIR-
light independent reaction; in stroma
fluid; also called
Calvin cycle;
driven by NADPH and ATP from LIR to power cycle. CO2
introduced, final product is
glucose.
(image)
In the Cytoplasm:
(site)
glycolysis-anaerobic process in the
cytoplasm where glucose is split into
2 pyruvic acids; a net
gain of 2 ATP is produced, along with 2 NADH.
(image)
pyruvic acid-
the 3 C compound formed in glycolysis when glucose is
split
In
the Mitochondrion:
(site)
mitochondrion-
organelle where aerobic respiration occurs.
Contains:
cristae-
inner membrane of mitochondrion where the ETC occurs
matrix-
inner fluid of mitochondrion, where the Krebs cycle occurs
Krebs cycle-
process in aerobic respiration; in matrix; produces 2-4
ATP
(watch)
[citric acid- a compound produced in the
Krebs Cycle]
Also in the Cytoplasm:
fermentation-
anaerobic process in the cytoplasm that allows glycolysis to
run,
2 ATP produced.
(image 1)
(image 2)
Two types: Alcoholic and Lactic Acid:
Lactic acid-
a byproduct of Lactic Acid Fermentation;
occurs in our
muscle tissue.
(image)
Ethyl alcohol-
a byproduct of Alcoholic Fermentation;
occurs with yeast and
bacteria.
(image)
Molecules to know:
light
psyn. formula-
6CO2
+ 6H2O
à
C6H12O6
+ 6O2
resp. formula-
C6H12O6
+ 6O2
à
6CO2
+ 6H2O
+
36ATP
ATP Synthase-
an enzyme in the thylakoid membrane (of chloroplast) and cristae
(of mitochondrion);
converts ADP + P to ATP
NADPH-
the power carrying molecule that helps drive the Calvin cycle in
photosynthesis.
ATP
1
ADP + Pi
- Adenosine Triphosphate; the main energy carrying molecule
of respiration; can be used and reused
(reduced to Adenosine Diphosphate)
(image)
NADH
- power molecule used in respiration
(in mitochondrion)
(watch)
ETC -
Electron Transport Chain;
series of proteins and carriers in a membrane that transports
electrons.
Used in thylakoids during LDR and in
mitochondrion's cristae.
CO2 -
1) A source of carbon in photosynthesis,
2) a byproduct of aerobic
respiration,
3)a byproduct of
alcoholic fermentation (which is anaerobic)
O2
- oxygen;
1) a byproduct of photolysis in the LDR,
2) needed in
aerobic respiration
H+ -
a hydrogen ion (a proton); can be obtained from water by
photolysis
e- -an
electron; used to assemble molecules
Fermentation
occurs (in cytosol) when NO O2 present
Sustains
glycolysis: Keeps
2 ATPs
forming from each glucose
Two
types:
○ Alcoholic
ferm.
Some
bacteria, yeast. Byproducts:
Ethyl
alcohol
and
CO2
○ Lactic
Acid ferm.
In your
muscle tissue Byproduct:
Lactic
acid


Contracting
muscles must have ATP, and this comes from four sources:
1. ATP
stored in muscle--exhausted in a few seconds.
2. ATP made from creatine phosphate--also minor, just lasts
10-15 seconds.
3. ATP made from anaerobic breakdown of glycogen (a polymer
of glucose).
4. ATP made from aerobic breakdown of glycogen.
The last two sources of ATP have different
characteristics. Anaerobic breakdown of glycogen is very
fast (maximal power output in about 5 seconds) because few
steps are involved and it doesn't need oxygen from blood.
However, it is inefficient in terms of ATP yield, it creates
lactic acid, which accumulates and eventually causes muscle
fatigue. It depletes muscle glycogen, which may take a day
to recover after exhaustion.
ATP made from aerobic breakdown of glycogen
is slow to get started because it requires 2 - 3 minutes for
blood and oxygen supply to the muscle to increase and for
many enzymes to start operating, but it yields almost 20x as
much ATP per unit glycogen as anaerobic respiration. It also
degrades lactic acid and reconverts it to glycogen,
restoring optimum operating conditions and satisfying oxygen
debt.
Therefore, anaerobic respiration tends
to supply ATP either in sudden, explosive exercise such as
shot-putting, weightlifting, or sprinting, and long-term
exercise is more aerobic. ATP supplied by anaerobic
respiration accounts for different portions of different
track events:
1. 200 m dash (20 sec) is 90% anaerobic.
2. Mile (4 minutes) is 50% anaerobic.
3. 10 km run (29 minutes) is 10% anaerobic.
4. Marathon (2.5 hours) is 2% anaerobic.
The above graphic is a synopsis of respiration.
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