chapter 3.3-3.4 photosynthesis and cell respiration guided
TRANSCRIPT
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Chapter 3.3-3.4
Photosynthesis and Cell
Respiration
Guided Notes pp. 86-94
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•Photosynthesis is the process in which a
cell captures energy in sunlight and uses it
to make food (sugars)
•Includes 2 stages:
•1. Capturing of sun’s energy (occurs in
leaves)
•2. Production of sugars (occurs in
chloroplasts)
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Pigment- colored chemical
compounds that absorb light
Chlorophyll- green pigment
that captures sunlight.
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Dioxide water light energy glucose (sugar) oxygen
6 CO2 + 6 H2O yields C6H12O6 + 6 O2
Raw Materials Products
Chlorophyll-
green pigment
Captures Sunlight
Carbon
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Small number- tells you the number of
atoms
Big number- tells you the number of
molecules
Symbol- tells you the kind of element
6 CO2
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CO2 H20 Sunlight
SUGAR
02
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Autotrophs- organism that makes its
own food (plants)
Heterotrophs- organism that does
not make its own food; eats other
organisms to get energy (animal)
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Cellular Respiration is the process in which cells
get energy by breaking down simple foods
(glucose)
Two stages:1.Molecules of glucose are broken
down into smaller molecules (oxygen not involved;
little energy released) Occurs in Cytoplasm
2. Small molecules broken
down further (requires oxygen; releases much
energy –ATP) Occurs in mitochondria
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Chemical Equation
C6H12O6 + 6 O2 6CO2 + 6 H2O + energy (ATP)
Sugar breathe in exhale
(Consume)
ATP is an energy storage molecule that
our bodies use to get energy when
needed.
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Glucose
Oxygen
Smaller
molecules
Energy
Energy
-ATP
Carbon dioxide
water
Mitochondria
cytoplasm
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energy
Complete the diagram showing the relationship between
photosynthesis and respiration.
Powers most cell activity
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•Fermentation is an energy releasing process that
does not require oxygen; releases much less energy
than respiration
Two examples:
•Alcoholic Fermentation is a process that produces
alcohol, carbon dioxide and a small amount of
energy; occurs in yeast and other one-celled
organisms when they break down sugar (baking
bread, brewing alcohol)
2. Lactic Acid Fermentation is a process that breaks
down sugar and produces lactic acid, carbon dioxide
and a small amount of energy; occurs in muscles
when little oxygen is available
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Ch 3.5 Cell Division Guided
Notes- pg.95-100
Cell cycle is the regular sequence of growth and division
that cells undergo for growth, repair and replacement of
cells.. Stage Name Description (in 3 short phrases)
1. Interphase
(period before cell
division)
Cell grows
Makes a copy of its DNA (replication)
Prepares to divide into 2 cells
2. Mitosis
(2nd stage of cell
cycle)
Cell’s nucleus divides into 2 new nuclei
One copy of DNA distributed into each
daughter cell
Divided into 4 parts
3. Cytokinesis
(final stage of cell
cycle)
Cytoplasm divides
Organelles distributed to each 2 new
cells
Completes process of cell division;
forms 2 new daughter cells
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Define each word below that is related to the cell cycle.
A.Chromosome –double rod structure;
contains genes
B.Chromatid-each identical rod in a
chromosome (2 per chromosome)
C.Cell plate—forms across a plant cell,
dividing it into two
D.Centromere-center of a chromosome
Replication-when DNA is copied in a cell
chromatid
centromere
chromosome