2/10/2014
Monday 2/10 – Biology
Warm-up
1. We must consume food in
order to get energy. List what
foods give us the most energy.
Evolution Exam corrections due
by Friday February 14th
Learning Goal
• Understand the
correlation between
photosynthesis and
cellular respiration,
and describe how
they meet the
energy needs of
both plants and
animals
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Agenda
PHOTOSYNTHESIS
• Photosynthesis
Notes
• POGIL Inquiry
Activity
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Energy Unit
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Energy for Life Process
 Autotrophs-
an organism that uses energy
to synthesize organic molecules from
inorganic substances
 Can
make its own food
 Includes-plants, some bacteria, and algae
Introduction
Photosynthesis: converts sunlight
into food (glucose)
 Heterotrophs
– must obtain energy from
source other than self
 Includes animals, humans, some
plants
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Overall Reaction
6CO2 + 6H2O + light -> C6H12O6 + 6O2
Carbon dioxide + water + light –>
glucose+ oxygen
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2/10/2014
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Happens in…
 Cell
membranes of some bacteria
 Cells
 Xylem
of algae
 Leave
Entry of H2O and CO2 Into the Plant

of plants
 Stomata


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Openings on the leaf that allow gases to move in and out.
Surrounded by guard cells that can open and close as necessary.
Stages of Photosynthesis
Light
Reactions
1.
Captures light energy
from the sunlight and
produces oxygen.
2.
Convert light to chemical
energy (ATP and
NADPH)
3.
Uses chemical energy,
ATP and NADPH, to
create carbohydrates
(glucose) from CO2
Independent
Pathways
The Calvin Cycle
(Dark Reactions)
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A structure in the stem of a plant that moves water from the roots to
the leaves.
Comprehension Check
True or False: Photosynthesis
consists of two independent
pathways
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Comprehension Check
 The primary product
create from the Calvin
cycle is:
A. ADP
B. ATP
C. Glucose
D. All of these
 What
is the by
product created by
the light reaction?
A. Nitrogen
B. Carbon Dioxide
C. Oxygen
D. Helium
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Comprehension Check
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Light Absorption
 Each
 Which pathway
of
photosynthesis is
responsible for
absorbing the waves
of sunlight
A. Light Reaction
B. Calvin Cycle
C. Both of these
D. None of these
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 The Calvin Cycle use
__________ in a
reaction to create
___________.
A. CO2, Oxygen
B. Oxygen, Glucose
C. CO2, ATP
D. CO2, Glucose
Visible Light Spectrum
chloroplast is
made up of different
pigments
 Pigment-a
compound
that absorbs light
 Some pigments
absorb certain
colors more strongly
than others
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Chloroplast Pigments
Chlorophyll a
Only
chlorophyll a is directly
involved in light reaction of
photosynthesis
Chlorophyll
b
helps
to capture light energy
accessory pigment
Carotenoids
accessory
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Carotenoids
Accessory
pigments – help organism
capture more energy
Produce
colors
Mostly
Also
– yellow, orange, red, brown
seen in flowers and fruits
seen during fall when
chlorophyll breaks down
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pigment
Factors Affecting Photosynthesis
 Affected
by plant’s environment
Light intensity
 as light  , photosynthesis  until light
saturation point.
2. Carbon Dioxide
 CO2 , photosynthesis 
3. Temperature
 Chemical reactions general  with
temperature
 If it gets to hot the enzymes can denature and
the reaction 
1.
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POGIL: What’s in a leaf?
in your groups to go
through the inquiry exercise.
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Activity 1: Elodea Lab
Work
All
of the questions can be
answered using the models and
illustrations provided.
Continue the lab
and answer the
analysis questions
For
some of the answers you will
need to THINK!
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Activity 2: Rates of Photosynthesis
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