Section: 3.1
Name:
Opening Activity: You do not have a review question since this is the start of a new
unit.
Latin Root Word:
Review of Old Information: None
New Information:
WHY ARE PLANTS GREEN?
CHOLOROPHYLL
-Located in the __________________ membranes
-Chlorophyll have Mg in the center
+
-Chlorophyll pigments harvest ___________________ (photons) by absorbing certain wavelengths (blue420 nm and red-660 nm are most important)
-Plants are green because the green wavelength is _________________, not ____________________.
WHEN DOES IT OCCUR?
-Process begins when pigments ___________________ light.
-Pigment: compounds in ___________________ that absorb
light energy (chlorophyll a & b).
-Different pigments absorb different ______________________ of light across the light spectrum.
-Some pigments absorb colors more strongly than others (chlorophyll a DOES NOT absorb
________________ light).
-REMINDER… the “colors” we see are those __________________ being absorbed.
-Pigments are organized in plants in clusters called Photosystems.
During fall what changes the color of the leaves?
-In addition to the chlorophyll pigments, there are other _________________ present
-During the fall, the green chlorophyll pigments are greatly ________________ revealing the other
pigments
-__________________ are pigments that are either red, orange, or yellow
How Do Cells Use Energy?
Energy for Life on Earth
-___________________ is the ULTIMATE energy for all life on Earth
-Plants _______________ energy in the chemical bonds of ____________
-___________________ energy is released as _________________ during cellular respiration
BIOCHEMICAL PATHWAY: SEE ATTACHED CHART.
STRUCTURE OF ATP
-_ ________ stands for adenosine triphosphate
-It is composed of the nitrogen base ADENINE, the pentose (5C) sugar RIBOSE, and three
________________ groups
-The LAST phosphate group is bonded with a ___________ ______________chemical bond
-This bond can be _____________ to release _____________ for CELLS to use
Activity I:
Using the diagram of the biochemical pathway and prior knowledge on how energy gets
transported from the sun to our bodies, answer the questions on the following page.
!
What is the ultimate source of energy for all living organisms? In other words, where does
the energy begin?
______________________________________________________________________
Organisms that manufacture their own food by photosynthesis are called
__________trophs.
The process that turns the light energy from the sun into chemical energy stored in the
bonds or organic molecules like glucose is called _____________________.
Organisms that cannot manufacture their own food are called __________trophs.
Where do these organisms get the energy they need to survive? In other words, what
process takes the chemical energy we get from eating foods and turns stores it in the
bonds of ATP? _________________
What is the relationship between these two equations?
Photosynthesis: 6CO + 6H O (+ light energy) ! C H O + 6O
2
2
6
12
6
2
Cell Respiration: C H O + 6O ! 6CO + 6H O (+ ATP)
6
12
6
2
2
2
Read pg. 112 -114 and answer the following questions over Light and
Pigments and Chloroplast and Pigments.
Activity II:
1. True or False: The light emitted by the sun is white light.
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