introduction to photosynthesis review. plants “look green” because they _____________ green...
TRANSCRIPT
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Introduction to Photosynthesis
Review
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Plants “look green” because they _____________ green wavelengths of light.
absorb reflect
reflect
Photosynthesis in plants takes place inside which organelle?
chloroplasts
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A _________________ is a molecule (like chlorophyll) that absorbs energy and is used by green plants to absorb sunlight.
Name the two types of chlorophyll
________________ & _________________
pigment
Chlorophyll a Chlorophyll b
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Blue-violet and red wavelengths
Chlorophyll a
Chlorophyll b
Absorption of Light byChlorophyll a and Chlorophyll b
© Pearson Education, Inc. Publishing as
Pearson Prentice-Hall. All rights reserved.
Which wavelengths of light do chlorophyll a and chlorophyll b absorb best?
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Chlorophyll b
Chlorophyll a
Absorption of Light byChlorophyll a and Chlorophyll b
They do not absorb green light.
Which wavelengthof light doesChlorophyll a and chlorophyll b Absorb the least?
© Pearson Education, Inc. Publishing as Pearson Prentice-Hall. All rights reserved.
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Set of chemical reactions in which the product of one reaction goes on to be the reactant in the next reaction
biochemical pathway
Use words to fill in the overall chemical reaction for photosynthesis.
___________+___________ __________ + __________
Carbon dioxide water Sugars oxygen
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Land plants get the carbon dioxide needed for photosynthesis from the ____________(environment)atmosphere
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Name the 2 sets of reactions that make up photosynthesis:
#1 is called ___________________.Light-Dependent Reactions#2 is called ________________.Calvin Cycle
(or Light-independent Reactions)
#1
#2
Photosynthesis
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The main photosynthetic pigment ingreen plants = ___________________
chlorophyll
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TRUE or FALSE
The Calvin cycle requires light.
FALSE: It is light INDEPENDENT
Light-Dependent Reactions break apart ________ and give off _______ gas.water oxygen
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______________ areplant pigments thatare orange or yellowinstead of green
Carotenoids
http://www.rnzih.org.nz/images/gardenimages/carrots_d.jpg
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Molecules that interact in a chemical reaction that are written on the left side of a chemical equation are called ________________reactants
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Reactions of photosynthesis that use light energy to produce ATP and NADPH
Light-dependent reactions
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Pigments that are yellow or orange not green
Clusters of light collectingproteins found in the thylakoidMembrane
carotenoids
photosystems
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Process by which plants and some other organisms use sunlight to convert water and carbon dioxide (CO2) into oxygen (O2) and high energy carbohydrates
PHOTOSYNTHESIS
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6 carbon sugar molecule that isthe main product of photosynthesis
and is used as the fuel burned by cells
glucose
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Negatively charged particle found circling the nucleus of an atom
electron
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Cell organelle containing thylakoid stacks where photosynthesis happens
In which part of photosynthesis is oxygen produced?
chloroplast
Light-dependent reactions
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Molecules that are produced during a chemical reaction that are written on the right side of a chemical equation
products
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Which gas that we need is given offduring photosynthesis?
oxygen
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Label reactants and products for photosynthesis:
#1 = ___________________#2 = ___________________#3 = ___________________#4 = ___________________#5 = ___________________
Carbon dioxide
WATEROXYGEN
SUGARLight energy
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Give the chemical symbol for these
biologically important atoms & ions:
Carbon _____
Hydrogen ____
Oxygen ____
Nitrogen ____
Phosphorus ____
C
H
N
P
O
H+
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What do you think would happen to the rate of photosynthesis on a cloudy day?
It would be slower than on a sunny day
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Which part of photosynthesis can continue at night?
Calvin cycle
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Another name for the Calvin cycle
Light INDEPENDENT reactions
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Write the chemical equation for photosynthesis
___________+___________ → __________ + __________6 CO2 6 O2
6 H2O C6H12O6
Image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006
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How many molecules of CO2 are needed to make 1 molecule of glucose? 6