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![Page 1: Go to Section: A Look Into the Future It is 100 years in the future and you are a research scientist. An enormous volcanic eruption has recently sent huge.](https://reader035.fdocuments.in/reader035/viewer/2022070415/5697bf741a28abf838c7fe56/html5/thumbnails/1.jpg)
Go to Section:
A Look Into the Future
It is 100 years in the future and you are a research scientist. An enormous volcanic eruption has recently sent huge quantities of dust and ash into the atmosphere.
Working with a partner, make a list of how this event will affect each of the following:
1. photosynthesis
2. plant life
3. animal life
4. human societies
Section 8-3
Interest Grabber
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Go to Section:
A Look Into the Future
1. photosynthesis
The rate of photosynthesis will decrease due to reduced sunlight.
Section 8-3
Interest Grabber
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Go to Section:
A Look Into the Future
2. plant life
Plants will grow more slowly or die off due to decreased rate of photosynthesis.
Section 8-3
Interest Grabber
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Go to Section:
A Look Into the Future
3. animal life
Animal populations will decrease after a while due to fewer plants for herbivores to eat. Fewer herbivores will eventually result in fewer carnivores. Also, less oxygen will be available.
Section 8-3
Interest Grabber
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Interest Grabber Answers
4. human societies
Human societies will have to adjust their eating habits as some food species die out.
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Go to Section:
8–3 The Reactions of Photosynthesis
A. Inside a Chloroplast
B. Electron Carriers
C.Light-Dependent Reactions
D.The Calvin Cycle
E. Factors Affecting Photosynthesis
Section 8-3
Section Outline
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PHOTOSYNTHESIS
Light-Dependent Reaction
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Click the image to play the video segment.
Video 3
Light-Dependent Reactions, Part 1
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PHOTOSYNTHESIS HAPPENS IN CHLOROPLASTS
• _________________= saclike photosynthetic membranes inside chloroplast
• ____________________ = stack of thylakoids• __________ = space around thylakoid membranes
THYLAKOIDS
GRANUM (pl. grana)
STROMA
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• LIGHT DEPENDENT REACTION• Requires ______________• Happens within________________• Made up of ___________________• Connected by ______________________• Uses light energy to change• ADP + P → _______• NADP+ + H + → _________• Breaks apart ______ molecules and
releases _____________
LIGHT
ATP
THYLAKOID membranes
PHOTOSYSTEMS I & II
ELECTRON TRANSPORT CHAIN
NADPH
H20oxygen
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Go to Section:
Video 4
Click the image to play the video segment.
Chapter 08D.mpg
Video 4
Light-Dependent Reactions, Part 2
Chapter 08D.mpg
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PHOTOSYNTHESIS HAPPENS IN CHLOROPLASTS
• Proteins in thylakoid membrane organize chlorophyll and other pigments into clusters called _____________________PHOTOSYSTEMS
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HIGH ENERGY ELECTRONS require a special carrier, too
• ____________ is one• of the carriers that• cells use to transport• high energy electrons.
NADP+
NADP+________ + _____ + _____ → ____________2 e- H+
_______= nicotinamide adenine dinucleotide phosphateNADP+
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HydrogenIon Movement
Photosystem II
InnerThylakoidSpace
ThylakoidMembrane
Stroma
ATP synthase
Electron Transport Chain Photosystem I ATP Formation
Chloroplast
Section 8-3
Figure 8-10 Light-Dependent Reactions
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Click the image to play the video segment.
Video 5
Calvin Cycle
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• LIGHT INDEPENDENT REACTION• (also called _________________________)
• • DOES NOT require ____________• Happens in ___________
• NADPH donates _______________• ATP donates _________________• CO2 donates
_________________________ • to make __________•
LIGHT
CALVIN CYCLE
ENERGY
STROMA
Hydrogen
Carbon & oxygenGLUCOSE
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Go to Section:
Chloroplast
Light
O2
Sugars
CO2
Light-Dependent Reactions
CalvinCycle
NADPH
ATP
ADP + PNADP+Chloroplast
Section 8-3 Figure 8-7 Photosynthesis: An Overview
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Go to Section:
Photosynthesis
includes
of
take place intakes place in uses
to produce to produce
use
Light-dependentreactions
Calvin cycle
Thylakoidmembranes Stroma NADPHATPEnergy from
sunlight
ATP NADPH O2 Chloroplasts High-energysugars
Section 8-3
Concept Map
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Go to Section:
ChloropIast
CO2 Enters the Cycle
Energy Input
5-CarbonMoleculesRegenerated
Sugars and other compounds
6-Carbon SugarProduced
Section 8-3Figure 8-11 Calvin Cycle
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PHOTOSYNTHESIS OVERVIEW
BIOLOGY; MIller and Levine; Prentice Hall; 2006
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PHOTOSYNTHESIS
Light-Dependent Reaction
Light-Independent
Reactions
Light & Water
Water & oxygen
ATP
NADPH
Carbon Dioxide (CH2O)n
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PHOTOSYNTHESIS
Light-Dependent Reaction
Carbon Fixation
(Calvin Cycle)
Light & Water
Water
ATP
NADH
Carbon Dioxide sugars
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Factors that Affect Photosynthesis
• ____________________• Water is one of the raw materials needed, so a• shortage of water can slow or stop
photosynthesis
AMOUNT OF WATER
http://www.hononegah.org/departments/Anderson/cactus.JPG
Desert plants and conifers that live in dry conditions have a waxy coating on their leaves to prevent water loss.
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Factors that Affect Photosynthesis
• Photosynthesis enzymes function best between 0° C - 35° C
• • At temperatures above
or below this range,• photosynthesis will slow
or stop • • Conifers in winter may
carry out• photosynthesis only
occasionally
TEMPERATURE
http://www.sustland.umn.edu/maint/images/evergreen10.jpg
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Factors that Affect Photosynthesis
• ____________________• More light increases rate of photosynthesis• up to a certain level until plant reaches its• maximum rate of photosynthesis
LIGHT INTENSITY
See effect of light experiment
http://206.173.89.42/REALTYWITHALOHA_COM/piphoto/funny%20sun%20with%20sunglasses.gif
http://www.teachnet.ie/foneill/exper.htm
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SOUTH DAKOTA SCIENCE STANDARDS
• Chapter 8 - Photosynthesis: • The students will be able to:• explain the biochemical processes that a plant
uses in photosynthesis• explain the role ADP-ATP cycle has within the
chloroplast of the cell (9-12.L.1.1)• explain the light reaction (9-12.L.1.1)• explain the steps of photophosphorylation and
the Calvin Cycle (9-12.L.1.1)
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SOUTH DAKOTA CORE SCIENCE STANDARDS
• 9-12.L.1.1. Students are able to relate cellular functions and processes to specialized structures within cells.
• Photosynthesis and respiration• ATP-ADP energy cycle
Role of enzymesMitochondriaChloroplasts
LIFE SCIENCE:Indicator 1: Understand the fundamental structures, functions, classifications, and mechanisms found in living things
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Core High School Life SciencePerformance Descriptors
High school students performing at the
ADVANCED level:
explain the steps of photophosphorylation and the Calvin Cycle;
analyze chemical reaction and chemical processes involved in the Calvin Cycle and Krebs Cycle;
predict the function of a given structure;
High school students performing at the
PROFICIENT level:
describe and give examples of chemical reactions required to sustain life (…role of enzymes)
describe and give examples of chemical reactions required to sustain life (hydrolysis, dehydration synthesis, photosynthesis, cellular respiration, ADP/ATP, role of enzymes);
describe the relationship between structure and function
High school students performing at the
BASIC level
name chemical reactions required to sustain life (… role of enzymes)
name chemical reactions required to sustain life (hydrolysis, dehydration synthesis, photosynthesis, cellular respiration, ADP/ATP, role of enzymes);
recognize that different structures perform different functions;
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SOUTH DAKOTA ADVANCED SCIENCE STANDARDS
• 9-12.L.1.1A. Students are able to explain the physical and chemical processes of photosynthesis and cell respiration and their importance to plant and animal life. (SYNTHESIS)
• Examples: photosystems, photophosphorylation, Calvin Cycle and Krebs Cycle
LIFE SCIENCE:Indicator 1: Understand the fundamental structures, functions, classifications, and mechanisms found in living things.
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Light Dependent reactions Part 1
Light Dependent reactions Part 2
Calvin Cycle
See videoLIGHT-DEPENDENT REACTION