Chapter 10 - Photosynthesis
Objectives
1.
Distinguish between autotrophic and heterotrophic nutrition.
2.
Distinguish between photosynthetic autotrophs and chemosynthetic autotrophs.
3.
Describe the location and structure of the chloroplast.
4.
Write an equation for photosynthesis.
5.
Describe the absorption spectrum.
6.
List the wavelengths of light that are most effective for photosynthesis.
7.
Explain what happens when chlorophyll or accessory pigments absorb photons.
8.
List the components of a photosystem and explain their function.
9.
Trace electron flow through photosystems II and I.
10.
Compare cyclic and linear (noncyclic) electron flow and explain the relationship between these
components of the light reactions.
11.
Summarize the light reactions and describe where they occur.
12.
Summarize the carbon-fixing reactions of the Calvin cycle.
13.
Describe the role of ATP and NADPH in the Calvin cycle.
14.
Describe what happens to rubisco when the 0
2
concentration is much higher than CO
2
.
15.
Describe the major consequences of photorespiration.
16.
Describe two important photosynthetic adaptations that minimize photorespiration.
17.
Describe the possible fate of photosynthetic products.
Key Words
absorption spectrum
action spectrum
adenosine triphosphate (ATP)
antennae
atom
autotroph
bundle-sheath cell
C3 plant
C4 plant
Calvin cycle/reactions
CAM plant
carbon fixation
Carotenoid
chlorophyll
chlorophyll a
chlorophyll b
crassulacean acid metabolism (CAM)
cyclic electron flow
electromagnetic spectrum
heterotroph
leaf
light-harvesting complex
linear electron flow
light reactions
mesophyll
NADP+/NADPH
photoautotroph
photon
photophosphorylation
photorespiration
photosynthesis
Photosystem I
Photosystem II
primary electron acceptor
producer
reaction center complex
spectrophotometer
stoma
stroma
thylakoid
visible light
wavelength
Outline
A.
Photosynthesis in Nature
1.
Plants and other autotrophs are the producers of the biosphere.
2.
Photosynthesis is a chemical process in which organic compounds are made from carbon dioxide
and water with the help of chloroplasts and light.
This process is carried out by autotrophs.
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