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Biology Chapter 10
Biology Notes for Chapter 10
33
Biology
Undergraduate 1
10/12/2011

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Term
Photosynthesis
Definition
The process that converts solar energy into chemical energy
Term
Autotrophs
Definition
Sustain themselves without eating anything derived from other organisms; producers
Term
Heterotrophs
Definition
Obtain their organic material from other organisms; consumers
Term
Chlorophyll
Definition
The green pigment within chloroplasts
Term
Stomata
Definition
Carbon Dioxide enters and oxygen exits the leaf through microscopic pores
Term
Mesophyll
Definition
The interior tissue of the leaf
Term
Thylakoids
Definition
The chlorophyll is in the membranes of this, (connected sacs in the chloroplast)
Term
Grana
Definition
Stacked thylakoids
Term
Stroma
Definition
A dense fluid
Term
6CO2+ 12 H2O_ Light Energy
Definition
C6H12O6+ 6O2+ 6 H2O
Term
Light Reactions, Calvin cycle
Definition
(The photo part), (the synthesis part)
Term
Light Reactions Job
Definition
Split Water, Release oxygen (O2), reduce NADP+ to NADPH, generate ATP from ADP by photophosphorylation)
Term
Carbon Fixation
Definition
What the Calvin Cycle begins with, incorporating Carbon dioxide into organic molecules
Term
Wavelength
Definition
The distance between crests of waves
Term
Electromagnetic spectrum
Definition
The entire range of electromagnetic energy, or radiation
Term
Visible light
Definition
Consists of wavelengths (including those that drive photosynthesis) that produce colors we can see.
Term
Photons
Definition
Light also behaves as though it consists of discrete particles
Term
Spectrophotometer
Definition
Measures a pigment's ability to absorb various wavelengths
Term
Absorption Spectrum
Definition
A graph plotting a pigment's light absorption versus wavelength.
Term
Chlorophyll A
Definition
Suggests that violet-blue and red light work best for photosynthesis
Term
Action Spectrum
Definition
Profiles the relative effectiveness of different wavelengths of radiation in driving a process
Term
Chlorophyll B
Definition
Broaden the spectrum used for photosynthesis
Term
Carotenoids
Definition
Absorb excessive light that would damage chlorophyll
Term
Photosystem
Definition
Consists of a reaction-center complex surrounded by light-harvesting complexes
Term
Reaction-center complex
Definition
A type of protein complex
Term
Light-harvesting complexes
Definition
Pigment molecules bound to proteins funnel energy of photon to the reaction center
Term
Primary electron acceptor
Definition
In the reaction center accepts an excited electron from chlorophyll a
Term
Photosystem II (PS11)
Definition
Functions first (the numbers relect order of discovery) and is best at absorbing a wavelength of 680 nm
Term
Photosystem 1 (PS1)
Definition
is best at absorbing a wavelength of 700 nm
Term
Linear electron flow
Definition
The primary pathway, involves both photosystems and produces ATP and NADPH using light energy
Term
Cyclic electron Flow
Definition
Uses only photosystem 1 and produces ATP, but not NADPH
Term
Glyceraldehyde-3-phospate
Definition
Carbon enters the cycle as Carbon dioxide, and leaves as a sugar
Term
Calvin Cycle (3 phases)
Definition
Carbon fixation (catalyzed by rubisco), reduction, regeneration of the carbon dioxide acceptor (RuBP)
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