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Sunlight is a form of electromagnetic energy Each type of energy has its own wavelength
and frequency
Gamma radiation is the shortest wavelength, highest frequency and most energy of the EM spectrum.
Radio waves have the longest wavelength, lowest frequency and least energy of the EM spectrum.
Violet color is the shortest wavelength, highest frequency and the most energy of the visible light spectrum.
Red color is the longest wavelength, lowest frequency and least energy of the visible light spectrum.
A substances color is due to chemical compounds called pigments.
Pigments reflect, absorb or transmit light Pigments in the leaf
absorb blue-violet and red-orange light the best. Green light is mostly reflected and transmitted.
A) Absorb lightB) Reflect lightC) Transmit lightD) Give color to substancesE) None of the aboveF) Hi, I hope you had a nice weekend
The action spectrum of photosynthesis shows the wavelengths of light most absorbed by the leaves pigments.
High absorbance/ High rate of PS
Low absorbance/ Low rate of PS
Paper chromatography is a separation technique that allows us to see the pigments in a leaf. Chlorophyll is the main pigment.
A) Determine the wavelengths of light used in photosynthesis
B) Determine the pigments in a leafC) Determine the wavelengths of light
reflected by a leafD) Separate incoming light into
component colorsE) This is not the right answerF) Either is this choice
A) Interior (inside) of the thylakoid, that is the thylakoid space
B) Thylakoid membraneC) StromaD) Intermembrane spaceE) Inner membraneF) Outer membraneG) This is insane in the membrane!
At the heart of the photosystem is the reaction center containing electrons that are waiting to be “excited”.
A) A reaction centerB) ChlorophyllC) StromaD) Helper pigmentsE) Little tiny cameras to take pictures
of photosynthesis as it occursF) The calvin cycle
When sunlight is absorbed, the electrons get “excited.”
An “excited” electron is an electron that has absorbed energy and is now at a higher energy level orbital.
The photosystem “traps” the excited electron.
The electron is transferred to an Electron Transport Chain
The ETC uses the excited electron to make ATP and NADPH.
After the ETC is completed, water is torn apart.
Electrons from water replace the electrons that were excited in the reaction center of the photosystem.
The ATP and NADPH will be used in the calvin cycle to make sugar.
Carbon fixation – converting carbon into a form we can use
Fixation means converting a chemical into a substance we can use
We can not use carbon in CO2, but we can use carbon in sugar
The calvin cycle makes G3P which is only half a sugar.
The calvin cycle must happen six times to make one sugar.
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