Test Four Lecture #5 Flashcards
Jan Baptista
He weighted plants to see if the amount of soil lost was from the plant and this was not true
Joseph Priestly & Jan Ingenhousz worked together
they did experiments using candles, mice, and plants to see what a plant creates and they discovered that the green parts of the plant do go and create photosynthesis and produce oxygen (they discovered the outcome of photosynthesis)
F.F. Blackman
he found that capturing photosynthetic energy requires sunlight (you need sunlight to create ATP for light dependent reactions); he also discovered that enzymes run the show, not sunlight
C.B. Van Niel
decided that photosynthesis splits water molecules, giving us oxygen gas
Robin Hill
he discovered what carbon fixation is (converting Co2 into an organic molecule)
A ______________ is a particle of light which contains energy and the ____________ the wavelength, the greater its available energy. Fill in the blanks.
Photon; shorter
A beam of light is able to remove electrons from certain molecules creating an electric current called a ________________ and it occurs when photons transfer energy to electrons. Fill in the blank.
photoelectric effect
_______________ is the range of efficiency of photons a molecule is capable of absorbing. Fill in the blanks.
The Absorption Spectrum
How do you know what colors on the visible light spectrum a plant is absorbing without running any type of experiment? (know what we discussed about reflecting and absorbing wavelengths affecting the color of a leaf)
Because what every color is being reflected, than the opposite is being absorbed (If blues and greens are being absorbed, then a reddish color would be reflected)
Pigments are molecules that are good absorbers of light in the visible range. Which pigment within most plants is considered the main pigment that can act directly to convert large quantities of light energy?
Chlorophyll A
According to the video Why Aren’t Plant Black, we know that most plants do not absorb green on the light spectrum. Which statement explains the five hamburger theory which explains why this happens?
More sunlight equals more food; However too much sunlight won’t change anything; full sunlight on a spinach leaf is 3 to 5 times the saturation. It is like being served 3 to 5 hamburgers when your stomach can only fit one
According to the video Why Aren’t Plant Black, we know that most plants do not absorb green on the light spectrum. Which statement explains the greedy hamburglar theory which explains why this happens?
It reflects the green light and cells that are deeper in the plant, absorb the green
According to the video Why Aren’t Plant Black, we know that most plants do not absorb green on the light spectrum. Which statement explains the purple theory that has nothing to do with the hamburgers theory which explains why this happens?
Halobacteria that absorb green and reflect red and blue so it appears purple. If halobacteria were absorbing all the green light, then another green algae that were layers deeper in the ocean would have to make green light.
___________ are pigments which are not always highly efficient in transferring light (they prefer to absorb only blue wavelengths) and are also found in all three domains in life (usually as antioxidants in animals). Fill in the blank.
Caroteniods
Photosystems are composed of two closely linked components. Which statement accurately describes one of those components?
Antenna complex - has hundreds of molecules (like chlorophyll) that gather the energy that it is going to need, then sends it to the reaction center
Reaction center - where all of the information and energy gets passed out, allowing for all of the process to be able to happen
