Biology Chapter 9 Photosyntheis
The action spectrum of photosynthesis matched the maximum production of oxygen by Spirogyra, with the greatest accumulation of bacteria in the blue and red regions of the spectrum.
Engelmann concluded that chlorophyll in the chloroplasts is responsible for photosynthesis based on the which of the following results?
(during the) Light dependent reaction(s)
Photosystem I and photosystem II take place during what part of photosynthesis?
porphyrin ring
Which part of the chlorophyll molecule is responsible for absorbing light?
water
What is the ultimate source of electrons for noncyclic electron transport, and thus photosynthesis?
visible uv infrared
What type(s) of wavelengths is emitted by the sun?
orchid
Whats an example of a plant that keeps its stomata open only at night?
(in the) thylakoid membrane
Where is the electron transport chain of photosynthesis located?
Photosystem 1
Which photosynthetic unit consists of a pair of chlorophyll a molecules with an absorption peak of 700nm?
photolysis
Which process not only yields electrons during photosystem I and II, but also is the source of almost all the oxygen in Earth's atmosphere?
gamma (waves)
Which type of electromagnetic waves have the shortest wavelength
they (it) reduce(s) CO2 in the air
Why do algae in our oceans play an important role in climate change?
they are absorbed by chlorophyll more than any other wavelength.
Why does red and blue light support the highest rates of photosynthesis?
pigments
By definition, substances that absorb visible light are called:
stroma
In which part of the chloroplast do the carbon fixation reactions take place?
(during the) light dependent phase
During which phase of photosynthesis is ATP and NADPH synthesized?
magnesium
A chlorophyll molecule has a porphyrin ring containing a single atom of:
granum
A group of thylakoid discs make up what part of a chloroplast?
(from) stroma to thylakoid lumen
A proton gradient is established across the thykaloid membrane when protons diffuse from ________.
hydrogen ions leave
ATP is formed when ____ the thylakoid lumen.
chemiosmosis
ATP synthesis during the light-dependent reactions occurs by which process?
proteins
Each antenna complex absorbs light energy and transfers it to its reaction center, which consists of chlorophyll molecules and ____.
13
How many carbon fixation reactions make up the Calvin cycle?
2
How many electrons are needed to reduce one molecule of NADP+ to NADPH?
13
How many reactions take place during the Calvin cycle?
ATP (and) NADPH
If the energy source for the light-dependent reaction of photosynthesis is sunlight, then what energy is needed to fuel the carbon fixation reaction?
stomata
In C3 plants, the ____ are typically closed at night and open during the daytime to allow for gas exchange.
stroma (in the chloroplast)
The carbon fixation reaction occurs in what part of a chloroplast?
photon
The energy of a(n) ____ is inversely proportional to its wavelength.
CO2
The enzyme rubisco combines ribulose bisphosphate with carbon from what molecule?
chlorophyll
The primary pigment needed for photosynthesis is ________.
(during the) phosphorylation of ADP
The synthesis of ATP during photosynthesis or respiration occurs as a result of what process?
ATP
Thylakoid membranes are involved in ____ synthesis.
light capture, oxidation of water, reduction of NADP+, (and) formation of ATP
What are the major events that occur during the light-dependent reactions of photosynthesis?
photons
What are the packets of kinetic energy in light called?
H2O ADP NADP+
What are the reactants of the light-dependent reactions of photosynthesis?
green
What color does chlorophyll reflect?
photoheterotrophs use light energy but can't carry out carbon fixation
What is a metabolic difference between photoautotophs and photoheterotrophs?
NADPH
What is an end product of photosystem I?
CO2 attaches to RuBP (Ribulose-1,5-bisphosphate)
What is the first step in the Calvin cycle?
stroma
What is the fluid-filled sac within the inner membrane of a chloroplast called?