What are oxygenic photosynthesis, anoxygenic photosynthesis, and rhodopsin-based phototrophy Flashcards
oxygenic photosynthesis.
In plants, algae and cyanobacteria,
end of photosynthesis releases oxygen
photosystem II & I used
Anoxygenic photosynthesis
It is shown by purple bacteria, green sulfur and nonsulfur bacteria, heliobacteria and acidobacteria.
NO oxygen is released
Only one photsystem
Rhodopsin-Based Phototrophy
used by archaea,
without the use of chlorophyll or bacteriochlorophyll
use a bacteriorhodopsin
used in the eyes
Anoxygenic phototrophs have
bacteriochlorophylls, which are pigments that absorb light energy
pigments used in oxygenic phototrophy
Chlorophylls,
carotenoids,
phycobiliproteins
which photosystem does anoxygenic phototrophy have
Photosystem I
Can not have photo system II because it produces oxygen.
This has no oxygen
Rhodopsin-Based Phototrophy relies on what for light absorption
non-chlorophyll based pigment called bacteriorhodopsin
see name in the word.
what is bacteriorhodopsin exactly
pigment used to produce proton motiff force
it is a proton pump
Is there electron transport in rhodopsin phototrophy
No
ATP made from proton force of protons from inside cell go outside cell
What is similar about all three systems
They produce ATP
Proton motif force to make ATP.
The PMF is made differently by each one
prokaryotic organism such as the cyanobacteria does not contain membrane-bound organelles like the chloroplasts. So how do they perform photosynthesis
They have chlorophyll dispersed in the infoldings of the plasma membrane that can perform photosynthesis. Example: Cyanobacteria (blue green algae)
In normal plants, photosynthesis happens in two stages
Calvin cycle and light-dependent reactions in the chloroplast
cyanobacteria uses
oxygenic photosynthesis
All prokaryotic photosynthesizers are anoxygenic.
False
All eukaryotic photosynthesizers are oxygenic.
true
In the process of noncyclic photophosphorylation, ________.
A) water is split to form oxygen gas
B) electrons from water flow through electron transport chains resulting in synthesis of ATP and NADPH
C) photosystems I and II are both required
D) All of the choices are correct.
D–all are correct
In the process of \_\_\_\_\_\_\_\_, ATP is synthesized when excited electrons from chlorophyll P700 pass through a series of electron carriers then return to chlorophyll P700. A) photosynthesis B) cyclic photophosphorylation C) acyclic photophosphorylation D) noncyclic photophosphorylation
B) cyclic photophosphorylation
Photosynthetic electron transport in cyanobacteria takes place \_\_\_\_\_\_\_\_. A) on the plasma membrane B) in the chloroplast C) in the cytoplasm D) on the thylakoid membranes
D) on the thylakoid membranes
what is phototrophy
The ability of the cell/microbe to capture light and use it to synthesize ATP and generate reducing power .
what is photsynthesis
ATP and reducing power derived from light energy and used to reduce and fix carbon dioxide.
It have two parts: light reactions and dark reactions
3 types of phototrophy
oxygenic phototrophy,
anoxygenic phototrophy
rhodopsin based phototrophy.
final electron acceptor for oxygenic photosynthesis.
water
Why is NADPH not produced in the anoxygenic photosynthesis
NADPH is not produced as the electrons are cycled back to the system
in Oxygenated photosynthesis how is ATP produced
noncyclic photophosphorylation
they are cyanobacteria
in AnOxygenated photosynthesis how is ATP produced
cyclic photophosphorylation
they are Purple and green bacteria
Halophilic archea
phototrophic not photosynthesis
metabolism of a chlorophyll–based phototroph. In oxidative phosphorylation during cell respiration, the source of energy is ________ where in photophosphorylation the source of energy is ________.
A) highly reduced organic compounds; light
B) NADH; NADPH
C) electron transport chain; chlorophyll
D) ATP; light
A) highly reduced organic compounds; light
How many molecules of ATP are needed to reduce one molecule of carbon dioxide to carbohydrate by oxygenic phototrophs during the dark reactions of photosynthesis? A) 2 B) 3 C) 4 D) 10–12
3
How many molecules of NADPH are needed to reduce one molecule of carbon dioxide to carbohydrate by oxygenic phototrophs during the dark reactions of photosynthesis? A) 2 B) 3 C) 4 D) 10–12
2
Chlorophyll a and chlorophyll b as well as the accessory pigments are arranged in an antenna array with a reaction center chlorophyll. These antenna arrays with the reaction center chlorophyll are known as \_\_\_\_\_\_\_\_. A) reaction center systems B) photomembrane systems C) photosystems D) Calvin systems
C) photosystems
In what ways are oxidative phosphorylation and photophosphorylation similar?
A) The source of energy is highly reduced organic compounds
B) An electron transport chain is used
C) Proton motive force is generated
D) Water is split to provide electrons
E) ATP synthase enzyme phosphorylates ADP to make ATP
B) An electron transport chain is used
C) Proton motive force is generated
E) ATP synthase enzyme phosphorylates ADP to make ATP
A modified cell membrane that carries out photosynthesis using bacteriorhodopsin in the absence of chlorophyll is called the \_\_\_\_\_\_\_\_ membrane. A) colorless B) orange C) purple D) green
C) purple
Cyanobacteria are so named because many species have a blue-green appearance caused by the photosynthetic pigment phycocyanin.
true
phycocyanin
Some cyanobacteria are not blue-green, rather they are red or brown; this is due to the presence of the photosynthetic pigment ________.
phycoerythrin
Which of the following best describes cyanobacteria?
A) They carry out anoxygenic photosynthesis.
B) They carry out oxygenic photosynthesis.
C) They all can use H2S as a source of electrons for photosynthesis.
D) Their photosynthetic pigments are carried in chlorosomes.
B) They carry out oxygenic photosynthesis.
Although similar to eukaryotic photosynthetic organisms, cyanobacteria are different because they ________.
A) have only photosystem I not photosystem II
B) have only photosystem II not photosystem I
C) do not have chloroplasts
D) do not have any photosynthetic membranes
C) do not have chloroplasts
Cyanobacteria are prokaryotes that carry out oxygenic photosynthesis like green plants; this means that ________.
A) they use water as their electron source
B) they produce oxygen as a by-product of photosynthesis
C) they have two distinct photosystems
D) All of the choices are correct.
all choices correct
Which of the following groups of photosynthetic bacteria are capable of oxygenic photosynthesis? A) The green bacteria B) The purple bacteria C) The cyanobacteria D) All of the choices are correct.
cyanobacteria or blue green
Which of the following are photosynthetic bacteria? A) The green bacteria B) The purple bacteria C) The cyanobacteria D) All of the choices are correct.
all are correct
