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azamat
3 years ago
8

In photosynthesis, there are two subunits (photosystem I and photosystem II). These systems occur in the ___________________ mem

branes of the chloroplast. Photosystem I (PS I) and photosystem II (PS II) are _____________________ reactions. A) stroma; light-dependent B) stroma; light-independent C) thylakoid; light-dependent D) thylakoid; light-independent
Biology
2 answers:
erica [24]3 years ago
8 0

Answer:

C) thylakoid; light-dependent

Explanation:

Photosystems are photochemical complexes known as photosystems I and II (PSI and PSII), which despite their spatial separation work in series, through electron transport, to perform the energy storage reactions of photosynthesis. Both can be found in the tilacoid membrane and participate in the clear phase of photosynthesis, that is, they participate in light-dependent reactions.

In photosystem I, chlorophyll a predominates, while in photosystem II, chlorophyll b predominates.

Chlorophyll a, illuminated by sunlight, loses a pair of activated electrons, collected by a special acceptor, ferridoxine. At the same time, chlorophyll b, excited by sunlight, loses a pair of electrons that, after crossing a chain of cytochromes, occupy the "void" left in the chlorophyll a molecule. During the passage of these electrons through the cytochrome chain, there is energy release and ATP (phosphorylation) production. Since the "electron void" of chlorophyll a is not filled by the same electrons that came out of this molecule, the mechanism is called acyclic photophosphorylation.

Kay [80]3 years ago
7 0

Answer

C) thylakoid; light-dependent

Explanation:

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I will give a brainlist for who answers and explains it.
NeTakaya
<span>1. List the adaptation that ALL vertebrates have in common.
The vertebrate is a subphylum of kingdom Animalia. The member of subphylum should have a spine or vertebrae. Therefore, all vertebrates should have vertebrae. All the member should have all the classification above the subphylum like cranium from craniate and notochord from chordate.


2. List all the adaptations that your chordate has (as shown on the cladogram).
The frog is part of Amphibian that shown on green lines. It should have all the organ above its classification such as jaws and paired appendages, lungs(frog can live in the land), four limbs. It also has all the trait of vertebrates that was described above.

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8 0
3 years ago
A botanist is studying the effects of different oomycete species on potato plants. She exposes one set of plants to an oomycete
svlad2 [7]

Answer:

Mortality will be higher in plants exposed to the oomycete species having several AVR proteins.

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The higher the virulence of a viral cell. the higher the number of organisms that that will be infected due to the virulence effect of the virus, and thus the higher the rate of mortality from the death due to the infection.Thus Virulence is directly proportional to mortality of the host due to infection induced by its effects.

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8 0
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