In a bacterial photosynthesis, which of the following is present?

PS- I is present

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PS- II is present

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Both PS- I and PS- II present

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None of the PS are present

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Solution

The correct option is A PS- I is present
There are two types of photosystems, the photosystem I (PS- I) and the photosystem II (PS II). These are the structural and functional protein components in the photosynthesis. The photosytem I is present in the green and purple bacteria that conduct the bacterial photosynthesis where as the photosystem II is present in the cyanobacteria that conduct the normal plant photosynthesis.

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Question 11
The correct sequence of flow of electrons in the light reaction is
(a) PS II, plastoquinone, cytochromes, PS I ferredoxin
(b) PS I, plastoquinone, cytochromes, PS II, ferredoxin
(c) PS I, ferredoxin, PS II
(d) PS I, plastoquinone, cytochromes, PS II, ferredoxin

Q. The sequential order in electron transport from PS II to PS I of photosynthesis is

Splitting of water molecules during light reaction of photosynthesis is associated with

(a) PS I resulting in the release of $O_{2}$ , protons and transfer of electrons to PS II

(b) PS II resulting in release of $O_{2}$ , protons and transfer of electrons to PS I

(d) PS I resulting in the release of $O_{2}$ , protons and transfer of electrons to PS I.

Of the above statements

Q. Read the following statement and select the correct ones.
(i) PS I is involved in non-cyclic photophosphorylation only.
(ii) PS II is involved in both cyclic and non-cyclic photophosphorylation.
(iii) Stroma lamellae membranes possess PS I only, whereas grana lamellae membranes possess both PS I and PS II.

Q. Which "photosynthetic bacteria" possess both PS I and PS II

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