Multiple choice

Directions: Fill in all the four blanks -1, 2, 3, and 4.

In PS I, the reaction centre chlorophyll has an absorption peak at __1_ hence, is called __2, while in PS II, it has absorption maxima at __3, and is called ___4.

  1. 1 - 700nm, 2 - P700, 3 - 680nm, 4 - P680

  2. 1 - 1700nm, 2 - P1700, 3 - 1680nm, 4 - P1680

  3. 1 - 700, 2 - P700nm, 3 - 680, 4 - P680nm

  4. 1 - P700, 2 - 700nm, 3 - P680, 4 - 680nm

  5. 1 - 70nm, 2 - P70, 3 - 68nm, 4 - P68
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The LHC is made up of hundreds of pigment molecules bound to proteins. The single chlorophyll molecule forms the reaction centre. The reaction centre is different in both the photosystems. In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm, hence is called P700, while in PS II it has absorption maxima at 680 nm, and is called P680.

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