The reaction centre PS II has an absorption maxima at
700 nm
660 nm
780 nm
680 nm
The reaction centre known as Photosystem II (PS II) is a crucial part of the photosynthetic process in plants, algae, and cyanobacteria. The absorption maxima of the reaction center refers to the specific wavelength of light that is most effectively absorbed during the photochemical reactions. PS II primarily functions in the light-dependent reactions of photosynthesis, where it captures photons and uses this energy to extract electrons from water molecules, releasing oxygen as a byproduct.
The correct absorption maxima for the reaction centre PS II is 680 nm. Hence, the correct answer is:
680 nm

Which of the following is responsible for the production of oxygen during photosynthesis?
A. Calvin cycle
B. Photolysis of water
C. Cyclic photophosphorylation
D. Reduction of NADP+
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below:
Photosynthesis in higher plants involves the following processes:
This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process: