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Biology Question 112 – NEET-UG 2023

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The reaction centre in PS II has an absorption maxima at

Recall the two main photosystems involved in the light-dependent reactions of photosynthesis.

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Ninja Strategy•Direct Recall of Photosystem II Characteristics

Knowing the specific absorption maxima for P680 (PS II) and P700 (PS I) allows for direct selection of the correct answer and elimination of others.

Step 1: Identify Photosystem II (PS II) Reaction Center✦ Active

The question asks for the absorption maxima of the reaction center in Photosystem II (PS II), which is a key component of the light-dependent reactions of photosynthesis.

Step 2: Recall Specific Wavelength for PS II○ Expand

The reaction center of Photosystem II is specifically known as P680 because its chlorophyll a molecule absorbs light most efficiently at a wavelength of 680 nm.

💡 Teacher's Secret Hint

Photosystem I (PS I) has a reaction center called P700, absorbing maximally at 700 nm.

Step 3: Select the Correct Option○ Expand

Comparing this fact with the given options, 680 nm is the correct absorption maximum for the reaction center in PS II.

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