Question

Read the assertion and reason carefully to mark the correct option in question.

Assertion: $PSI$ and $PSII$ are named in sequence of their function during the light reaction or photochemical phase.

Reason: Each photosystem has one molecule of chlorophyll a forming a light harvesting complex called antenna.

Answer 1

Assertion reason relation

Pigments, in photosynthesis, are substances that have the ability to absorb light at specific wavelengths. They are located in the thylakoid membrane of chloroplast.

The pigments are organised into $LHC$ (Light Harvesting Complex) and are located within the photosystem I and II. Hence, each photosystem has several pigments.

These photosystems are named based on the sequence in which they were discovered.

Assertion reason relation

In each photosystem, a single chlorophyll a molecule in the centre of photosystem forms the reaction centre.

Reaction centre is surrounded by several accessory pigments also known as antennae, that protect the reaction centre.

Final answer

D) If both assertion and reason are false.