Question

When an electron has been excited to a higher energy state. it can then drop back to the original level, re-emitting the light as fluorescence. When chlorophyll is extracted in solution. and a bright red or blue light is shown on it. The chlorophyll fluoresces brightly. However, when the chlorophyll is packaged inside chloroplasts and the red or blue light is turned on. There is no fluorescence. This most likely indicates that
A. The red and blue light waves are reflected by the chlorophyll membrane
B. Chlorophyll in solution is a different molecule than chlorophyll in a chloroplast
C. excited electrons are transferred to electron acceptors in the chloroplast
D. green light must be used to make living cells fluoresce

Answer 1

Hint: Photosystems are photosynthesis' functional units, defined by a certain pigment organisation and association patterns, whose job is to absorb and transfer light energy, which entails electron transfer. Photosystems are physically present in the thylakoid membranes.

Complete answer:
Light emitted by chlorophyll molecules when they transition from excited to non-excited states is known as chlorophyll fluorescence. It's a photosynthesis energy conversion indicator found in plants, algae, and bacteria.
A light-harvesting complex and a core complex are present in the plant's chloroplast photosystems. Each core complex has a reaction centre containing a photochemically oxidizable pigment (P700 or P680), as well as electron acceptors and donors. These are structured in a way that increases the potential for reduction (tendency to accept electrons). This guarantees that electrons move freely, eliminating the possibility of fluorescence.
'Excited electrons are transmitted to electron acceptors in the chloroplast,' is the right answer.

Note:
Photosystem a photosynthesis energy conversion indicator found in plants, algae, and bacteria. The absorbed light energy is dissipated by excited chlorophyll driving photosynthesis (photochemical energy conversion), as heat in non-photochemical quenching, or as fluorescence radiation emission.