Question

The light reaction during photosynthesis takes place in
A. The outer surface of the chloroplast envelope
B. Stroma
C. Thylakoid membrane
D. The inner surface of the chloroplast envelope

Answer 1

Hint: Photosynthesis is an anabolic process in green plants during which the plant body synthesises its own food material in the presence of sunlight by removing carbon dioxide from the atmosphere and water from the soil.

Complete Answer:
During photosynthesis, the sequence of light phase and dark phase happens. The chloroplast is used both during the light and dark reactions in the chloroplast of photosynthesis. The reactions that take place during the light phase are known as light reactions. Those light reactions are responsible for the formation of high-energy chemical products ATP and NADPH.

In the thylakoid membrane, the light response takes place. Water is oxidised there and oxygen is released. Water-freed electrons are transferred to ATP and NADPH. Outside of the thylakoids, the dark response takes place. The energy from ATP and NADPH is used to replace carbon dioxide in this reaction. Sugar molecules and other organic molecules needed for the function and metabolism of cells are the products of this reaction. Note that in the stroma and the cytoplasm, the dark reaction takes place. During photosynthesis, the light reactions take place in the thylakoid membrane.

The thylakoid membrane is the layer that encloses the thylakoid. The thylakoid membrane is the photosynthesis portion of the location of the light sensitive part. There are two photosystems in the thylakoid membrane that collect light energy. Light is collected and electrons excited by the photosystems, generating energy.

Hence the correct answer is option C.

Note: Within the chloroplasts of the plant cells, you can find stacks of thylakoids called grana. Thylakoids will not necessarily be stacked in certain plant cells. Thylakoids are membrane-bound compartments within chloroplasts. Thylakoids act as the epicentre of photosynthetic light reactions. They produce chlorophyll for a plant that is a light-collecting pigment.