Question

The light reactions of photosynthesis occur in the __________________. During this reaction, _______________ is split to form energy for the Calvin cycle and hydrogen. __________________ is also released. During the dark reactions, or Calvin cycle, __________________ is formed.

Answer 1

Answer:

1. Thylakoid

2. Water

3. Oxygen

4. Glucose

Explanation:

Photosynthesis is a unique process where autotrophs make their own food. It is a metabolic activity that occurs in the Chloroplast. Photosynthesis occurs in two main stages viz: light dependent stage and light-independent stage. The light dependent stage, which occurs in the thylakoid lumen of the CHLOROPLAST. It involves the capturing of light energy from the sun using the Chlorophyll pigment. The Chlorophyll molecule gets excited and the energy derived is used to split water molecule in a process called PHOTOLYSIS OF WATER.

The protons derived from this is used to build a proton pump that will facilitate the synthesis of ATP. A reduced electron carrier (NADPH) is also produced. Oxygen gas is released as a byproduct in this stage.

In the light independent stage, also known as Calvin cycle, the NADPH and ATP produced in the first stage is used to synthesize glucose molecule.