The correct answer is: C. Day and Night
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms’ activities. This chemical energy is stored in molecules of the sugar, glucose.
The process of photosynthesis can be summarized by the following chemical equation:
6CO2 + 6H2O + light energy â C6H12O6 + 6O2
In this equation, six molecules of carbon dioxide (CO2) and six molecules of water (H2O) are combined with light energy to produce one molecule of glucose (C6H12O6) and six molecules of oxygen (O2).
Photosynthesis takes place in two stages: the light-dependent reactions and the Calvin cycle.
The light-dependent reactions take place in the thylakoid membrane of chloroplasts. In these reactions, light energy is used to split water molecules into hydrogen ions (H+) and oxygen gas (O2). The hydrogen ions are then used to produce ATP, a molecule that stores energy. The oxygen gas is released into the atmosphere.
The Calvin cycle takes place in the stroma of chloroplasts. In this cycle, carbon dioxide (CO2) is used to produce glucose (C6H12O6). The Calvin cycle uses ATP and NADPH, which were produced in the light-dependent reactions, to power its reactions.
Photosynthesis is essential for life on Earth. It is the process by which plants produce the oxygen that we breathe and the food that we eat. Photosynthesis also helps to regulate the Earth’s climate by removing carbon dioxide from the atmosphere.
The other options are incorrect because:
- Option A: Photosynthesis does not occur only during the day. It can also occur at night, as long as there is enough light.
- Option B: Photosynthesis does not occur only during the night. It can also occur during the day, as long as there is enough light.
- Option D: Photosynthesis is a real process that occurs in plants and other organisms. It is not a made-up process.