Does photosynthesis require energy? What type of energy reaction would photosynthesis

be? Is photosynthesis an example of a coupled reaction?

What does photosynthesis require ?

Photosynthesis requires light energy which is captured by special pigments, most notably chlorophyll. This energy is used to create energy-rich carbohydrate molecules (sugar and starch) out of carbon dioxide (CO2) and water (H2O). During this process oxygen (O2) is released as a by-product. All the oxygen in the Earth's atmosphere which is used by animals and plants for respiration, originates as a by-product of photosynthesis.

The process may be summed up in the following formula : CO2 + 2H2O >> CH2O + O2 + H2O

Photosynthesis has two major processes
Photosynthesis may be subdivided into two major processes:

The light dependent reactions require sunlight so as to utilise its energy to produce the energy-rich molecules ATP and NADP. This phase of photosynthesis is also known as the light phase as it requires light energy.

The light independent reactions utilise the energy-rich molecules ATP and NADP which were produced in the light phase. The ATP and NADP are used to produce energy-rich carbohydrate molecules (simple sugars) which can be stored and used as a basis for all other forms of organic molecules. This phase of photosynthesis is also known as the Calvin cycle or dark phase as it does not require light energy.

To sum it up. Yes it requires energy and yes it is a coupled reaction.

tnx

Yes, photosynthesis does require energy. It is an endothermic chemical reaction, meaning that it needs energy to occur. Specifically, photosynthesis uses light energy from the sun to drive the reaction.

Photosynthesis is an example of a coupled reaction. It involves two main reactions: the light-dependent reactions and the light-independent reactions (also known as the Calvin cycle). In the light-dependent reactions, light energy is absorbed by chlorophyll in the chloroplasts of plants, which is then used to generate ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate). These energy-rich molecules are then utilized in the light-independent reactions to convert carbon dioxide into glucose, a process called carbon fixation. The coupling of the light-dependent and light-independent reactions ensures that energy captured from light is ultimately used to produce glucose.

Yes, photosynthesis does require energy. It is a process by which green plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose (a form of stored chemical energy) and release oxygen as a byproduct.

Photosynthesis can be described as an endothermic (energy-absorbing) reaction because it requires energy input in the form of sunlight. The chlorophyll pigments in the chloroplasts of plant cells absorb light energy and convert it into chemical energy through a series of complex reactions.

In terms of being a coupled reaction, photosynthesis is an example of a coupled reaction. A coupled reaction is a chemical reaction where the energy released from one reaction is used to drive another reaction. In photosynthesis, the energy absorbed from sunlight during the light-dependent reactions is used to fuel the synthesis of glucose during the light-independent reactions (also known as the Calvin cycle). This coupling enables the production of glucose through the conversion of carbon dioxide and water.