Question

How do plants use water in photosynthesis?

Answer 1

Hint: Photosynthesis is the process by which plants use sunlight, water and carbon dioxide to produce and release oxygen and carbohydrates in the form of sugar. The leaves of plants have openings called stomata, which are used for the exchange of gases.

Complete answer:
Water combined with carbon dioxide in photosynthesis is drawn through the stomata. Oxygen is released as a by-product along with water vapour in a process called transpiration.
During photosynthesis, plants take in carbon dioxide and water from the air and soil. In the plant cell, the water is oxidised i.e it loses electrons but the carbon dioxide is reduced i.e it gains electrons. This transforms water into oxygen and carbon dioxide into glucose.
There are many steps behind the photosynthesis but it can be broken down into two major stages: light dependent and light independent. The light dependent reaction takes place within the thylakoid membrane and takes sunlight. The chlorophyll and antenna molecules absorb light energy and convert into ATP and NADPH.
The light independent stage also known as the Calvin cycle takes place in the stroma. It does not require light. During this process energy from ATP and NADPH molecules is used to assemble glucose from carbon dioxide.
Plants obtain water through their roots . Water present in the soil enters the plant through epidermis of the root. 1% of absorbed water is used in photosynthesis.
Six molecules of water and six molecules of carbon dioxide react in the presence of sunlight to form one glucose molecule and six moles of oxygen.

Note:
Plants also need water for photosynthesis. Photosynthesis is the process, plants do create their food and water is critical to this process. The water from the leaves evaporates through the stomata and carbon dioxide enters the stomata. Plants need carbon dioxide to make food