Question

The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
A. Magnesium and chlorine
B. Manganese and chlorine
C. Manganese and potassium
D. Magnesium and molybdenum

Answer 1

Hint: Photosynthesis is a process that is used by plants and other organisms to convert light into chemical energy which can be later released to fuel the activities of organisms. The chemical energy associated with this process is stored in carbohydrate molecules like sugar which is synthesized from water and carbon dioxide.

Complete step by step answer:
The photosynthesis process involves the breakdown of the water molecules into hydrogen and oxygen in the presence of sunlight is called photolysis of water. There are various nutrients involved in this reaction like chlorine and manganese. The nutrients help to split water molecules into hydrogen and oxygen molecules. These molecules help the plants to make their own food by special cell organelles called chloroplasts. Therefore, the right combination is chlorine and manganese as they help the plant to break down water molecules, and then these molecules are taken by chloroplast along with sunlight. Potassium element helps as a cofactor for many enzymatic reactions and helps in maintaining membrane permeability. This element also plays an important role in maintaining anion-cation permeability. Molybdenum is a component of enzyme nitrate reductase and plays an important role in nitrogen metabolism. It plays a crucial role in making nitrogen available to plants.
Hence, the correct option is B, i.e., Manganese and chlorine.

Note: Due to the presence of elements like manganese and chlorine the process of photosynthesis can occur. Both elements play an important role in the formation of food with the help of light as they work as a catalyst in order to complete this process.