Plants contain chlorophyll which enable photosynthesis.
Chlorophyll’s job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. There are 2 stages of photosynthesis:
1. The light is converted into two molecules to be used during the second stage of photosynthesis. These two molecules are nicotinamide adenine dinucleotide phosphate (NADPH) and adenosine triphosphate (ATP).
2. Hydrogen atoms from NADPH help to form the glucose, while ATP provides the energy necessary to synthesize it. the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar. Plants use glucose together with nutrients taken from the soil to make new leaves and other plant parts.

Glucose joins with oxygen in respiration. Glucose and oxygen together produce energy, which helps the plant thrive. Carbon dioxide is one byproduct of the respiration process.

Plants use glucose together with nutrients taken from the soil to make new leaves and other plant parts.

Cellulose is the main structural component of plant cells

TO be continued.

All biological molecules (or biomolecules) contain carbon and hydrogen like lipids. Nitrogen is found in amino acids and nucleic bases (the main constituents of proteins and genetic material), in many co-factors and prosthetic groups.

Oxygen is particularly present in carbohydrates and in many functional groups. Phosphorus is involved in the structure of nucleic acids and phospholipids (which play a major structural role in biological membranes) and in the energy metabolism of cells by ADP.

Finally, sulphur is part of the composition of many proteins through two animated acids (cysteine and methionine) where it plays a catalytic or structural role.

The CHNOPS are all of paramount importance in the field of exobiology. CHON are also found in type C asteroids. They are the ones that most frequently collide with the Earth.
Source: Laboratory analysis of CHNOPS (Carbon, Hydrogen, Nitrogen, Phosphorus and Sulphur) by EA-TCD