Question

The gas absorbed during photosynthesis is
A. Oxygen
B. Nitrogen
C. Ammonia
D. Carbon Dioxide

Answer 1

Hint: A small amount of carbon dioxide is released during the leaf respiration, but it is quickly reabsorbed. It is a compound that is involved in the synthesis of glucose. It is a byproduct of respiration. It is absorbed by the stomata present in the leaves of plants.

Complete step by step answer: The plants absorb carbon dioxide from the atmosphere during the process of photosynthesis. The photosynthesis is the process by which plants transform light energy into the chemical energy. During this process, in the green plants, the light energy is captured and used to convert water and carbon dioxide and minerals into oxygen and energy-rich organic compounds, i.e. glucose. The process of photosynthesis is critical for the existence of the vast majority of life on Earth. It is the way in which virtually all the energy present in the biosphere becomes available to the living things. As primary producers, the photosynthetic organisms form the base of Earth’s food web and are consumed directly or indirectly by all higher life-forms. The ability to photosynthesize is found in both eukaryotic and the prokaryotic organisms. The most well-known examples are plants. A very few parasitic species also contain chlorophyll and produce their own food. The energy produced by the process of photosynthesis carried out by the plants millions of years ago is responsible for fossil fuels like coal, oil, and gas that power industrial society.
Hence, the correct answer is option D.

Note: Carbon dioxide fixation process differs in C3 and C4 plants. In C3 plants, the carbon dioxide is fixed in the mesophyll cells, whereas in C4 plants, it is fixed mesophyll as well as in the bundle sheath cells.