Question

In plants, energy is produced during the process of
A. Photosynthesis
B. Transpiration
C. Respiration
D. Water absorption

Answer 1

Hint: It is a series of steps where glucose molecules are broken down to yield a large amount of energy. The protein and fat are also breakdowns to yield energy. The initial stage takes place in the cytoplasm.

Complete answer:
The source of energy required by most of the living organisms depends on the photosynthetic cells. These cells manufacture the complex molecules which are the source of energy. Photosynthetic cells are found in green plants, cyanobacteria and phytoplankton. These organisms prepared their food by the process of photosynthesis. During the process of the photosynthesis, the cell uses carbon dioxide, chlorophyll, water and sunlight to give out the sugar molecules and oxygen. Finally, the cells use these oxygen and glucose molecules to form energy-rich carrier molecules like ATP. This is done by the process of respiration. The carbon dioxide is released as a waste product.

Hence, the correct answer is option (C).

Additional information:
The oxidation of complex molecules leads to the breakdown of C-C bond and due to which cells release a lot of energy. This process is called cellular respiration. The initial step of cellular respiration takes place in the cytoplasm. The process of respiration can be aerobic and anaerobic. In many prokaryotes, fermentation takes place under the anaerobic conditions. In anaerobic (lack or absence of oxygen) condition the lactic acid fermentation or alcohol fermentation occurs. In eukaryotes, the respiration occurs in presence of oxygen called aerobic respiration.

Note: The animals have a special system for the process of breathing or exchange of gases, but plants do not have any special system for breathing or gaseous exchange. In plants, the exchange of gases is done through the stomata and lenticels by diffusion.