Which of the following processes is used by autotrophs to synthesize organic compounds?

• A. Photosynthesis
• B. Respiration
• C. Glycolysis
• D. Fermentation

Answer: (A)

Verified step by step guidance

1. Understand the role of autotrophs: Autotrophs are organisms that can produce their own food using light, water, carbon dioxide, or other chemicals. They are essential for the conversion of inorganic substances into organic compounds.
2. Identify the process of photosynthesis: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose, a type of sugar. This process involves the transformation of carbon dioxide and water into glucose and oxygen, using sunlight as the energy source.
3. Recognize the chemical equation for photosynthesis: The general chemical equation for photosynthesis can be represented as: $C_6{H}_{12}{O}_6+6O_2=6{\mathrm{CO}}_2+6H_{2}O$
4. Differentiate from other processes: Respiration, glycolysis, and fermentation are processes related to the breakdown of organic compounds to release energy. They are not involved in the synthesis of organic compounds from inorganic materials, which is the primary function of photosynthesis.
5. Conclude the correct process: Based on the understanding of these processes, photosynthesis is the only process among the options that is used by autotrophs to synthesize organic compounds from inorganic substances.