Question

Which one of the following use inorganic compounds as an energy source?

• A. ( Heterotrophs )
• B. ( Chemolithotrophs )
• C. ( Chemoorganotrophs )
• D. ( Photoheterotrophs )

Hint:

Understanding the energy metabolism of different types of organisms can provide insights into their environmental niches and potential applications in biotechnology and environmental management.

Answer 1

The Correct Option is B

The categorization of organisms based on their energy sources is crucial for understanding their ecological roles and metabolic capabilities. Analysis of Each Option: (A) Heterotrophs: Rely on organic compounds for both carbon and energy needs. They do not use inorganic compounds as a primary energy source. 
(B) Chemolithotrophs: Correct. These organisms utilize inorganic compounds as a source of energy. They oxidize inorganic substances such as iron, sulfur, or nitrogen to derive energy. 
(C) Chemoorganotrophs: Use organic compounds for energy, similar to heterotrophs but with a focus on the chemical aspects. 
(D) Photoheterotrophs: Use light for energy but require organic compounds as carbon sources, not utilizing inorganic compounds for energy. Conclusion:
Explanation: Chemolithotrophs are unique in their ability to exploit inorganic chemical reactions to sustain their energy needs, differentiating them significantly from other types listed, which rely on organic compounds or photosynthesis.