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Question Video: Recalling the Process That Autotrophs Use to Synthesize Their Own Food Biology

Which of the following is a process used by some autotrophs to synthesize their own food using light energy? [A] Polymerization [B] Biosynthesis [C] Chemosynthesis [D] Photosynthesis [E] Monomerization

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Video Transcript

Which of the following is a process used by some autotrophs to synthesize their own food using light energy? (A) Polymerization, (B) biosynthesis, (C) chemosynthesis, (D) photosynthesis, or (E) monomerization.

This question asks us about autotrophs and how they get food. “Troph” is a word part that means food. And it is common to hear about both autotrophs and heterotrophs. The word part hetero- means other or different. So heterotrophs feed on other organisms. The word part auto-, on the other hand, means self. So an autotroph is able to produce its own food without relying on the consumption of other organisms. Choices (A), (B), and (E) refer to chemical processes unrelated to autotrophic food production. So we can eliminate these choices.

Chemosynthesis refers to the conversion of chemicals into food. Bacteria living in deep-sea hydrothermal vents are able to do this and are an example of chemoautotrophs. This process has developed among some organisms in such environments that lack light and/or oxygen and where organisms can be subject to immense pressures and temperatures. However, the question asks us about the creation of food using light energy. The word part photo- means light. And this is the process used by some organisms, like plants, to produce food from carbon dioxide and water using light energy. Therefore, the correct answer is (D).

The process used by some autotrophs to synthesize their own food using light energy is photosynthesis.

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