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Which one of the following is NOT decomposed by bacterial action ?

June 1, 2025 by rawan239

Which one of the following is NOT decomposed by bacterial action ?

Vegetable remains

Plastic materials

Animal carcasses

Wastes of flowers

This question was previously asked in

UPSC CAPF – 2017

Download PDF Attempt Online

The correct option is B.

Bacterial action, along with fungi and other microorganisms, is responsible for the decomposition of organic matter. Vegetable remains (A), animal carcasses (C), and wastes of flowers (D) are all composed of organic materials that are readily biodegradable by bacteria and other decomposers in the environment. Plastic materials (B), on the other hand, are typically synthetic polymers derived from petroleum. Their complex chemical structure makes them resistant to breakdown by most common bacteria and natural decomposition processes, leading to their persistence in the environment.

While some specialized microorganisms or specific conditions can lead to the degradation of certain types of plastics over very long periods, common plastics are largely considered non-biodegradable by typical bacterial action in the environment compared to organic waste.

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