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Decomposers MCQs for Competitive Exams

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Decomposers MCQs for Competitive Exams

Practice with answers, explanations, and exam-focused revision notes.

22 MCQs Page 2

Topic Notes: Decomposers

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Decomposers MCQs in Environmental Science are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

Attempt the questions page by page, check the correct answers, read the explanations where available, and compare your weak areas with past papers and mock test performance. Consistent MCQ practice improves speed, confidence, and retention for objective exam sections.

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11
Which type of microorganisms are primarily responsible for the aerobic decomposition of organic matter?
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12
Which biological agents are primarily responsible for the mineralization of biomass remaining after the death of algae?
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13
What is the biological process of breaking down organic matter called?
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14
Which group of organisms, alongside fungi, is classified as heterotrophic?
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15
Which of the following organisms are classified as saprotrophs?
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16
Which group of organisms is responsible for breaking down complex organic matter into simple inorganic compounds?
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17
Which type of bacteria can decompose organic matter both in the presence and absence of oxygen?
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18
What does the acronym 'SRB' stand for in environmental microbiology?
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19
Which type of organism is characterized by its ability to respire in the absence of oxygen?
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20
Which organisms are primarily responsible for the production of ammonia during the decomposition of organic matter?
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