Environmental Science and Engineering
2023 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE ES 2023 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 16–18 of 65. Imported answers require review unless explicitly marked reviewed.
Question 16
Open questionESMCQ1 markNeeds review
Read the following statements
i. Aerobic heterotrophic bacteria uses organic matter for carbon source and energy source.
ii. Aerobic heterotrophic bacteria uses carbon dioxide for carbon source and energy source.
iii. Aerobic autotrophic bacteria uses carbon dioxide for carbon source and reduced substances for energy source.
iv. Aerobic autotrophic bacteria uses organic matter for getting energy.
The correct choice is
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Open questionESMCQ1 markNeeds review
A student wants to decide electron acceptor for aerobic, facultative and anaerobic bacteria. In this context, read the following statements
i. Dissolved Oxygen (DO) can act as electron acceptor for aerobic bacteria.
ii. Nitrite can act as electron acceptor for aerobic bacteria.
iii. Dissolved Oxygen (DO) can act as electron acceptor for anaerobic bacteria.
iv. Nitrite can act as electron acceptor for facultative bacteria.
The correct choice is
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Which of the following is true according to the Central Pollution Control Board (CPCB), Government of India’s notification issued in the year 2009?
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