General Studies 2023 GS Paper III 10 marks 150 words Compulsory Discuss

Q6

Discuss several ways in which microorganisms can help in meeting the current fuel shortage. (Answer in 150 words) 10

हिंदी में प्रश्न पढ़ें

उन विभिन्न तरीकों पर चर्चा कीजिए जिनसे सूक्ष्मजीव इस समय हो रही ईंधन की कमी से पार पाने में मदद कर सकते हैं। (उत्तर 150 शब्दों में दीजिए)

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Directive word: Discuss

This question asks you to discuss. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.

See our UPSC directive words guide for a full breakdown of how to respond to each command word.

How this answer will be evaluated

Approach

The directive 'discuss' requires presenting multiple dimensions of how microorganisms address fuel shortage with balanced elaboration. Structure as: brief intro linking microbial biotechnology to energy security → body covering 3-4 distinct microbial applications (biofuels, biogas, microbial fuel cells, biohydrogen) → conclusion on scalability and India's potential.

Key points expected

Biofuel production: microbial fermentation of biomass (lignocellulosic/agricultural waste) to ethanol/butanol; mention Saccharomyces cerevisiae or engineered bacteria
Biogas generation: anaerobic digestion by methanogenic archaea producing methane-rich biogas from organic waste; cite GOBARdhan or village-level biogas plants
Microbial fuel cells (MFCs): direct electricity generation from organic matter using exoelectrogenic bacteria like Geobacter or Shewanella
Biohydrogen production: photobiological or dark fermentation using cyanobacteria/algae/fermentative bacteria as clean fuel alternative
Algal biofuels: third-generation biodiesel from microalgae with high lipid content; mention India's OMEGA programme or IIT research
Synergistic potential: integration with circular economy, waste-to-wealth, and India's net-zero commitments

Evaluation rubric

Dimension	Weight	Max marks	Excellent	Average	Poor
Demand-directive understanding	15%	1.5	Covers multiple distinct microbial pathways (not just listing) with explicit linkage to 'fuel shortage' mitigation; demonstrates awareness that 'discuss' requires elaboration, not enumeration	Mentions 2-3 ways but treats them descriptively without connecting to fuel scarcity context; partial grasp of directive scope	Misinterprets as 'list' or 'define'; focuses on general microbial uses unrelated to energy/fuel; or discusses fossil fuels instead
Content depth & accuracy	25%	2.5	Scientifically accurate mechanisms (fermentation, anaerobic digestion, electron transfer); covers at least 3 distinct fuel types (liquid, gaseous, electrical); includes efficiency/scale considerations	Broadly correct but vague on mechanisms; conflates biofuel types or microbial roles; misses critical technical distinctions	Scientific errors (e.g., confusing photosynthesis with fermentation, wrong organisms); superficial coverage with generic statements
Structure & flow	20%	2	Logical progression: problem → microbial solutions by fuel category → implementation prospects; smooth transitions; 150-word discipline with no abrupt jumps	Identifiable sections but uneven weightage; some repetition or disjointed points; minor deviation from word limit	Rambling or fragmented; no clear thematic grouping; severe under/over-length; illogical sequencing of points
Examples / case-law / data	25%	2.5	Specific Indian initiatives (GOBARdhan, SATAT, OMEGA, IIT-Kharagpur algal research); named organisms (Geobacter, Clostridium, Chlorella); quantitative hint (e.g., biogas potential, blending targets)	Generic references to 'biogas plants' or 'biofuel policy' without specifics; or only international examples without Indian context	No examples; or irrelevant examples (non-microbial fuels like solar/wind); fabricated schemes or organisms
Conclusion & analytical edge	15%	1.5	Forward-looking synthesis: addresses scalability barriers (cost, infrastructure) and India's energy security/Atmanirbhar angle; not mere summary	Standard recap of points without fresh insight; or abrupt ending without conclusion	Missing conclusion; or unrelated moralistic statement; contradicts body content

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