MEVE 13 Solved Guess Paper 2026 is a ready revision set of fourteen high probability questions with written answers, built for students sitting the Environmental Biotechnology term end examination of IGNOU's Master of Science (Environmental Science) programme (programme code: MSCENV). Every question in it was chosen after reading six consecutive question papers of this course and marking which topics the examiner keeps returning to.
Five of those fourteen questions are printed in full on this page, answers included, so you can judge the writing quality before you ask for anything. The remaining nine reach you on WhatsApp once you enquire on 9899436384.
MEVE 13 Guess Paper at a Glance
Course, coverage and exam details
- Course: MEVE 13 (also printed as MEVE-013) Environmental Biotechnology
- Programme: M.Sc. Environmental Science, MSCENV, School of Inter-Disciplinary and Trans-Disciplinary Studies
- Questions in the paper: 14 total, 5 shown here, 9 sent on enquiry
- Syllabus coverage: 4 blocks, 17 units
- Papers analysed: 6 sessions, June 2023 to December 2025
- Exam format: 100 marks, 3 hours, answer any ten questions of equal marks
- Target sessions: June 2026 and December 2026
- Enquiry number: WhatsApp 9899436384
Inside the MEVE 13 Solved Guess Paper for 2026
The paper holds fourteen questions with complete written answers, drawn from all four blocks and seventeen units of Environmental Biotechnology. Each question carries a priority label, the block and unit it belongs to, the sessions it last appeared in, and a mark split such as 2+8 or 5+5.
The layout is deliberately repetitive because revision works better that way. Definition first, in the wording the IGNOU book uses. Then the body as numbered points rather than a paragraph, because points are faster to memorise and faster for an evaluator to award marks against. Then a two line conclusion that carries an evaluative edge, which is the part most students skip and most examiners notice.
Where two processes are commonly confused, the answer carries a small comparison table. Activated sludge against trickling filter, in situ against ex situ bioremediation, biofilter against bioscrubber. These are the exact pairs the paper keeps testing together, and a table answers them faster than prose.
If you are building a full revision stack for the session and not only this one course, our wider IGNOU Solved Guess Paper collection covers other codes in the same format, so the answer structure you get used to here carries across.
Sample Questions and Answers from the MEVE 13 Guess Paper
Five of the fourteen questions are reproduced below in full, one from each area of the syllabus, so the quality is visible before you enquire. These five are the complete answers as they appear in the file, not trimmed previews.
Environmental biotechnology, scope and applications
Question: Define environmental biotechnology. Describe the scope and application of environmental biotechnology in environmental clean-up.
Meaning. Environmental biotechnology is an approach of biotechnology for the abatement of different issues of the environment, covering air, water and soil, for the service of mankind.
Major objectives. One, to control contaminants at source before they enter the environment. Two, to remediate contaminants once they have entered the environment by any route. Three, to develop eco-friendly approaches for the testing, analysis and detection of contaminants.
Scope. It is an integrated field drawing on biochemistry, microbiology, environmental engineering, molecular biology and ecology, and its scope runs across environmental safety and sustainable development.
Applications in clean-up. One, bioremediation, where microbes and plants accelerate natural degradation of pollutants in soil and water. Two, waste treatment of wastewater and solid waste through microbial processes. Three, alternative solutions such as biomass energy, biopesticides, biofertilisers and bio-enzymes. Four, pollution control at source and after release. Five, biomonitoring, where biomarkers and bioindicators detect contaminants and assess ecosystem health.
Conclusion. Environmental biotechnology uses microbiology to detect, remediate and monitor contaminants, protecting air, water and soil while supporting sustainable development.
Degradation of cellulose, hemicellulose and lignin
Question: Explain the biodegradation of natural macromolecules, that is cellulose, hemicellulose and lignin, and the micro-organisms involved.
Meaning. Biodegradation is the biologically catalysed reduction in complexity of chemical compounds. When it goes to completion it is called mineralisation.
Cellulose. Cellulose makes up roughly half of all carbon in vegetation and breaks down in three enzymatic steps. Endoglucanases attack cellulose fibrils at random and cut the chains into shorter fragments. Exoglucanases act on the reducing ends to release dimeric units, that is cellobiose. Beta-glucosidase then acts on cellobiose to free glucose monomers.
Hemicellulose. Hemicelluloses are complex mixed polysaccharides built from pentoses and hexoses, running from around fifty to three thousand sugar units. Xylan is the representative polysaccharide and xylanases carry out its degradation.
Lignin. Lignin accounts for close to thirty per cent of organic carbon on Earth. Three enzyme groups break it down, namely manganese peroxidase, lignin peroxidase and laccases. White-rot fungi are notable because they alone can degrade all three wood components.
Conclusion. Cellulose goes through three enzymatic steps, hemicellulose falls to xylanases, and lignin yields to peroxidases and laccases, chiefly through white-rot fungi supported by bacteria and actinomycetes.
Bioremediation of air: biofilter, biotrickling filter and bioscrubber
Question: What is a bioscrubber? Explain biological filtration of air through biofilter, biotrickling filter and bioscrubber, with their advantages and disadvantages.
Meaning. Biofiltration is an air pollution control technology that works through micro-organisms. Depending on the microbial system used, three processes arise, namely the biofilter, the biotrickling filter and the bioscrubber.
The three systems. In a biofilter, polluted air moves through a porous bed of media carrying immobilised micro-organisms that degrade the pollutants. A biotrickling filter improves on this by letting a liquid phase trickle over the immobilised microbes on the packing. A bioscrubber goes further and uses a dispersed or suspended culture instead.
Bioscrubber process. It runs on two units. The first is a scrubber or absorption tower where volatile organic compounds and odorous compounds transfer from air into a water phase. The second is a bioreactor where that water is treated biologically by suspended microbes with aeration. The system suits pollutants that are reasonably soluble in water.
Conclusion. Air pollutants are handled biologically by biofilters and biotrickling filters using immobilised microbes, and by bioscrubbers using suspended microbes across an absorber and bioreactor pair.
Bioplastics, applications and challenges
Question: What are bioplastics? Discuss their applications, advantages and the challenges for bioplastics.
Meaning. Bioplastics are plastics that are bio-based, biodegradable, or both. Bio-based plastics come from biomass and reduce dependence on fossil carbon resources.
Two sustainability concepts. Bioplastics carry biodegradability and renewability together, and offer meaningful carbon dioxide savings against conventional plastics.
Applications. One, packaging, the largest field with close to sixty-five per cent share, covering bags, food packaging, bottles and catering items. Two, consumer electronics and automotive, such as mobile phone casings, car interiors and fuel lines. Three, agriculture and horticulture, including agricultural foils, mulch films and nursery products. Four, medical use, where biodegradable implants made of PLA dissolve in the body. Five, textiles and toys.
Challenges. One, cost, at roughly twice that of conventional plastics. Two, many varieties compost only in industrial high-temperature facilities. Three, they are generally refused by recycling streams and can contaminate them. Four, density is usually higher than polyolefins and the upstream technology is still maturing.
Conclusion. Bioplastics serve packaging, electronics, agriculture and medicine, but cost, restricted composting and recycling difficulty still limit them.
Short notes on bioleaching and biomarkers
Question: Write short notes on the following. (a) Bioleaching (b) Biomarkers in environmental monitoring.
(a) Bioleaching. Recovery processes that use microbial metabolic activity to reach desired products in the form of soluble minerals or metals are called bioleaching. It recovers valuable metals from low-grade ores using microbes as biocatalysts, which is the basis of bio-mining.
The key organisms are Acidithiobacillus ferrooxidans, formerly Thiobacillus ferrooxidans, and Acidithiobacillus thiooxidans. Copper is recovered from lower-grade ore through dump or heap leaching, and the method is not held back by low metal concentrations.
(b) Biomarkers. A biomarker is a xenobiotically induced variation in cellular or biochemical components, processes, structures or functions that can be measured in a biological system or sample.
Biomarkers act as measurable early warning indicators of biological, pathogenic or xenobiotic exposure. The warning arrives long before any effect shows at population or ecological level. In environmental monitoring they detect contamination at the sub-organismic level, which allows action while it still matters.
Conclusion. Bioleaching uses acidophilic microbes to pull metals out of low-grade ores, while biomarkers give measurable early warning of contaminant exposure.
Want the other nine answered questions? Send MEVE 13 on WhatsApp to 9899436384 and our team will share the pricing and the complete file.
Enquire on WhatsApp 9899436384How the MEVE 13 Important Questions Were Selected
Every question was picked by reading six consecutive MEVE 13 question papers, from June 2023 through December 2025, and counting how often each topic reappeared. Topics that surfaced four or more times were tagged high priority. Topics appearing two or three times were tagged medium. Single appearances were tagged low and left as backup.
Frequency alone is not enough though. A topic that appeared in four straight papers and then vanished from the last two is treated differently from one that has appeared in every recent paper. Both patterns matter, because IGNOU rotates topics rather than dropping them, and a gap of two sessions often signals a return.
You can run the same check yourself. The official papers sit on the IGNOU webservices portal, and the course material sits on eGyanKosh under MEVE-013 Environmental Biotechnology. If you prefer to work from the raw papers before deciding what to revise, our IGNOU Previous Year Question Paper section is the faster route to them.
| Topic | Jun 23 | Dec 23 | Jun 24 | Dec 24 | Jun 25 | Dec 25 | Priority |
|---|---|---|---|---|---|---|---|
| Biomarkers, biosensors and monitoring | Yes | Yes | Yes | Yes | Yes | Yes | High |
| Degradation of xenobiotic compounds | No | Yes | Yes | Yes | Yes | Yes | High |
| Cellulose, hemicellulose and lignin degradation | Yes | No | Yes | Yes | Yes | Yes | High |
| Bioremediation, in situ and ex situ | Yes | Yes | No | Yes | Yes | Yes | High |
| Bioleaching, biobleaching and mining | Yes | No | Yes | Yes | Yes | Yes | High |
| Bioremediation of air, biofilter and bioscrubber | No | No | Yes | Yes | Yes | Yes | High |
| Silage and the ensiling process | No | No | Yes | Yes | Yes | Yes | High |
| Phytoremediation, types and mechanism | Yes | Yes | Yes | Yes | Yes | No | High |
| Environmental biotechnology, scope and applications | Yes | Yes | Yes | Yes | No | No | High |
| Solid waste, types and classification | Yes | Yes | No | Yes | Yes | No | High |
| Biofertilisers, types and nitrogen fixation | Yes | No | Yes | Yes | No | Yes | High |
| Biofuels, generations and potential | Yes | No | Yes | Yes | No | Yes | High |
| Greenhouse gas mitigation and carbon sequestration | No | No | No | Yes | Yes | Yes | Medium |
| Nanotechnology in bioremediation | No | No | Yes | No | Yes | No | Medium |
| Biopesticides | No | Yes | No | No | No | No | Low |
MEVE 13 Environmental Biotechnology Blocks and Units
MEVE 13 runs across four blocks and seventeen units, and the guess paper draws from every one of the four blocks. The table below lists the official unit structure alongside the concepts each unit is actually examined on, so you can see where the answered questions sit.
| Block | Unit | Unit title | What the examiner asks from it |
|---|---|---|---|
| Block 1: Overview of Environmental Biotechnology | 1 | Introduction to Environmental Biotechnology | Definition, three objectives, the five clean-up applications, and why the field is called integrated |
| Block 1: Overview of Environmental Biotechnology | 2 | Environmental Biotechnology in Waste Water Treatment | Activated sludge principle, aeration and clarifier stages, trickling filter media and rotary distributor, BOD reduction |
| Block 1: Overview of Environmental Biotechnology | 3 | Environmental Biotechnology for Solid Waste Management | Eight sources of solid waste, classification by hazard, content and origin, the four characteristics of hazardous waste, composting and vermicomposting |
| Block 1: Overview of Environmental Biotechnology | 4 | [VERIFY: confirm Unit 4 title on eGyanKosh before publishing] | [VERIFY: confirm scope of Unit 4 before publishing] |
| Block 2: Biodegradation of Natural Xenobiotic Compounds | 5 | Degradation of Natural Compound | Endoglucanase, exoglucanase and beta-glucosidase steps, xylan and xylanases, manganese peroxidase, lignin peroxidase, laccase, white-rot fungi |
| Block 2: Biodegradation of Natural Xenobiotic Compounds | 6 | Silage Production from Waste | Four ensiling phases, lactic acid bacteria genera, the pH four to five window, clostridia and yeasts as spoilage organisms |
| Block 2: Biodegradation of Natural Xenobiotic Compounds | 7 | Microbes in Greenhouse Gases Mitigation | Carbon sequestration definition, methanotrophs and the methane cycle, carboxylating enzymes, soil management, forests as carbon pools |
| Block 2: Biodegradation of Natural Xenobiotic Compounds | 8 | Biodegradation of Xenobiotic Compounds | Greek roots of the term, recalcitrance and biomagnification, sole carbon source route against co-metabolism, primary against complete biodegradation |
| Block 3: Bioremediation | 9 | Principles of Bioremediation | In situ against ex situ features, bioreactors, slurry, bio-pumping and biopiling, plus microbes, nutrients, moisture and pH as controlling factors |
| Block 3: Bioremediation | 10 | Bioremediation for Soil | Soil clean-up approaches, hyper-accumulator plants, phytomining with Alyssum species, tree species used for contaminated ground |
| Block 3: Bioremediation | 11 | Bioremediation of the Air Environment | Biofilter media bed, biotrickling liquid phase, bioscrubber absorber and bioreactor pair, immobilised against dispersed cultures |
| Block 3: Bioremediation | 12 | Phytoremediation | Six processes from phytosequestration to phytodegradation, the solar-driven pump analogy, hyper-accumulators, commercial readiness |
| Block 4: Ecofriendly Bioprocesses | 13 | Biofuels | Four generations, food crop competition in first generation, lignocellulosic feedstock in second, algal platforms in third, capital cost limits |
| Block 4: Ecofriendly Bioprocesses | 14 | Bioplastics | Bio-based against biodegradable, packaging share, PLA implants, mulch films, industrial composting constraint, recycling stream contamination |
| Block 4: Ecofriendly Bioprocesses | 15 | Biofertilizers | Nitrogen fixing, phosphorus contributing and decomposer classes, free-living against symbiotic against associative, Rhizobium and Azotobacter |
| Block 4: Ecofriendly Bioprocesses | 16 | Mining and Bioleaching | Direct and indirect mechanisms, Acidithiobacillus species, slope, heap and in-situ commercial routes, nutrient limitation in leach liquor |
| Block 4: Ecofriendly Bioprocesses | 17 | Biomarkers | Definition and classification, sub-organismic detection, early warning ahead of population level effects, use in pollution control |
Reading the unit list next to the frequency table tells you something useful. Block 3 and Block 4 between them account for the majority of the repeated questions, while Block 1 supplies the reliable opener that has appeared in four of the six papers. Anyone still working through the source books can pair this with our MEVE 13 Study Material page for the unit-level reading.
Full Question Index of the MEVE 13 Guess Paper
All fourteen questions are indexed below with their block, unit and mark split, and the five marked as shown are the ones printed on this page. Nothing is hidden about what the file contains.
| No. | Question topic | Block and unit | Marks | On this page |
|---|---|---|---|---|
| Q1 | Environmental biotechnology, scope and applications | Block 1, Unit 1 | 2+8 | Shown |
| Q2 | Activated sludge and trickling filter | Block 1, Unit 2 | 2+8 | On enquiry |
| Q3 | Solid waste types and management hierarchy | Block 1, Unit 3 | 2+8 | On enquiry |
| Q4 | Degradation of cellulose, hemicellulose and lignin | Block 2, Unit 5 | 5+5 | Shown |
| Q5 | Silage, ensiling process and microbes | Block 2, Unit 6 | 2+8 | On enquiry |
| Q6 | Microbes in greenhouse gas mitigation | Block 2, Unit 7 | 10 | On enquiry |
| Q7 | Degradation of xenobiotic compounds | Block 2, Unit 8 | 2+8 | On enquiry |
| Q8 | Bioremediation, in situ against ex situ | Block 3, Unit 9 | 2+8 | On enquiry |
| Q9 | Bioremediation of air, biofilter and bioscrubber | Block 3, Unit 11 | 2+8 | Shown |
| Q10 | Phytoremediation, types and mechanism | Block 3, Unit 12 | 5+5 | On enquiry |
| Q11 | Biofuels, generations, potential and limits | Block 4, Unit 13 | 5+5 | On enquiry |
| Q12 | Bioplastics, applications and challenges | Block 4, Unit 14 | 2+8 | Shown |
| Q13 | Biofertilisers, types and nitrogen fixation | Block 4, Unit 15 | 5+5 | On enquiry |
| Q14 | Short notes on bioleaching and biomarkers | Block 4, Units 16 and 17 | 5+5 | Shown |
Five shown plus nine on enquiry gives the fourteen. The nine you do not see here include the two heaviest repeat topics of recent sessions, namely xenobiotic degradation and in situ against ex situ bioremediation, along with silage, phytoremediation, biofuels and biofertilisers.
MEVE 13 Exam Pattern and Marking Scheme
The MEVE 13 term end paper runs for three hours, carries a maximum of 100 marks, and instructs you to answer any ten questions, all carrying equal marks. That instruction is printed on the official papers themselves and has held steady across recent sessions.
Ten questions in one hundred marks means ten marks each, and three hours across ten answers leaves about eighteen minutes per question including reading and planning. In practice you want each answer near the two hundred fifty word mark, which is why the answers in this file are written to that length rather than padded.
There is no compulsory question and no section split. That flexibility is the whole reason a frequency-led guess paper works for this course. Fourteen well-prepared topics comfortably cover the ten you need to attempt, with margin for two or three surprises.
Many questions arrive with an internal split such as 2+8 or 5+5. Students lose marks here more often than anywhere else, by writing a long definition and rushing the eight-mark half. Answer both parts, and label them, so the evaluator does not have to search.
Diagrams help. Activated sludge flow, trickling filter arrangement, the two-unit bioscrubber and the carbon cycle are all quick to draw and reliably rewarded.
Who Should Use This MEVE 13 Guess Paper
It suits MSCENV students who have limited days left, who are reappearing after a backlog, or who have the books but no sense of what actually gets asked. It is a prioritisation tool, not a replacement for the IGNOU study material.
If you have four weeks and you are reading the blocks properly, use this to decide which units deserve the deepest attention. If you have ten days, this becomes your revision spine. If you are reappearing and already know the subject, the frequency table alone will tell you where to aim.
It will not suit you if you want line-by-line coverage of every unit, or if your centre has flagged you for assignment issues rather than exam preparation. Those are different problems and this file does not solve them.
Students taking two or three MSCENV electives in the same session usually ask for a bundle. Our MSCENV Guess Paper listing shows which other codes in the programme are ready in the same format, so you can plan the whole session in one conversation.
Revising with the MEVE 13 Guess Paper in Ten Days
Ten days is enough for MEVE 13 if you work through the fourteen questions in priority order rather than block order. Here is the sequence that has worked for students who came to us late.
Days one to three go to the six topics that appeared in five or six of the last six papers. Biomarkers, xenobiotic degradation, natural compound degradation, bioremediation methods, bioleaching and air bioremediation. Learn the definition word for word, then the numbered points.
Days four to six cover phytoremediation, silage, solid waste, biofuels, biofertilisers and bioplastics. These carry high frequency but slightly more rotation, so aim for solid rather than perfect recall.
Days seven and eight are for writing. Pick four questions at random and write full answers by hand, timed at eighteen minutes each. Reading answers and writing answers are different skills, and only the second one is tested.
Days nine and ten go to the comparison tables, the diagrams and the conclusions. Then leave the rare single-appearance topics alone. Biopesticides and plasmid material appeared once in six papers and are not worth memorising deeply.
How to Get the Complete MEVE 13 Solved Guess Paper
Send a WhatsApp message with your course code to 9899436384 and our team will confirm availability, pricing and delivery for the complete file. The five samples above stay on this page; the other nine answered questions come with the paid file.
Mention MEVE 13 and your session, June 2026 or December 2026, so the right version reaches you. If you need other MSCENV codes in the same session, list them in the same message and we will quote them together.
Delivery is a PDF on the same WhatsApp number you message from, usually the same working day. Doubts after delivery go to the same number, and Sheetal Kirola's team handles the academic queries directly.
MEVE 13 Environmental Biotechnology Guess Paper FAQs
The eight questions students ask most often about the MEVE 13 guess paper, answered plainly. If something you need is not covered here, ask on 9899436384.
How many questions are in the MEVE 13 Solved Guess Paper?
The MEVE 13 guess paper contains fourteen questions with complete written answers. Five of them are printed on this page as samples so you can check the answer quality yourself. The remaining nine reach you as a PDF on WhatsApp after you enquire on 9899436384. All fourteen are mapped to their block and unit, and each carries a priority tag drawn from six sessions of past papers.
Which sessions does the MEVE 13 guess paper target?
This MEVE 13 guess paper is written for the June 2026 and December 2026 term end examinations of Environmental Biotechnology. IGNOU runs only June and December sessions for this course, so one file serves both. The topic selection is based on the six papers held between June 2023 and December 2025, which is the most recent full run of sessions available at the time of writing.
Is the MEVE 13 guess paper based on the official IGNOU syllabus?
Yes. Every answer in the MEVE 13 file is written from the IGNOU MEVE-013 Environmental Biotechnology study material, which is organised into four blocks and seventeen units on eGyanKosh. Questions are mapped unit by unit, so you can trace any answer back to its source reading. Nothing is pulled from outside research that the university has not set for this course.
Does the MEVE 13 guess paper guarantee the same questions in the exam?
No, and any seller claiming otherwise is not being straight with you. The MEVE 13 guess paper is a probability tool built on frequency analysis of six past papers. It tells you which topics IGNOU keeps returning to and which have gone quiet. Given the paper asks you to attempt any ten questions, fourteen well-prepared topics give you a workable margin, not a guarantee.
How is the MEVE 13 Environmental Biotechnology answer written?
Each MEVE 13 answer opens with the definition in the book's own wording, then gives the body as numbered points rather than a paragraph, then closes with a short evaluative conclusion. Answers sit near two hundred fifty words, which is the right length for a ten mark question. Paired topics such as biofilter against bioscrubber carry a small comparison table inside the answer.
What is the exam pattern for MEVE 13 Environmental Biotechnology?
The MEVE 13 paper runs three hours for a maximum of one hundred marks, and the instruction printed on it asks you to answer any ten questions, all carrying equal marks. There is no compulsory question and no separate sections. Many questions arrive with internal splits such as 2+8 or 5+5, and both halves must be answered for full credit on that question.
Can I get MEVE 13 study material and previous year papers as well?
Yes. Alongside the MEVE 13 guess paper we keep previous year question papers and unit-level study material for the same course. Message 9899436384 with everything you need for the session and the team will quote it together rather than one item at a time. Students taking several MSCENV electives usually find this simpler than separate enquiries for each code.
How long does delivery of the MEVE 13 guess paper take?
Once you message 9899436384 on WhatsApp with your course code and session, the team confirms pricing and sends the MEVE 13 file as a PDF, usually within the same working day. Delivery goes to the same WhatsApp number you message from. Academic doubts after delivery go back to that number and are handled by our subject team rather than a general helpdesk.