UGC NET Questions (Paper – 1)

In the carbon cycle, photosynthesis is the key biological process that takes up carbon dioxide from the atmosphere. Green plants, algae and some bacteria use CO2 and water in the presence of sunlight to produce carbohydrates and release oxygen. The carbon is stored temporarily in plant biomass and, through food chains, in other organisms. Thus, photosynthesis acts as a major carbon sink, making Option C the correct answer.

Option A:
Option A is incorrect because combustion of fossil fuels adds carbon dioxide to the atmosphere. It is a carbon source, not a sink, and contributes to climate change.

Option B:
Option B is incorrect since deforestation removes trees that would otherwise absorb CO2. It reduces the capacity of terrestrial ecosystems to act as carbon sinks and often releases stored carbon when biomass is burned or decomposes.

Option C:
Option C is correct as it points to the primary natural mechanism for withdrawing CO2 from the atmosphere. Protecting and enhancing photosynthetic ecosystems is a key strategy for climate mitigation.

Option D:
Option D is incorrect because volcanic eruptions release gases, including CO2, to the atmosphere. They are natural sources of carbon, not processes that remove it.

A scanner is designed to capture images or printed text and translate them into digital data that a computer can store and process. It uses optical sensors to read the physical document and convert it into a bitmap or similar format. This process is central to digitising paper records and images. Hence, the device described in the stem is a scanner.

Option A:
Option A is correct because standard ICT classifications list scanners as input devices that bring external visual information into the computer system. They play an important role in document management and optical character recognition tasks.

Option B:
Option B, printer, is an output device that produces hard copies of digital documents rather than capturing physical documents into the computer. Its direction of information flow is opposite to what is described.

Option C:
Option C, speaker, outputs audio signals from the computer to the user and therefore cannot be used to input printed text or images.

Option D:
Option D, plotter, produces large-scale drawings or graphics on paper and is considered a specialised output device, not an input device.

Statement C is wrong because research questions do not have to be yes/no questions; they may be descriptive, comparative or explanatory in form. Statements A, B, D and E are correct: questions should be clear, hypotheses testable, vagueness leads to design problems and exploratory work may proceed with questions but no formal hypotheses. Therefore, C alone is the incorrect statement here.

Option A:
Option A is wrong because it combines C with D, even though D accurately highlights that vague questions make it difficult to choose appropriate designs and methods. By classifying D as wrong, this option misrepresents a genuine methodological risk.

Option B:
Option B is incorrect because it labels A, which rightly demands clarity and focus, as wrong along with C. This undermines a basic principle of good research question formulation.

Option C:
Option C is correct because it isolates C as the only statement inconsistent with accepted research practice. It acknowledges the diversity of question forms that can guide inquiry.

Option D:
Option D is incorrect because it pairs C with E, wrongly implying that using questions without hypotheses in exploratory work is a mistake. E is actually a true description of how exploratory studies often proceed.

Ethnography involves prolonged engagement with a cultural or social group, often through participant observation and in-depth interviews. The researcher seeks to understand shared meanings, rituals and patterns of interaction from an insider’s perspective. Thick description of the culture is a hallmark of ethnographic work. Therefore, the immersion-based strategy described in the stem is known as ethnography.

Option A:
Grounded theory aims to generate theory from data through constant comparison and theoretical sampling. While it may involve fieldwork, its primary goal is theory construction rather than rich cultural description. Hence, it is not the correct term here.

Option B:
Option B, ethnography, focuses on culture, social practices and collective meanings. The researcher often lives or spends extensive time in the setting to capture natural behaviour. Because the stem emphasises immersion and shared patterns of behaviour, this option is correct.

Option C:
Narrative inquiry concentrates on people’s stories and how they make sense of experiences through narrative form. It does not require long-term immersion in a culture, so it does not match the description.

Option D:
A case study examines a bounded system such as an organisation or programme in depth. While it may overlap with ethnography, it is not defined primarily by cultural immersion and study of shared patterns, so it is not the best completion.

Each term after the first is obtained by doubling the previous term and subtracting 1. We have 3×2−1 = 5, 5×2−1 = 9, 9×2−1 = 17 and 17×2−1 = 33, confirming the rule. Applying it again gives 33×2−1 = 66−1 = 65. Hence, 65 is the correct next term.

Option A:
Option A is 63, which would require subtracting 3 from 33×2, not 1. The series consistently subtracts 1, so altering that constant is unjustified. Therefore, 63 is incorrect.

Option B:
Option B is 64, implying that we simply double 33 and subtract 2. Such a modification has no support from the earlier steps. Thus, 64 cannot match the pattern.

Option C:
Option C equals 65 and follows the rule 33×2−1 exactly. The extended sequence 3, 5, 9, 17, 33, 65 is perfectly consistent with the defined operation. This makes 65 the valid continuation.

Option D:
Option D is 67, which would result from 33×2+1 and introduces addition instead of subtraction. Since all previous transitions subtracted 1, this change breaks the rule. Therefore, 67 is not appropriate.

Statement D is the only wrong statement because instructional design principles discourage overloading slides with text. Slides should support, not replace, verbal explanation and should be concise. Statements A, B and C correctly describe the benefits and cautions of multimedia use, including combining media types, avoiding overuse of effects and maintaining consistent design. Therefore, the option that chooses only D as wrong is correct.

Option A:
Option A is incorrect because it groups A and D as wrong statements. Statement A is correct in describing how multimedia can integrate different forms of content to enhance understanding. Including this true statement in the wrong set makes the option conceptually unsound.

Option B:
Option B is correct because it isolates D as the sole wrong statement. It acknowledges that text-heavy slides are not recommended and that slides should complement the presenter. By accepting A, B and C as accurate, this option matches good practice in multimedia presentations.

Option C:
Option C is incorrect because it lists A, B and D as wrong statements. Both A and B are valid descriptions of multimedia use and potential distractions. Since only D is actually wrong, this combination misclassifies true statements.

Option D:
Option D is incorrect because it groups B, C and D as wrong statements. Statements B and C are correct in warning against excessive effects and in promoting consistent design. Including them with the false statement D prevents this option from being the right answer.

Noise is defined as any unwanted interference that distorts or obscures the message as it travels through the channel. Loud corridor chatter,traffic or construction sounds can cover parts of the teacher's voice,making the lecture hard to follow. The stem clearly refers to such disturbances,so noise is the correct completion.

Option A:
Feedback is purposeful information about understanding and usually helps improve communication,so it is quite different from unwanted disturbance.

Option B:
Channel is the medium that carries the message,such as air or a sound system,and is not itself the disturbance. A channel may be affected by noise,but the two concepts are distinct.

Option C:
Message denotes the content being taught,not the interfering sounds that disrupt it,so it cannot fill the blank.

Option D:
In communication theory,noise can be physical,psychological or semantic,but in this case it is physical noise affecting hearing. Recognising noise helps communicators take steps like closing windows or using microphones to reduce its impact. This explanation fits Option D exactly.

Intrapersonal communication occurs entirely within a single individual,where that person is both sender and receiver. Silent planning before speaking is a classic example of such inner dialogue. No external audience is directly involved,so the process remains intrapersonal.

Option A:
Intrapersonal communication includes self evaluation,daydreaming and internal rehearsal of messages. These activities shape how one later communicates with others. The stem focuses on exactly this kind of inner planning,making this option appropriate.

Option B:
Interpersonal communication requires at least two distinct people sending and receiving messages,which is not the case when communication happens only inside the mind.

Option C:
Group communication refers to interaction among several individuals,usually to accomplish a task,so it cannot describe solitary thinking.

Option D:
Mass communication involves institutional sources sending messages through media to large,dispersed audiences and is unrelated to private self talk.

Statements A, B and D correctly describe the role of MIS in governance. A is true because MIS tools integrate data to inform decisions about programmes and resources. B is correct since enrolment, performance and financial data allow management to monitor trends and effectiveness. D is also true as reports from MIS help leaders assess progress on strategic plans and quality benchmarks. Statement C is false because data privacy and security are critical when handling personal and institutional information on digital platforms. Thus, A, B and D only are correct.

Option A:
Option A is incorrect because it lists only A and B and omits D, which highlights how MIS outputs are used to follow strategic and quality-related goals. Without D, the link between data and strategic leadership is weakened.

Option B:
Option B is incorrect because it selects B and D only and leaves out A, which sets out the overarching idea of evidence-based decision-making supported by MIS. Excluding A makes the picture less coherent.

Option C:
Option C is correct because it combines all the true statements about MIS roles while rejecting C, which wrongly dismisses privacy and security concerns. It reflects both the utility and the responsibilities associated with digital data systems.

Option D:
Option D is incorrect because it treats every statement as correct, thereby accepting C, which contradicts basic principles of responsible data management.

Statements A, B, C, D and F are correct as they show health impacts, sensitive-zone regulation, sources of noise and technical or planning measures for control. Statement E is false because chronic noise exposure is associated with cardiovascular effects such as hypertension. Therefore, the combination that includes A, B, C, D and F and excludes E is correct.

Option A:
Option A is incorrect because it omits F and so ignores practical approaches to noise control such as silencers, design and enforcement, even though those are essential for mitigation.

Option B:
Option B is incorrect since it leaves out D, underplaying the importance of traffic, construction and industry as major noise sources in urban environments.

Option C:
Option C is incorrect as it omits A, thereby failing to acknowledge the direct hearing damage that can result from high noise exposure, which is a primary concern in noise pollution.

Option D:
Option D is correct because it assembles all true statements about impacts, sources, regulatory tools and control measures, while rejecting the claim that cardiovascular effects are absent.

Statements A, B and C correctly define simple, compound and categorical statements, and E is true about their relevance in symbolising arguments. D is false because compound statements can involve more than two components, such as “p and q and r”. F is false since an atomic statement by definition has no smaller independent statement-parts with their own truth values. Therefore the correct collection of true statements is A, B, C and E only.

Option A:
Option A is incorrect because it includes D, which wrongly restricts compound statements to exactly two components. That restriction does not hold in propositional logic where longer conjunctions and disjunctions are allowed. Hence this option mixes true and false statements.

Option B:
Option B is correct as it gathers all the accurate characterisations and the exam-related remark about symbolisation. It excludes D and F, both of which misrepresent the structure of simple and compound statements. This makes it the only fully consistent combination.

Option C:
Option C is wrong since it omits A, dropping the basic definition of a simple statement, and includes F, which falsely suggests divisibility of atomic sentences. As a result, the option does not contain all true statements and contains at least one false one.

Option D:
Option D is also incorrect because it includes D, preserving the mistaken limit on compound statements, and omits B, losing an essential part of the definition. This prevents the option from being correct.

NEP 2020 encourages schools to offer classical Indian languages and foreign languages as elective subjects so that students can broaden cultural understanding and develop global competencies.

Option A:
Limiting study to English alone goes against the policy’s support for a wide range of languages.

Option B:
This option reflects the NEP view that additional languages, both Indian and foreign, should be available as enriching electives.

Option C:
Making classical languages compulsory for all removes the element of student choice that the policy emphasises.

Option D:
Banning foreign languages would restrict students’ global readiness and conflicts with NEP’s international outlook.

Heat waves and shifting patterns of mosquitoes and other vectors are closely linked to changes in temperature and rainfall patterns. These are direct manifestations of climate change. The stem connects heat stress and vector borne diseases to a type of change,which clearly is climate change. Therefore Option C is the correct choice.

Option A:
Industrial change may alter employment and pollution but does not by itself explain systematic shifts in temperature and disease vectors. It is not the most accurate term here.

Option B:
Demographic change refers to shifts in population size, age and distribution. While these affect vulnerability,they are not the main driver named in scientific assessments for heat stress trends.

Option C:
Climate change alters temperature,precipitation and extreme weather patterns,creating conditions favourable for some vectors and harmful to health. This is exactly the link mentioned in the question.

Option D:
Technological change can influence health through new tools and risks,but it is not the primary cause of the specific trends in heat stress and vector distribution described in the stem.

Noise is any unwanted interference that distorts or obscures the message as it travels through the channel. Static in a microphone changes or masks parts of the teacher's voice. This makes it harder for students to understand,so it clearly functions as noise. The concept comes directly from engineering models like Shannon's.

Option A:
Channel refers to the medium of transmission,such as air or electronic signals,not the distortion.

Option B:
Feedback is the receiver's response,which is purposeful and not random interference.

Option C:
Noise is the interference (static/distortion) that reduces message clarity,so microphone static is noise.

Option D:
Redundancy means deliberate repetition of message elements to improve clarity,rather than accidental distortion.

Semantic barriers arise when sender and receiver attach different meanings to the same word or symbol. The term "assessment" may include quizzes,projects and formative tests,but the student interprets it only as final exams. This mismatch in meaning is a clear semantic barrier.

Option A:
This option is correct because the problem lies in the concept the word refers to,rather than in emotions or environment. Clarifying definitions can remove such semantic barriers.

Option B:
Psychological barriers involve attitudes and emotions such as fear or prejudice,which are not central here.

Option C:
Mechanical barriers come from faulty equipment or physical interference.

Option D:
Cultural barriers stem from differing cultural norms and values,not from misunderstanding a term within the same language community.