Learn 79 questions from K-TET III - September 2021 - Part III (Natural Science)

K-TET III - September 2021 - Part III (Natural Science) Questions

Ecoclines are intermediate forms found in the transitional regions between two adjacent regions occupied by separate ecotypes of a species. They represent a zone of gradual but continuous change in species characteristics or environmental conditions across a geographic gradient. This contrasts with ecads, ecosystem species, and coenospecies, which have different ecological meanings.

<ul style="color: rgb(255,255,255);"><li>Histones are basic proteins found in eukaryotic cells that package and order DNA into structural units called nucleosomes.</li><li>A nucleosome, the fundamental structural unit of chromatin, consists of a core particle around which DNA is wrapped.</li><li>The histone core particle is composed of eight histone proteins: two copies each of H2A, H2B, H3, and H4. This assembly of eight histone molecules is referred to as an **octamer**.</li><li>The DNA double helix wraps approximately 1.65 times around this histone octamer, forming a nucleosome core.</li><li>This structure is crucial for the compaction of the vast length of DNA within the nucleus of a cell.</li><li>Each DNA-protein unit formed by a nucleosome and its associated linker DNA is called a nucleosome filament or string of beads.</li><li>In terms of competitive exams, understanding the composition of the nucleosome, particularly the number and types of histone proteins involved, is frequently tested.</li><li>The term 'histone' originates from their isolation with the nucleus, first described by Albrecht Kossel in 1884.</li><li>Histones play a vital role in gene regulation by influencing DNA accessibility to transcription factors and other regulatory proteins.</li></ul>

Each turn of the two polypeptide chains contains 12 base pairs.

Distance between two subsequent base pairs is 3.7 A.

The distance between axis and sugar phosphate is 10 Å.

Alternate deoxyribose sugar units in the polynucleotide chain have inverse orientation,

<ul style="color: rgb(255,255,255);"><li>The QRS complex on an electrocardiogram (ECG) is a crucial component that signifies a significant event in the cardiac cycle.</li><li>It specifically represents the depolarization of the ventricles, which are the heart's lower chambers responsible for pumping blood to the rest of the body.</li><li>Ventricular depolarization is the electrical event that leads to the contraction of the ventricles, a process known as ventricular systole.</li><li>The P wave on an ECG precedes the QRS complex and represents the depolarization of the atria (upper chambers of the heart).</li><li>The T wave, which follows the QRS complex, represents the repolarization of the ventricles, where the heart muscle cells recover electrically.</li><li>Abnormalities in the QRS complex, such as widening or increased amplitude, can indicate various cardiac conditions, including ventricular hypertrophy, myocardial infarction, or bundle branch blocks.</li><li>In competitive exams, understanding the sequence and meaning of ECG waveforms (P wave, QRS complex, T wave) is vital for diagnosing and interpreting cardiac abnormalities.</li><li>The duration of the QRS complex is typically between 0.06 to 0.10 seconds. A QRS duration longer than 0.12 seconds often suggests a conduction delay within the ventricles.</li><li>The electrical activity captured by the QRS complex is the sum of the electrical potential of all ventricular cells, making it the largest and most prominent deflection on a standard ECG.</li></ul>

Inflammation of cornea due to high dose of UV-B radiation

Damage of retina caused by infra-red rays

freezing of fluids in the eyes by low temperature

To encourage and enable students to develop inquiring minds and curiosity about nature

To train students to perform well in science fair and exhibitions

To acquire knowledge ,conceptual understanding and skills to solve problems and make informed decisions

To develop skills to design and carry out scientific investigations and evaluate scientific evidence to draw conclusions

Partial pressure of CO₂ can interfere in O, binding with haemoglobin

Higher H concentration in alveoli favours the formation of oxyhaemoglobin

Low pCO₂, in alveoli favours the formation of oxyhaemoglobin of oxygen with haemoglobin is mainly related to

Seminal vesicles, Prostate, Bulbourethral glands

Scrotum, Seminal vesicles, Bulbourethral glands

marks obtained in examination are included

Students build knowledge with the help of teacher

teacher has a dominant role in students learning

Serosa is the innermost layer of the alimentary canal

<ul style="color: rgb(255,255,255);"><li>Dr. V.S. Ramachandran is a renowned neurologist and cognitive scientist, widely recognized for his groundbreaking work in the field of neuroscience.</li><li>The book "The Tall Tale Brain" (though more commonly known by its original title Phantoms in the Brain: Probing the Mysteries of the Human Mind) explores fascinating neurological phenomena.</li><li>Ramachandran's research often focuses on phantom limbs, synesthesia, and the neurological basis of consciousness and self-awareness.</li><li>His work has significantly contributed to understanding how the brain constructs our perception of reality and the self.</li><li>Dr. Ramachandran has held prestigious positions at various institutions, including the University of California, San Diego (UCSD), where he founded and directs the Center for Brain and Cognition.</li><li>He is a prolific author and has received numerous awards and honors for his scientific contributions.</li><li>His accessible writing style makes complex neurological concepts understandable to a broader audience, making his books valuable resources for students and enthusiasts alike.</li><li>His research often involves innovative experimental techniques and interdisciplinary approaches, combining psychology, linguistics, and philosophy with neuroscience.</li><li>The insights provided in his books are often relevant to understanding psychological disorders and the workings of the human mind in general, a common area of interest in various competitive exams related to psychology and general awareness.</li></ul>

<h4 style="color: rgb(255,255,255);">UNESCO's 'Education for All' (EFA) Initiative</h4>
<ul style="color: rgb(255,255,255);">
<li>The 'Education for All' (EFA) initiative was a global commitment launched in Dakar, Senegal in 2000, with the goal of making quality primary education a reality for all children and adults by 2015.</li>
<li>It was spearheaded by UNESCO and six other agencies: UNICEF, UNDP, UNFPA, UNHCR, the World Bank, and UN Women.</li>
<li>The core principle of EFA is the right to education for every individual, regardless of their background, gender, socio-economic status, or location.</li>
</ul>
<h4 style="color: rgb(255,255,255);">Key Goals of the EFA Movement</h4>
<ul style="color: rgb(255,255,255);">
<li>Expanding Early Childhood Care and Education: Ensuring that all young children have access to quality early childhood development programs.</li>
<li>Universal Primary Education: Making sure all children complete a full course of primary schooling.</li>
<li>Adult Learning and Skills: Promoting learning opportunities for adults to acquire literacy and essential life skills.</li>
<li>Gender Equality in Education: Eliminating gender disparities in education at all levels.</li>
<li>Quality of Education: Improving all aspects of the quality of education, ensuring that everyone achieves measurable learning outcomes.</li>
<li>Education in Emergencies: Providing education in crisis-affected areas and promoting peace through education.</li>
</ul>
<h4 style="color: rgb(255,255,255);">Focus on Disadvantaged Groups</h4>
<ul style="color: rgb(255,255,255);">
<li>A significant aspect of the EFA movement was its emphasis on reaching the most marginalized and disadvantaged populations.</li>
<li>This includes children in poverty, girls, ethnic minorities, children with disabilities, refugees, and those living in remote or conflict-affected regions.</li>
<li>The aim was to remove barriers that prevent these groups from accessing and benefiting from education.</li>
</ul>
<h4 style="color: rgb(255,255,255);">Relevance to Competitive Exams</h4>
<ul style="color: rgb(255,255,255);">
<li>Understanding global educational initiatives like EFA is crucial for exams focusing on education, social justice, and international development.</li>
<li>Questions may test knowledge of the specific goals, participating organizations, and the underlying philosophy of ensuring equitable access to education.</li>
<li>The EFA goals have influenced national education policies and international aid strategies worldwide.</li>
</ul>

ensuring access to education for everyone, especially the most disadvantaged

improving infrastructure facilities of school

<ul style="color: rgb(255,255,255);"><li>Discovery Learning, a cognitive theory by Jerome Bruner, emphasizes students actively constructing their own knowledge through exploration and problem-solving.</li><li>Bruner believed that learning is an active process where individuals discover key ideas and principles for themselves, rather than passively receiving information.</li><li>This approach aligns with constructivist learning theories, which posit that learners build understanding from their experiences.</li><li>A core principle of Bruner's theory is the concept of enactive, iconic, and symbolic representation, suggesting that learners progress through different modes of understanding concepts.</li><li>The theory advocates for presenting concepts multiple times, with increasing complexity and abstraction, allowing students to revisit and deepen their understanding iteratively.</li><li>Discovery learning is often contrasted with expository teaching (traditional lecture-based methods) and emphasizes the 'how' and 'why' of learning.</li><li>This method is particularly effective for developing critical thinking, problem-solving skills, and intrinsic motivation in students.</li><li>In competitive exams, understanding Bruner's Discovery Learning is crucial for questions related to constructivism, cognitive development, and effective teaching methodologies.</li><li>Key terms associated with Bruner include: 'spiral curriculum' (revisiting topics), 'readiness for learning' (presenting material at the appropriate developmental stage), and the three modes of representation.</li></ul>

<h3 style="color: rgb(255,255,255);">The Scientific Method: A Systematic Approach</h3><h4 style="color: rgb(255,255,255);">Understanding the Steps</h4><ul style="color: rgb(255,255,255);"><li>Sensing the Problem (iv): This initial stage involves recognizing that a problem or phenomenon exists, often through observation or curiosity. It's the spark that ignites the scientific inquiry.</li><li>Defining the Problem (i): Once a problem is sensed, it needs to be clearly and precisely defined. This involves formulating a specific question that the research aims to answer. A well-defined problem is crucial for guiding the entire investigation.</li><li>Proposing a Tentative Solution (Hypothesis) (iii): Based on existing knowledge and the defined problem, a possible explanation or prediction is formulated. This is known as a hypothesis. It's a testable statement that offers a potential answer to the research question.</li><li>Collecting Data (vi): This is the experimental phase where relevant information is gathered to test the hypothesis. This can involve experiments, surveys, observations, or reviewing existing literature. Careful and accurate data collection is vital for reliable results.</li><li>Analyzing Data (ii): Once data is collected, it needs to be organized, summarized, and analyzed to identify patterns, trends, and relationships. Statistical methods are often employed during this stage to interpret the findings objectively.</li><li>Drawing Conclusion (v): Based on the data analysis, a conclusion is drawn about whether the hypothesis is supported or refuted. This step involves interpreting the results in the context of the original problem and may lead to further research or refinement of the hypothesis.</li></ul><h4 style="color: rgb(255,255,255);">Key Aspects for Competitive Exams</h4><ul style="color: rgb(255,255,255);"><li>The scientific method is a cornerstone of empirical research across various disciplines.</li><li>Understanding the logical sequence of these steps is often tested in competitive exams that cover general science, research methodology, or specific subject areas.</li><li>The ability to differentiate between sensing a problem and defining it, or between proposing a hypothesis and drawing a conclusion, is frequently assessed.</li><li>Memorizing the order and purpose of each step is essential for answering questions related to experimental design and scientific inquiry.</li></ul>

<h4 style="color: rgb(255,255,255);">Understanding the Pillars of Learning:</h4><ul style="color: rgb(255,255,255);"><li>The concept that every individual possesses latent abilities like memory, reasoning, and imagination is fundamentally linked to the **'Learning to Know'** pillar of education.</li><li>This pillar emphasizes the development of cognitive skills, the ability to acquire knowledge, and the capacity for critical thinking and problem-solving.</li><li>It encourages learners to understand themselves and their potential, fostering intellectual curiosity and the pursuit of knowledge for its own sake.</li><li>Contrast this with other UNESCO pillars of learning:</li><ul style="color: rgb(255,255,255);"><li>'Learning to Do': Focuses on vocational skills and practical application of knowledge.</li><li>'Learning to Live Together': Emphasizes social skills, cooperation, and understanding diverse perspectives.</li><li>'Learning to Be': Aims at holistic personal development, encompassing intellectual, emotional, physical, and ethical growth.</li></ul><li>The recognition of hidden talents aligns directly with nurturing the intellectual capacity to 'know' and to continuously learn and grow.</li><li>This understanding is crucial for educators in designing curricula that cater to diverse learning styles and encourage the discovery and development of individual strengths.</li></ul><h4 style="color: rgb(255,255,255);">Relevance in Competitive Exams:</h4><ul style="color: rgb(255,255,255);"><li>Questions on the pillars of learning are common in examinations related to education, teaching methodologies, and psychology.</li><li>Understanding the nuanced distinctions between these pillars is key to accurately answering questions that assess pedagogical principles.</li><li>For instance, a question probing the development of analytical skills would point towards 'Learning to Know', while one about teamwork would indicate 'Learning to Live Together'.</li></ul>

<ul style="color: rgb(255,255,255);"><li>Critical Pedagogy: This educational philosophy, heavily influenced by thinkers like Paulo Freire, views education as a practice of freedom and a tool for social transformation. It challenges traditional, authoritarian models of teaching and learning.</li><li>Learner-Centric Approach (Statement i): Critical pedagogy strongly emphasizes that the lived experiences, cultural backgrounds, and personal perceptions of learners are fundamental to the learning process. It values what students bring to the classroom.</li><li>Rejection of Traditional Teacher-Centric Model (Statement ii): This statement describes the *traditional* banking model of education, which critical pedagogy explicitly critiques and seeks to dismantle. In critical pedagogy, teachers are facilitators and co-learners, not just dispensers of information, and students are active constructors of knowledge, not passive recipients. Therefore, this statement is **incorrect** as a description of critical pedagogy itself.</li><li>Addressing Social Inequalities (Statement iii): Critical pedagogy is deeply concerned with social justice and aims to expose and challenge oppressive structures and inequalities based on class, race, gender, and other social categories. It seeks to empower students to become agents of social change.</li><li>Key Figures in Critical Pedagogy: Understanding key figures like Paulo Freire (author of Pedagogy of the Oppressed), Henry Giroux, bell hooks, and Peter McLaren is crucial for competitive exams. Their works often form the basis of questions.</li><li>Exam Relevance: Questions on critical pedagogy in competitive exams often test the understanding of its core tenets, its contrast with traditional teaching methods, and its focus on social justice and emancipation.</li></ul>

<h4 style="color: rgb(255,255,255);">Symposium as a Teaching-Learning Method</h4>
<ul style="color: rgb(255,255,255);">
<li>Definition: A symposium is an academic method of teaching and learning that involves a structured discussion on a particular topic.</li>
<li>Key Features:</li>
<ul style="color: rgb(255,255,255);">
<li>It typically involves a panel of speakers, each presenting a different aspect of the topic.</li>
<li>Followed by a question-and-answer session involving the audience.</li>
<li>Promotes active participation and critical thinking among students.</li>
<li>Encourages the exchange of diverse viewpoints and deeper understanding of a subject.</li>
</ul>
<li>Objectives:</li>
<ul style="color: rgb(255,255,255);">
<li>To explore a topic comprehensively from multiple perspectives.</li>
<li>To develop research, presentation, and listening skills.</li>
<li>To foster an environment of intellectual debate and collaboration.</li>
</ul>
<li>Comparison with other methods:</li>
<ul style="color: rgb(255,255,255);">
<li>Unlike a lecture, it is not a one-way communication.</li>
<li>It is more organized and focused than a general group discussion.</li>
</ul>
<li>Relevance in Competitive Exams:</li>
<ul style="color: rgb(255,255,255);">
<li>Understanding various teaching methodologies is crucial for exams related to education, pedagogy, and teacher recruitment (e.g., TET, CTET, SET, NET).</li>
<li>Questions often test the ability to differentiate between teaching methods based on their structure and purpose.</li>
</ul>
</ul>

<h4 style="color: rgb(255,255,255);">Understanding the Terminology in Education</h4><ul style="color: rgb(255,255,255);"><li>Syllabus: This term specifically refers to a structured outline of the topics and content that are to be covered within a particular subject for a defined course of study. It acts as a roadmap for both educators and learners.</li><li>Curriculum: Often used interchangeably with syllabus, but broader in scope. A curriculum encompasses the overall educational plan, including learning objectives, teaching methodologies, assessment strategies, and the entire learning experience designed for a specific program or level of education.</li><li>Course of Study: This refers to a program of instruction or a period of study in a particular subject, typically leading to a qualification or degree. The syllabus is a component of the course of study.</li><li>Pedagogy: This is the art, science, or profession of teaching. It focuses on the methods and practices of instruction.</li><li>Didactics: Closely related to pedagogy, didactics is the theory and practice of education and instruction, focusing on the methods and principles of teaching.</li><li>Competitive Exam Relevance: Understanding the precise meaning of terms like syllabus and curriculum is crucial for competitive exams in education. Questions often test the ability to differentiate between these concepts. For instance, a question might ask about the document that outlines the specific topics to be taught in a mathematics class for grade 10, which would be the syllabus.</li><li>Key Distinction: The syllabus is a detailed list of topics, while the curriculum is the overarching framework that guides the entire educational process. Think of the syllabus as a chapter list in a book, and the curriculum as the entire book, including its themes, writing style, and intended audience.</li></ul>

both scholastic and the co-scholastic aspects of students

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