Biochemistry
1 questionsWhich amino acid in Jowar is responsible for its pellagragenic effect?
NEET-PG 2012 - Biochemistry NEET-PG Practice Questions and MCQs
Question 461: Which amino acid in Jowar is responsible for its pellagragenic effect?
- A. Leucine (Correct Answer)
- B. Lysine
- C. Tryptophan
- D. Methionine
Explanation: ***Leucine*** - A high intake of **leucine**, an essential amino acid, interferes with the metabolism of **tryptophan** and niacin, leading to **pellagra**. - Jowar (sorghum) contains high levels of leucine, which, when it forms a major part of the diet, can induce **niacin deficiency**. *Lysine* - Lysine is an essential amino acid and is generally considered to be in **limited supply** in many cereal grains, making it a desirable amino acid to increase in diets. - It does not directly contribute to the pellagragenic effect; rather, a deficiency in lysine can be a nutritional concern. *Tryptophan* - Tryptophan is a **precursor to niacin (Vitamin B3)** in the body; a deficiency in tryptophan can lead to pellagra. - The high leucine content in jowar interferes with the conversion of tryptophan to niacin, thus exacerbating niacin deficiency. *Methionine* - Methionine is an **essential sulfur-containing amino acid** important for various metabolic functions and protein synthesis. - It is not directly implicated in the pellagragenic effect associated with high jowar consumption.
Community Medicine
6 questionsIn pediatric growth assessment, what is the typical relationship observed between height and weight in healthy children?
National Leprosy Eradication Programme was started in -
Multi-purpose worker scheme in India was introduced following the recommendation of ?
What is the primary strategy of the Iodine Deficiency Control Programme?
In community medicine practice, what aspects are primarily studied to understand health outcomes?
In community medicine, what term describes an organized group of individuals in a population who share common cultural practices and social relationships that influence health behaviors?
NEET-PG 2012 - Community Medicine NEET-PG Practice Questions and MCQs
Question 461: In pediatric growth assessment, what is the typical relationship observed between height and weight in healthy children?
- A. Negative Correlation
- B. No Correlation
- C. Inverse Relationship
- D. Positive Correlation (Correct Answer)
Explanation: ***Positive Correlation*** - In healthy children, as **height increases**, **weight generally also increases** in a predictable pattern, demonstrating a **positive correlation** between these two variables. - This is a fundamental aspect of normal pediatric growth, where both height and weight increase together as children develop. - The **correlation coefficient** between height and weight in healthy children is typically **strong and positive** (r > 0.7). *Negative Correlation* - A **negative correlation** would imply that as height increases, weight decreases, which contradicts normal growth patterns in healthy children. - This relationship might be observed in certain pathological conditions (e.g., severe malnutrition with stunting) but is not characteristic of normal development. *No Correlation* - Stating **no correlation** would mean that changes in height have no predictable linear relationship with changes in weight, which contradicts well-established growth data. - Height and weight are both key anthropometric indicators that are inherently linked during normal growth. *Inverse Relationship* - An **inverse relationship** is synonymous with a negative correlation, suggesting that as one variable increases, the other decreases. - This is incorrect for normal pediatric growth, where height and weight generally trend upwards together throughout childhood.
Question 462: National Leprosy Eradication Programme was started in -
- A. 1949
- B. 1955
- C. 1973
- D. 1983 (Correct Answer)
Explanation: **Correct: 1983** - The **National Leprosy Eradication Programme (NLEP)** was launched in India in **1983** - Its goal was to eliminate leprosy as a public health problem by reducing its prevalence rate to less than 1 case per 10,000 population - This marked the shift from control to eradication strategy with the introduction of **Multi-Drug Therapy (MDT)** *Incorrect: 1949* - This year is not associated with the inception of a national leprosy eradication program in India - While efforts against leprosy existed, a comprehensive national program was not established at this time *Incorrect: 1955* - The **National Leprosy Control Programme (NLCP)** was launched in India in **1955** - This was a control program, preceding the eradication program, focusing on diagnosis and treatment with Dapsone monotherapy - NLCP was later upgraded to NLEP in 1983 *Incorrect: 1973* - This year is not cited as the start date for the national leprosy eradication program in India - The focus shifted from control to eradication in 1983 with the adoption of WHO-recommended MDT
Question 463: Multi-purpose worker scheme in India was introduced following the recommendation of ?
- A. Srivastava Committee
- B. Bhore Committee
- C. Kartar Singh Committee (Correct Answer)
- D. Chadha Committee
Explanation: ***Kartar Singh Committee*** - The **Kartar Singh Committee** (1973) recommended the implementation of the **multi-purpose worker scheme** in India. - This scheme aimed to integrate several health services at the grassroots level through a single health worker. *Srivastava Committee* - The **Srivastava Committee** (1975) focused on the creation of a **Medical and Health Education Commission** to reform medical education. - It did not specifically recommend the multi-purpose worker scheme. *Bhore Committee* - The **Bhore Committee** (1946), also known as the Health Survey and Development Committee, recommended a comprehensive health service with an emphasis on preventive and curative care. - It laid conceptual groundwork for primary healthcare but did not specifically propose the multi-purpose worker scheme, which came much later. *Chadha Committee* - The **Chadha Committee** (1963) reviewed India's health infrastructure and medical education. - It focused on health center development and medical college expansion, not the multi-purpose worker scheme.
Question 464: What is the primary strategy of the Iodine Deficiency Control Programme?
- A. Health education
- B. Water testing
- C. Fortification of salt (Correct Answer)
- D. Iodine supplementation
Explanation: ***Fortification of salt*** - **Iodization of salt** is the most cost-effective and widely implemented strategy globally to prevent and control iodine deficiency disorders (IDDs), ensuring a consistent intake of iodine in the population. - This public health intervention targets a staple food item, making it accessible to a broad population regardless of socioeconomic status. - **India's National Iodine Deficiency Disorders Control Programme (NIDDCP)** mandates universal salt iodization as the primary strategy. *Health education* - While important for promoting the consumption of iodized salt and understanding the benefits, it is a **supportive measure** rather than the primary strategy for ensuring widespread iodine intake. - Health education alone cannot guarantee the universal availability and consumption of iodine, especially in areas where iodized salt is not readily supplied. *Water testing* - **Testing water for iodine content** is not a primary strategy as water is generally not a significant source of dietary iodine, and iodine deficiency is primarily addressed through food fortification. - Water quality testing is typically for contaminants and minerals affecting health, not specifically for iodine deficiency control. *Iodine supplementation* - While supplementation (iodized oil capsules) is used in **specific high-risk groups** or areas with severe deficiency, it is not sustainable as a universal primary strategy. - Supplementation requires active distribution and monitoring, making it less cost-effective than salt fortification for population-wide coverage.
Question 465: In community medicine practice, what aspects are primarily studied to understand health outcomes?
- A. Individual health behaviors
- B. Both individual health behaviors and community social factors (Correct Answer)
- C. Community health relationships
- D. None of the above
Explanation: **_Both individual health behaviors and community social factors_** - Community medicine emphasizes a **holistic view of health**, recognizing that outcomes are shaped by both personal choices and the broader social and economic environment. - Studying these interconnected aspects allows for the development of comprehensive public health interventions that address multiple determinants of health. *Individual health behaviors* - While important, focusing solely on individual behaviors overlooks the significant impact of **environmental and social determinants** on health outcomes. - Health behaviors are often influenced by **social factors**, making it insufficient to study them in isolation within community medicine. *Community health relationships* - This term is somewhat vague; while relationships within a community are part of social factors, it does not encompass all the **broader social, economic, and environmental determinants** studied in community medicine. - This option is too narrow to fully capture the scope of what is studied to understand health outcomes in a community setting. *None of the above* - This option is incorrect because understanding health outcomes in community medicine requires considering various factors, including both individual and community-level influences. - The integration of **individual behaviors and community social factors** is central to this field.
Question 466: In community medicine, what term describes an organized group of individuals in a population who share common cultural practices and social relationships that influence health behaviors?
- A. Community (Correct Answer)
- B. Society
- C. Association
- D. None of the options
Explanation: ***Community*** - **Community** is the correct term in community medicine for an organized group of individuals who share common cultural practices and social relationships that influence health behaviors. - In public health, a **community** is defined as a group of people with common characteristics (geographic location, culture, values, or interests) who interact within a social structure and create norms, values, and social institutions. - The concept of community is fundamental to community medicine, as it represents the basic unit for health intervention, disease prevention, and health promotion activities. - Communities share **collective identity**, **social ties**, and **common interests** that directly influence health behaviors and outcomes. *Society* - **Society** is a much broader term referring to an entire social organization encompassing multiple communities, often at the national or civilizational level. - While society includes cultural practices and social relationships, it is **too broad** for the specific context described in the question. - In community medicine practice, interventions are typically **community-based**, not society-based, as communities represent more manageable and identifiable units for health programs. *Association* - An **association** typically refers to a formal organization created for a specific purpose or shared interest (e.g., medical association, trade association). - It implies **voluntary membership** and formal structure, rather than the organic social relationships and cultural practices that characterize a community. - Associations are **subsets within communities**, not equivalent to the comprehensive social grouping described in the question. *None of the options* - This option is incorrect because **"Community"** accurately and precisely describes the concept presented in the question. - The definition provided aligns perfectly with how "community" is defined and used in community medicine and public health literature.
Microbiology
1 questionsWhich of the following statements is true regarding T cell independent antigens?
NEET-PG 2012 - Microbiology NEET-PG Practice Questions and MCQs
Question 461: Which of the following statements is true regarding T cell independent antigens?
- A. They primarily activate T-cells.
- B. They primarily activate B-cells. (Correct Answer)
- C. They primarily activate macrophages.
- D. They primarily activate CD8+ T cells.
Explanation: ***Correct: They primarily activate B-cells*** - T-cell independent antigens are typically **polysaccharides** (TI-2) or **lipopolysaccharides** (TI-1) with repeating epitopes that can directly cross-link B cell receptors (BCRs) - This direct binding and cross-linking provide a strong enough signal to activate B cells and induce **antibody production** (mainly IgM) without the need for T cell help - They induce a rapid but limited immune response with minimal memory formation *Incorrect: They primarily activate T-cells* - T-cell independent antigens do not require processing and presentation by **MHC molecules**, which is essential for T cell activation - T cells recognize processed peptides presented by MHC, a mechanism not utilized by T-cell independent antigens - By definition, these antigens activate B cells **without** T cell involvement *Incorrect: They primarily activate macrophages* - While macrophages are antigen-presenting cells, their primary role in adaptive immunity is to process and present antigens to T cells - Macrophages are involved in **phagocytosis** and antigen processing, but are not the primary target cells for T-independent antigens - The key feature of TI antigens is direct B cell activation, not macrophage activation *Incorrect: They primarily activate CD8+ T cells* - **CD8+ T cells** are activated by processed antigens presented on **MHC class I molecules**, typically derived from intracellular pathogens - T-cell independent antigens do not utilize this pathway and are primarily involved in **humoral immunity** through direct B cell activation - TI antigens cannot activate CD8+ T cells as they bypass the T cell-dependent pathway entirely
Ophthalmology
1 questionsThe reduced effect of low astigmatism in dim light is primarily due to:
NEET-PG 2012 - Ophthalmology NEET-PG Practice Questions and MCQs
Question 461: The reduced effect of low astigmatism in dim light is primarily due to:
- A. Pupil dilatation
- B. Pupil constriction (Correct Answer)
- C. Increased curvature of lens
- D. Decreased curvature of lens
Explanation: ***Pupil constriction*** - In dim light conditions, patients with low astigmatism may experience **reduced symptoms** due to the **pinhole effect** of pupil constriction when they squint or strain to see better. - **Pupil constriction** limits light entry to the central optical zone, reducing the effect of irregular corneal curvature by creating a smaller aperture that acts like a **stenopic slit**. - This **pinhole effect** improves depth of focus and reduces blur from astigmatism by eliminating peripheral aberrant rays. - When viewing in dim light, patients naturally squint to improve clarity, which mimics pupil constriction and reduces astigmatic blur. *Pupil dilatation* - **Pupil dilatation** in dim light would actually *increase* astigmatic symptoms, not reduce them. - A larger pupil allows more peripheral rays to enter the eye, which pass through areas of the lens and cornea with greater refractive error. - This increases the blur circle and worsens the optical quality in uncorrected astigmatism. *Increased curvature of lens* - **Increased lens curvature** (accommodation) increases refractive power but does not correct the unequal curvature of different meridians that defines astigmatism. - This would not specifically reduce astigmatic blur in dim light conditions. *Decreased curvature of lens* - **Decreased lens curvature** reduces refractive power and is associated with relaxed accommodation. - This does not address the fundamental issue of unequal meridional refraction in astigmatism.
Pharmacology
1 questionsWhich of the following best describes a Type B adverse drug reaction?
NEET-PG 2012 - Pharmacology NEET-PG Practice Questions and MCQs
Question 461: Which of the following best describes a Type B adverse drug reaction?
- A. Augmented effect of drug
- B. Effect seen on chronic use of drug
- C. Delayed effect of drug
- D. Unpredictable bizarre reaction (Correct Answer)
Explanation: ***Unpredictable bizarre reaction*** - Type B reactions are **unpredictable**, **bizarre**, and not directly related to the drug's known pharmacological actions. - They often involve **immunological reactions** or genetic predispositions, such as allergies or idiosyncratic responses. *Augmented effect of drug* - This describes a **Type A** adverse drug reaction, which is predictable and results from an **exaggerated pharmacological effect** of the drug. - It is typically dose-dependent and can be managed by adjusting the dosage. *Effect seen on chronic use of drug* - This description can apply to several types of adverse reactions, but it commonly relates to **Type C (chronic) reactions**, where effects occur only after prolonged exposure. - These reactions might be due to **cumulative toxicity** or adaptive changes in the body. *Delayed effect of drug* - This aligns with **Type D (delayed) adverse drug reactions**, which manifest long after the drug exposure has ended or after a period of latency. - Examples include **carcinogenesis** or teratogenesis, occurring months or years later.