Biochemistry
1 questionsWhat is the amount of protein (in grams) in human milk per 100 milliliters?
NEET-PG 2012 - Biochemistry NEET-PG Practice Questions and MCQs
Question 741: What is the amount of protein (in grams) in human milk per 100 milliliters?
- A. 1.1 (Correct Answer)
- B. 2.2
- C. 3.3
- D. 4.4
Explanation: ***1.1*** - Human milk contains approximately **1.1 grams of protein per 100 milliliters**, which is appropriate for the growth and development of infants. - The protein composition of human milk is lower than that of cow's milk, but it is highly bioavailable and easily digestible due to the presence of **whey protein** and **casein**. *2.2* - This value is significantly higher than the typical protein content found in human milk. Such a high concentration could potentially strain an infant's immature kidneys. - The **protein content of cow's milk** (around 3.3-3.5 g/100ml) is much higher than human milk and is not suitable for routine infant feeding without modification. *3.3* - This protein concentration is also substantially higher than what is naturally found in human milk, possibly exceeding an infant's metabolic needs and kidney function. - This value is closer to the protein content of **unmodified cow's milk**, which is why it is often diluted or altered for infant formula. *4.4* - This protein amount is exceptionally high and not representative of natural human milk. - Excessive protein intake in infants could increase the risk of **obesity later in life** and place an undue burden on the **renal system**.
Community Medicine
6 questionsIn waste management, organic load is measured by which of the following?
In winter, water vapours and pollutants come to lie in the lowermost layer of atmosphere by -?
What percentage of waste generated in hospitals is considered infectious?
In the context of public health, which statistical measure is most commonly used to assess the variability of health-related data?
Which scheme aims to empower adolescent girls in India through holistic development and empowerment?
What is the caloric value of the nutritional supplement provided for a two-year-old child under the ICDS scheme?
NEET-PG 2012 - Community Medicine NEET-PG Practice Questions and MCQs
Question 741: In waste management, organic load is measured by which of the following?
- A. Biological oxygen demand (Correct Answer)
- B. Chemical oxygen demand
- C. Suspended solid
- D. Total dissolved solids
Explanation: ***Biological oxygen demand (BOD)*** - BOD is the **standard and primary measure of organic load** in waste management and wastewater treatment. - It measures the amount of **dissolved oxygen consumed by microorganisms** while decomposing biodegradable organic matter in water over a specific period (typically 5 days at 20°C - BOD₅). - Directly reflects the **biodegradable organic pollution** in wastewater and is the **gold standard** for assessing organic load in environmental health monitoring. - Used worldwide for **regulatory compliance** and treatment plant performance evaluation. *Chemical oxygen demand (COD)* - Measures the total quantity of oxygen required to **oxidize all organic AND inorganic compounds** in water chemically. - Gives **higher values than BOD** because it includes non-biodegradable substances and inorganic matter. - Useful as a **supplementary test** and provides faster results, but **does not specifically measure organic load alone**. - COD/BOD ratio helps assess biodegradability of wastewater. *Suspended solid* - Refers to particles suspended in water that **will not pass through a filter**. - Represents **physical impurities** rather than a direct measure of organic load. - Can carry organic material but is not a biochemical measure of organic pollution. *Total dissolved solids* - Measures all **inorganic and organic substances** dissolved in water. - Not a specific measure of organic load but rather overall water quality parameter.
Question 742: In winter, water vapours and pollutants come to lie in the lowermost layer of atmosphere by -?
- A. Acid rain
- B. Greenhouse effect
- C. Temperature inversion (Correct Answer)
- D. None of the options
Explanation: ***Temperature inversion*** - **Temperature inversion** is an atmospheric phenomenon where a layer of cool air at the surface is trapped beneath a layer of warmer air. - This stable condition prevents the normal vertical mixing of air, causing pollutants and water vapors to accumulate in the lowest layer of the atmosphere, leading to conditions like **smog** and **fog**. *Acid rain* - **Acid rain** refers to precipitation (rain, snow, fog, etc.) that contains elevated levels of nitric and sulfuric acids. - It results from the emissions of sulfur dioxide and nitrogen oxides into the atmosphere, which then react with water, oxygen, and other chemicals, rather than directly causing pollutants to lie in the lowermost layer. *Greenhouse effect* - The **greenhouse effect** is a natural process where certain gases in Earth's atmosphere trap heat, warming the planet. - While it affects global temperatures, it does not directly explain the specific phenomenon of pollutants and water vapors being trapped in the lowermost atmospheric layer during winter due to atmospheric stability. *None of the options* - Since **temperature inversion** accurately describes the mechanism responsible for trapping pollutants and water vapors in the lowermost atmospheric layer, this option is incorrect.
Question 743: What percentage of waste generated in hospitals is considered infectious?
- A. 80% of waste is infectious
- B. 100% of waste is infectious
- C. 65% of waste is infectious
- D. 15-20% of waste is infectious (Correct Answer)
Explanation: ***15-20% of waste is infectious*** - This is the **correct answer** as per WHO guidelines and standard biomedical waste management protocols. - Approximately **10-25% of hospital waste is classified as hazardous**, which includes infectious, pathological, sharps, chemical, pharmaceutical, and radioactive waste. - The remaining **75-90% is non-hazardous general waste** similar to domestic waste, including paper, packaging, food waste, and administrative materials. - Proper **waste segregation** is crucial to prevent mixing of infectious waste with general waste, which would unnecessarily increase handling and disposal costs. *65% of waste is infectious* - This is **incorrect** as it grossly overestimates the proportion of infectious waste. - Only a **minority of hospital waste is hazardous/infectious**, not the majority. - Such a high percentage would indicate poor waste segregation practices. *80% of waste is infectious* - This is **incorrect** and represents a severe overestimation. - The vast majority of hospital waste is actually **non-hazardous general waste**. - This misconception can lead to unnecessary treatment of general waste, increasing costs. *100% of waste is infectious* - This is **completely incorrect** and contradicts all biomedical waste management guidelines. - Hospitals generate significant amounts of **general administrative and domestic waste** that is not infectious. - Treating all waste as infectious would be economically unsustainable and environmentally unnecessary.
Question 744: In the context of public health, which statistical measure is most commonly used to assess the variability of health-related data?
- A. Mean
- B. Range
- C. Variance
- D. Standard deviation (Correct Answer)
Explanation: ***Standard deviation*** - The **standard deviation** is the most common measure of **variability** in public health, as it quantifies the average amount of dispersion or spread around the mean. - It is particularly useful because it is expressed in the same units as the original data, making it easy to interpret and compare differences in health outcomes. *Mean* - The **mean** is a measure of **central tendency**, representing the average value of a dataset. - While essential for understanding the typical value, it does not provide information about the **spread or variability** of the data. *Range* - The **range** is the difference between the **maximum and minimum values** in a dataset, offering a rudimentary measure of variability. - It is highly susceptible to **outliers** and does not give a comprehensive picture of data distribution, as it only considers two values. *Variance* - **Variance** measures the average of the **squared differences** from the mean, providing an indication of how far data points deviate from the average. - While closely related to standard deviation, its units are squared, making it less intuitive for direct interpretation of variability compared to the **standard deviation**.
Question 745: Which scheme aims to empower adolescent girls in India through holistic development and empowerment?
- A. Beti Bachao Beti Padhao Scheme
- B. Balika Samriddhi Yojana (Correct Answer)
- C. Kanya Sumangala Yojana
- D. Sukanya Samriddhi Yojana
Explanation: ***Balika Samriddhi Yojana*** - Launched in **1997** by the Government of India specifically to promote the **holistic development and empowerment** of girl children. - Provides **financial assistance** at birth and scholarships at various educational milestones (Class I, III, V, VI-VII, VIII, IX-X) to support their education and development. - Aims to change societal attitudes towards the girl child, reduce gender discrimination, and ensure their **overall development** through sustained financial support. - This scheme directly addresses **empowerment through holistic development** by covering both immediate needs and long-term educational goals. *Sukanya Samriddhi Yojana* - This is a **savings scheme** launched in **2015** as part of the Beti Bachao Beti Padhao campaign. - Focuses on **financial security** through savings for future education and marriage expenses, not holistic development programs. - Parents/guardians deposit money regularly; it does not provide direct financial assistance or scholarships for development milestones. *Beti Bachao Beti Padhao Scheme* - Launched in **2015** as a national campaign to address declining **Child Sex Ratio (CSR)** and promote girls' education. - Primarily an **awareness and advocacy program** focusing on prevention of female feticide and gender-biased sex selection. - While it promotes education and gender equality, it is not a direct empowerment scheme providing financial support for holistic development. *Kanya Sumangala Yojana* - This is a **state-level scheme** launched in **2019** by the Uttar Pradesh government. - Provides financial assistance in six installments from birth to graduation to promote girls' welfare. - While similar in concept to Balika Samriddhi Yojana, it was launched much later and is limited to one state.
Question 746: What is the caloric value of the nutritional supplement provided for a two-year-old child under the ICDS scheme?
- A. 500 Calories
- B. 300 Calories (Correct Answer)
- C. 200 Calories
- D. 400 Calories
Explanation: ***300 Calories*** - Under the **ICDS scheme guidelines in effect in 2012**, children aged 6 months to 6 years were provided a nutritional supplement of **300 kcal per day** along with 8-10g protein. - This supplement aimed to bridge the **nutritional gap** and prevent malnutrition in growing children. - **Note:** ICDS guidelines were subsequently revised (around 2017-2018), and current norms now specify **500 kcal** for the same age group. However, for this 2012 exam question, 300 kcal was the correct answer. *200 Calories* - This caloric value was **insufficient** even under the 2012 ICDS guidelines for meeting the daily supplemental nutritional requirements of a two-year-old child. - Providing only 200 calories would not adequately address the **energy demands** for growth and development in this age group. *400 Calories* - This specific caloric value was **not part of the standard ICDS supplementation schedule** in 2012. - The scheme specified clear categories: 300 kcal for normal children and 500 kcal for severely malnourished children, with no intermediate 400 kcal category. *500 Calories* - Under the **2012 ICDS guidelines**, this caloric value was reserved for **severely malnourished children** aged 6 months to 6 years (Grade III and IV malnutrition). - For a two-year-old with standard or moderate nutritional needs, the supplementation target was **300 kcal**, not 500 kcal. - **Current guidelines** (post-2017) now specify 500 kcal as the standard for all children 6 months to 6 years, but this was not the case in 2012.
Ophthalmology
1 questionsWhat type of refractive error is astigmatism, which is characterized by non-spherical curvature of the cornea or lens?
NEET-PG 2012 - Ophthalmology NEET-PG Practice Questions and MCQs
Question 741: What type of refractive error is astigmatism, which is characterized by non-spherical curvature of the cornea or lens?
- A. Spherical aberration
- B. Curvatural ametropia (Correct Answer)
- C. Index ametropia
- D. Axial ametropia
Explanation: ***Curvatural ametropia*** - Astigmatism, due to its **irregular corneal or lenticular curvature**, falls under the category of curvatural ametropia. - This type of ametropia occurs when the **optical power of the eye varies in different meridians**, leading to light focusing at multiple points rather than a single focal point. *Spherical aberration* - **Spherical aberration** is an optical error where light rays passing through the periphery of a lens focus at a different point than those passing through the center. - It results in a **loss of image clarity** but is distinct from astigmatism's power variation across meridians. *Axial ametropia* - **Axial ametropia** refers to refractive errors caused by an abnormal **length of the eyeball** (either too long or too short). - **Myopia** and **hyperopia** are primary examples of axial ametropia, where the eyeball length dictates whether light focuses in front of or behind the retina, respectively. *Index ametropia* - **Index ametropia** arises from variations in the **refractive index of the ocular media**, such as the cornea, lens, or vitreous humor. - Changes in the refractive index can alter how light bends, but astigmatism is primarily due to surface curvature, not changes in media refractive index.
Pharmacology
1 questionsWhich sulphonamide has the longest acting duration?
NEET-PG 2012 - Pharmacology NEET-PG Practice Questions and MCQs
Question 741: Which sulphonamide has the longest acting duration?
- A. Sulfadiazine
- B. Sulphadoxine (Correct Answer)
- C. Sulfamethoxazole
- D. Sulfamethiazole
Explanation: ***Sulphadoxine*** - **Sulphadoxine** is known for its **exceptionally long elimination half-life**, which is due to its high plasma protein binding and slow renal excretion. - This property allows for **once-weekly dosing**, making it one of the longest-acting sulfonamides, often used in combinations for malaria prophylaxis or treatment. *Sulfadiazine* - **Sulfadiazine** has an intermediate half-life, typically requiring **multiple daily doses**. - It is commonly used for infections like **toxoplasmosis** and **nocardiosis**. *Sulfamethoxazole* - **Sulfamethoxazole** has an intermediate half-life, usually requiring **twice-daily administration**. - It is most famously co-formulated with **trimethoprim** (as co-trimoxazole) for a broad range of bacterial infections. *Sulfamethiazole* - **Sulfamethiazole** is a **short-acting sulfanilamide derivative** with a rapid elimination, meaning it would require frequent dosing. - It is not commonly used systemically due to its short duration of action.
Physiology
1 questionsWhat is the characteristic of the second Purkinje image in relation to eye movement?
NEET-PG 2012 - Physiology NEET-PG Practice Questions and MCQs
Question 741: What is the characteristic of the second Purkinje image in relation to eye movement?
- A. Inverted and moves in same direction
- B. Inverted and moves in opposite direction
- C. Erect and moves in same direction (Correct Answer)
- D. Erect and moves in opposite direction
Explanation: ***Erect and moves in same direction*** - The second Purkinje image (P2) is formed by reflection from the **posterior surface of the cornea**. - This surface acts as a convex mirror, producing a **virtual, erect, and diminished image**. - The image moves in the **same direction** as the eye movement, characteristic of reflections from the first three Purkinje images (P1, P2, P3). - P2 is clinically used in keratometry and assessment of corneal curvature. *Erect and moves in opposite direction* - While the image orientation (erect) would apply to P2, the direction of movement is incorrect. - Only the **fourth Purkinje image (P4)**, formed by the **posterior lens surface**, moves in the opposite direction to eye movement. - P4 is the only inverted Purkinje image due to reflection from the concave posterior lens surface. *Inverted and moves in same direction* - The second Purkinje image is **erect, not inverted**. - All Purkinje images are erect except P4, which is inverted due to reflection from the concave posterior lens surface. - This combination (inverted + same direction) does not correspond to any Purkinje image. *Inverted and moves in opposite direction* - This describes the **fourth Purkinje image (P4)**, not the second. - P4 is formed by reflection from the **posterior surface of the lens** (concave surface), which produces an inverted image. - The second Purkinje image (P2) is always erect, being formed by the posterior corneal surface.