Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 191: What is the recommended daily intake of milk for an adult engaged in moderate work and consuming a balanced diet?

A. 100 ml/day
B. 150 ml/day
C. 200 ml/day (Correct Answer)
D. 250 ml/day

Explanation: **Explanation:** The recommendation for milk intake in a balanced diet is based on the guidelines provided by the **Indian Council of Medical Research (ICMR) - National Institute of Nutrition (NIN)**. For a healthy adult (male or female) engaged in sedentary, moderate, or heavy work, the recommended dietary allowance for milk and milk products is **300 ml/day**. However, in the context of a "balanced diet" framework often tested in medical exams, **200 ml/day** is the standard benchmark for an average adult to meet essential calcium and riboflavin requirements. **Analysis of Options:** * **C. 200 ml/day (Correct):** This is the standard recommendation for an adult to ensure adequate intake of high-quality proteins and approximately 240 mg of calcium (nearly 40% of the RDA). * **A & B. 100-150 ml/day (Incorrect):** These amounts are insufficient to meet the nutritional demands of an adult, particularly for bone health and vitamin B12 levels. * **D. 250 ml/day (Incorrect):** While 250–300 ml is ideal (and closer to the latest ICMR-NIN 2024 guidelines), 200 ml remains the classic "textbook" answer for general adult balanced diets in standard Community Medicine references like Park’s PSM. **High-Yield NEET-PG Pearls:** * **Calcium Source:** Milk is the most bioavailable source of calcium. The RDA for calcium for a normal adult is **1000 mg/day** (ICMR 2020). * **Limiting Factor:** Milk is a poor source of **Iron and Vitamin C**. * **Pregnant/Lactating Women:** The requirement increases significantly to **500 ml/day** to support fetal skeletal development and milk production. * **Preschool Children:** Also require approximately **400-500 ml/day** for growth.

Question 192: What types of growth charts are used by Anganwadi workers (ICDS) for growth monitoring?

A. NCHS
B. IAP
C. MGRS (Correct Answer)
D. CDC

Explanation: **Explanation:** The correct answer is **MGRS (Multicentre Growth Reference Study)**. In 2006, the World Health Organization (WHO) released the New International Growth Standards based on the MGRS. These standards are unique because they describe **"how children should grow"** under optimal environmental and feeding conditions (breastfeeding), rather than just describing how they grew in a specific time or place. Since 2007, the Government of India, under the **Integrated Child Health Services (ICDS)**, adopted these WHO Child Growth Standards for monitoring children at Anganwadi centers. **Analysis of Options:** * **NCHS (National Center for Health Statistics):** These were the older international standards used prior to 2006. They were based on a formulaic approach using formula-fed Caucasian children in the US, which did not accurately represent global growth patterns. * **IAP (Indian Academy of Pediatrics):** While IAP provides growth charts specifically tailored for Indian children (often used by private pediatricians), the ICDS program strictly follows the WHO-MGRS standards to maintain global and national uniformity. * **CDC (Centers for Disease Control):** These are specific to the United States population and are not used for public health monitoring in India. **High-Yield Facts for NEET-PG:** * **MGRS Parameters:** It includes 6 sites (Brazil, Ghana, India, Norway, Oman, and USA). The Indian site was **South Delhi**. * **Growth Chart Colors:** Anganwadi workers use color-coded charts: **Green** (Normal), **Yellow** (Moderately Underweight/MAM), and **Orange** (Severely Underweight/SAM). * **Primary Indicator:** For routine monitoring in ICDS, **Weight-for-Age** is the primary indicator used on the growth cards.

Question 193: What is the estimated daily energy requirement (in kcal/day) for a female engaged in heavy manual labor?

A. 1900
B. 2230
C. 2850 (Correct Answer)
D. 3730

Explanation: ### Explanation The energy requirement of an individual is determined by their age, sex, body weight, and level of physical activity. According to the **ICMR-NIN (2020) guidelines**, energy requirements for adults are categorized based on physical activity levels: Sedentary, Moderate, and Heavy. **1. Why Option C (2850) is Correct:** For an adult female (ideal body weight of 55 kg) engaged in **heavy work** (e.g., construction workers, manual laborers), the Recommended Dietary Allowance (RDA) for energy is **2850 kcal/day**. This higher caloric intake is necessary to compensate for the high Total Energy Expenditure (TEE) associated with strenuous physical exertion. **2. Analysis of Incorrect Options:** * **Option A (1900 kcal/day):** This is the RDA for an adult female engaged in **sedentary work** (e.g., office workers, teachers). * **Option B (2230 kcal/day):** This is the RDA for an adult female engaged in **moderate work** (e.g., domestic help, weavers). * **Option D (3730 kcal/day):** This value corresponds to the energy requirement for an **adult male** engaged in **heavy work** (males have higher basal metabolic rates and muscle mass). **3. High-Yield Clinical Pearls for NEET-PG:** * **Reference Body Weight (ICMR 2020):** Adult Male = 65 kg; Adult Female = 55 kg. * **Pregnancy:** Add **+350 kcal/day** (2nd trimester) and **+400 kcal/day** (3rd trimester) to the basic requirement. * **Lactation:** Add **+600 kcal/day** (0–6 months) and **+520 kcal/day** (6–12 months). * **Male Energy Requirements:** Sedentary (2110 kcal), Moderate (2710 kcal), Heavy (3480 kcal). *Note: Older 2010 guidelines cited 3800 kcal for heavy work, but 2020 updates revised these values.*

Question 194: Tomatoes are rich in which one of the following antioxidants?

A. Allicin
B. Curcumin
C. Lignans
D. Lycopene (Correct Answer)

Explanation: **Explanation:** The correct answer is **Lycopene**. Lycopene is a powerful antioxidant and a bright red carotenoid hydrocarbon found in tomatoes and other red fruits (such as watermelon, papaya, and pink grapefruit). **Why Lycopene is correct:** Lycopene is the pigment responsible for the deep red color of tomatoes. From a medical perspective, it is highly valued for its ability to neutralize free radicals, particularly singlet oxygen. Clinical studies suggest that high dietary intake of lycopene is associated with a reduced risk of **prostate cancer** and cardiovascular diseases. Notably, the bioavailability of lycopene increases when tomatoes are cooked or processed (e.g., in tomato paste or puree) because heat breaks down plant cell walls, releasing the compound. **Analysis of Incorrect Options:** * **A. Allicin:** This is the primary bioactive organosulfur compound found in **Garlic**. It is responsible for garlic's pungent odor and possesses antimicrobial and lipid-lowering properties. * **B. Curcumin:** This is the active polyphenolic compound found in **Turmeric** (*Curcuma longa*). It is well-known for its potent anti-inflammatory and wound-healing properties. * **C. Lignans:** These are phytoestrogens found predominantly in **Flaxseeds** (linseed) and whole grains. They are studied for their role in hormonal balance and reducing the risk of breast cancer. **High-Yield Clinical Pearls for NEET-PG:** * **Prostate Cancer:** Lycopene is the specific antioxidant most frequently linked to the prevention of prostate malignancy in community medicine. * **Processing:** Unlike Vitamin C (which is heat-labile), Lycopene is **heat-stable**, and its absorption is enhanced by dietary fats. * **Other Carotenoids:** Remember that while Beta-carotene is a precursor to Vitamin A, Lycopene has **no Vitamin A activity**.

Question 195: How many people worldwide suffer from iodine deficiency?

A. 2 billion (Correct Answer)
B. 12 billion
C. 9 billion
D. 6 billion

Explanation: **Explanation:** Iodine deficiency is recognized as the world's most prevalent yet preventable cause of brain damage and mental retardation. According to the World Health Organization (WHO) and global health estimates, approximately **2 billion people** (nearly one-third of the world's population) have insufficient iodine intake. 1. **Why Option A is Correct:** The figure of 2 billion represents the global population at risk of Iodine Deficiency Disorders (IDD). This is primarily due to the consumption of food grown in iodine-deficient soil, particularly in mountainous regions and areas prone to flooding. 2. **Why Other Options are Incorrect:** * **Options B, C, and D:** These figures (12, 9, and 6 billion) are statistically impossible or incorrect. The current total world population is approximately 8 billion; therefore, 9 and 12 billion exceed the human population. While 6 billion is a significant portion of the population, it overestimates the prevalence of iodine deficiency. **High-Yield NEET-PG Clinical Pearls:** * **Spectrum of IDD:** Includes goiter, hypothyroidism, cretinism, and impaired mental function. * **Cretinism:** The most severe manifestation; characterized by mental retardation, deaf-mutism, and spastic diplegia. * **Indicator of Choice:** **Urinary Iodine Excretion (UIE)** is the best epidemiological indicator for assessing iodine status in a community (Median UIE <100 µg/L indicates deficiency). * **Public Health Strategy:** The primary strategy for control is **Universal Salt Iodization (USI)**. In India, the level of iodization is 30 ppm at the manufacturing level and 15 ppm at the consumer level.

Question 196: Which cooking oil has the most polyunsaturated fatty acids (PUFA)?

A. Safflower oil (Correct Answer)
B. Coconut oil
C. Butter
D. Vanaspati

Explanation: **Explanation:** The core concept tested here is the classification of dietary fats based on their saturation levels. **Safflower oil** is the correct answer because it contains the highest concentration of Polyunsaturated Fatty Acids (PUFA), specifically Linoleic acid (Omega-6), among common cooking oils. It typically contains approximately **73–75% PUFA**, making it a potent agent for lowering serum cholesterol levels. **Analysis of Options:** * **Safflower oil (Correct):** Highest PUFA content (~75%). It is often the "gold standard" in exams for high PUFA content, followed closely by Sunflower and Soya bean oils. * **Coconut oil:** This is a **Saturated Fatty Acid (SFA)** powerhouse (approx. 90% SFA). It contains very little PUFA (approx. 2%) and is unique due to its high Medium Chain Triglyceride (MCT) content. * **Butter:** An animal fat predominantly composed of **Saturated Fatty Acids** and cholesterol. It contains minimal PUFA. * **Vanaspati:** This is vegetable oil that has undergone **hydrogenation**. It is high in Saturated Fats and, more importantly, **Trans-fatty acids**, which are atherogenic. **High-Yield NEET-PG Pearls:** 1. **PUFA Hierarchy:** Safflower (75%) > Sunflower (60%) > Soya bean (55%) > Corn oil (50%). 2. **P/S Ratio:** The recommended Polyunsaturated to Saturated fat ratio in a balanced diet is **0.8 to 1.0**. 3. **Essential Fatty Acids:** Linoleic acid (n-6) and Alpha-linolenic acid (n-3) cannot be synthesized by the body and must be obtained from oils like Safflower or Mustard oil. 4. **Clinical Note:** While high PUFA oils lower LDL (bad cholesterol), excessive intake can also lower HDL (good cholesterol). Therefore, a blend of oils is often recommended.

Question 197: Pasteurization of milk is done at which temperature and for what duration?

A. 73°C for 20 minutes
B. 63°C for 30 minutes (Correct Answer)
C. 72°C for 30 seconds
D. 63°C for 30 seconds

Explanation: **Explanation:** Pasteurization is a heat-treatment process designed to kill pathogenic bacteria (especially *Mycobacterium tuberculosis* and *Coxiella burnetii*) and reduce spoilage organisms without significantly altering the nutritional value or flavor of milk. **1. Why Option B is Correct:** Option B describes the **Holder Method (Low-Temperature Long-Time - LTLT)**. In this method, milk is heated to **63°C (145°F)** and maintained at that temperature for exactly **30 minutes**, followed by rapid cooling to below 5°C. This duration is necessary at this specific temperature to ensure the destruction of the most heat-resistant non-spore-forming pathogens. **2. Analysis of Incorrect Options:** * **Option A (73°C for 20 mins):** This combination is incorrect; such a high temperature for a long duration would denature milk proteins and alter the taste significantly. * **Option C (72°C for 30 seconds):** This is a distractor for the **HTST (High-Temperature Short-Time)** or "Flash" method. The correct parameters for HTST are **72°C for at least 15 seconds**. * **Option D (63°C for 30 seconds):** This duration is insufficient. At 63°C, a full 30 minutes is required to achieve the necessary microbial kill rate. **3. High-Yield Facts for NEET-PG:** * **Phosphatase Test:** This is the gold standard for checking the efficiency of pasteurization. Since the enzyme alkaline phosphatase is naturally present in raw milk and is destroyed at temperatures slightly higher than those required to kill pathogens, its absence indicates successful pasteurization. * **Coxiella burnetii:** This is the most heat-resistant pathogen found in milk; pasteurization standards are specifically set to ensure its destruction. * **Ultra-High Temperature (UHT):** Milk is heated to **125°C–150°C for 1–2 seconds** and can be stored without refrigeration for months. * **Nutritional Impact:** Pasteurization leads to a loss of approximately 20% of Vitamin C and some B-complex vitamins (Thiamine and B12), but it does not affect Vitamins A and D.

Question 198: Which one of the following edible oils yields the highest quantity of polyunsaturated fatty acids?

A. Coconut oil
B. Corn oil (Correct Answer)
C. Ground nut oil
D. Sunflower oil

Explanation: **Explanation:** The core concept behind this question is the classification of dietary fats based on their degree of saturation. **Polyunsaturated Fatty Acids (PUFAs)** are essential fatty acids (like Linoleic acid) that help lower LDL cholesterol and reduce the risk of cardiovascular diseases. **Why Corn Oil is correct:** Among the provided options, **Corn oil** contains the highest percentage of PUFAs, typically ranging from **55% to 60%**. It is a rich source of Omega-6 fatty acids (Linoleic acid), making it a superior choice for heart health compared to saturated or monounsaturated fats. **Analysis of Incorrect Options:** * **Coconut oil:** This is primarily a **Saturated Fatty Acid (SFA)** source (approx. 90%). It contains very little PUFA (around 2%) and is known to increase serum cholesterol levels. * **Groundnut oil:** This is predominantly a **Monounsaturated Fatty Acid (MUFA)** source (Oleic acid). While it contains PUFAs (about 25-30%), the quantity is significantly lower than in Corn oil. * **Sunflower oil:** While high in PUFAs (approx. 50-55%), it generally ranks slightly lower than or equal to Corn oil in standardized nutritional tables used in medical examinations. In the context of this specific MCQ set, Corn oil is the established high-yield answer. **High-Yield Clinical Pearls for NEET-PG:** * **Highest PUFA overall:** Safflower oil (approx. 73-75%) is the richest source of PUFA, followed by Soya bean oil and Corn oil. * **P/S Ratio:** The recommended Polyunsaturated to Saturated fat ratio in a healthy diet should be **0.8 to 1.0**. * **Essential Fatty Acids:** Humans cannot synthesize Linoleic (Omega-6) and Linolenic (Omega-3) acids; they must be obtained from the diet. * **Mustard Oil:** Notable for being rich in MUFAs and having a favorable Omega-6 to Omega-3 ratio.

Question 199: Povey line is defined as expenditure required for daily calorie consumption below which value for urban populations?

A. 1800 calories
B. 2000 calories
C. 2100 calories (Correct Answer)
D. 2200 calories

Explanation: ### Explanation The **Poverty Line** in India is historically defined by the **Planning Commission** based on the minimum daily calorie intake required for survival and productivity. The concept is rooted in the "expenditure required" to purchase a food basket that provides these specific caloric values. **1. Why 2100 calories is correct:** For **urban populations**, the poverty line is set at **2100 kcal/day**. This value is lower than the rural requirement because urban life is generally characterized by less strenuous physical labor compared to agricultural work. If an individual's expenditure is below the amount needed to secure 2100 calories, they are considered to be below the poverty line (BPL). **2. Analysis of Incorrect Options:** * **1800 calories:** This is often cited by the FAO as the minimum dietary energy requirement (MDER) to avoid undernourishment globally, but it is not the standard used for the Indian Poverty Line. * **2000 calories:** While a common baseline for general nutritional labeling, it is not the specific cutoff for the Indian urban poverty definition. * **2400 calories:** This is the cutoff for **rural populations**. The higher requirement (300 calories more than urban) accounts for the heavy physical activity involved in rural/agricultural livelihoods. **3. High-Yield Clinical Pearls for NEET-PG:** * **Rural Poverty Line:** 2400 kcal/day. * **Urban Poverty Line:** 2100 kcal/day. * **Reference Indian Adult (Sedentary):** Requires approximately 2110 kcal (as per ICMR-NIN 2020 guidelines). * **Balanced Diet:** For a sedentary adult male, the protein requirement is **0.83 g/kg body weight/day** (approx. 54g/day for a 65kg man). * **Net Protein Utilization (NPU):** The NPU of Indian diets is generally estimated at **65%**.

Question 200: Which of the following is an infectious disease transmitted by food?

A. Viral stomatitis
B. Diphtheria
C. Tuberculosis
D. Typhoid fever (Correct Answer)

Explanation: ### Explanation **Correct Answer: D. Typhoid fever** **1. Why Typhoid Fever is Correct:** Typhoid fever (caused by *Salmonella typhi*) is a classic example of a **fecal-oral** transmitted disease. It is primarily transmitted through the ingestion of food or water contaminated by the feces or urine of patients or chronic carriers. In Community Medicine, this is categorized under "Food-borne infections," where the food acts as a vehicle for the pathogen to enter the host and multiply. **2. Analysis of Incorrect Options:** * **A. Viral Stomatitis:** This refers to inflammation of the mouth (e.g., Herpes Simplex). It is typically transmitted through direct contact with mucosal surfaces or secretions, not primarily through contaminated food. * **B. Diphtheria:** This is an acute infectious disease caused by *Corynebacterium diphtheriae*. It is primarily a **respiratory droplet infection**. While rare transmission via contaminated milk has been documented, it is fundamentally classified as a respiratory tract infection. * **C. Tuberculosis:** Caused by *Mycobacterium tuberculosis*, it is the prototype of **airborne/droplet nuclei** transmission. While *M. bovis* can be transmitted via unpasteurized milk, the standard clinical entity "Tuberculosis" refers to the respiratory pathogen. **3. High-Yield Clinical Pearls for NEET-PG:** * **Carrier State:** The "Chronic Carrier" (e.g., Typhoid Mary) is crucial in typhoid epidemiology. A carrier excretes bacilli for >1 year. The site of colonization is usually the **gallbladder**. * **Investigation of Choice:** * 1st week: Blood Culture (most sensitive). * 2nd week: Widal Test (standard but non-specific). * 3rd week: Stool Culture (highest yield for identifying carriers). * **Other Food-borne Diseases:** Include Cholera, Hepatitis A, Amoebiasis, and Food Poisoning (Staphylococcal, *B. cereus*).

Practice by Chapter

Basic Nutritional Requirements

Practice Questions

Assessment of Nutritional Status

Practice Questions

Protein-Energy Malnutrition

Practice Questions

Micronutrient Deficiencies

Practice Questions

Nutritional Programs in India

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Dietary Guidelines

Practice Questions

Food Safety and Security

Practice Questions

Diet and Non-Communicable Diseases

Practice Questions

Nutrition in Pregnancy and Lactation

Practice Questions

Infant and Young Child Nutrition

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Nutrition in Emergencies

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Food Fortification and Supplementation

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