Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 221: Absorption of vitamin A can be enhanced by giving the child a diet rich in which of the following?

A. Fat (Correct Answer)
B. Protein
C. Minerals
D. Carbohydrates

Explanation: **Explanation:** **Why Fat is the Correct Answer:** Vitamin A is a **fat-soluble vitamin** (along with Vitamins D, E, and K). Its absorption in the small intestine is dependent on the presence of dietary lipids. Dietary fats trigger the release of bile salts and facilitate the formation of **micelles**, which are essential for transporting fat-soluble vitamins across the intestinal mucosa into the lymphatic system. In children with very low-fat diets, even if they consume adequate provitamin A (carotenoids), the absorption efficiency drops significantly, leading to deficiency. **Why Other Options are Incorrect:** * **Protein:** While protein is necessary for the synthesis of **Retinol Binding Protein (RBP)** for transport in the blood, it does not directly facilitate the initial absorption process in the gut. * **Minerals:** Minerals like Zinc are co-factors for enzymes involved in Vitamin A metabolism, but they do not enhance its absorption. * **Carbohydrates:** These are water-soluble macronutrients and have no physiological role in the micellar solubilization required for Vitamin A uptake. **NEET-PG High-Yield Pearls:** * **Storage:** Vitamin A is primarily stored in the **Ito cells** (Stellate cells) of the liver. * **Bioavailability:** Retinol (animal sources like egg, liver) has higher bioavailability than Beta-carotene (plant sources like green leafy vegetables). * **Prophylaxis:** Under the National Vitamin A Prophylaxis Program, the first dose (1 lakh IU) is given at 9 months (with Measles/MR vaccine), followed by 2 lakh IU every 6 months until age 5 (Total 9 doses/17 lakh IU). * **Clinical Sign:** **Bitot’s spots** are the most characteristic ocular feature of Vitamin A deficiency in children.

Question 222: What is the daily iron requirement for a pregnant woman?

A. 1.6 mg/day
B. 2.8 mg/day (Correct Answer)
C. 4 mg/day
D. 65 mg/day

Explanation: **Explanation:** The daily iron requirement for a pregnant woman is **2.8 mg/day**. This value refers to the **physiological requirement** (absorbed iron) needed to support the expansion of maternal red cell mass, the growth of the fetus, and the development of the placenta. **Why 2.8 mg/day is correct:** According to the ICMR-NIN (2020) guidelines, the physiological iron requirement increases significantly during pregnancy to meet the demands of the developing fetus and to compensate for blood loss during delivery. While a non-pregnant woman requires approximately 1.1–1.3 mg/day, this requirement jumps to 2.8 mg/day during pregnancy. **Analysis of Incorrect Options:** * **A. 1.6 mg/day:** This is closer to the physiological requirement for an adolescent girl or a lactating mother, but insufficient for the high demands of pregnancy. * **C. 4 mg/day:** This exceeds the standard physiological requirement for pregnancy. * **D. 65 mg/day:** This represents the **Recommended Dietary Allowance (RDA)** or oral intake, not the physiological requirement. Because dietary iron absorption is low (approx. 5–10%), a woman must ingest ~60–65 mg to ensure ~2.8 mg is actually absorbed. **High-Yield Clinical Pearls for NEET-PG:** * **IFA Supplementation (Anemia Mukt Bharat):** Pregnant women should receive **100 mg elemental iron** and **500 µg folic acid** daily for 180 days, starting from the second trimester. * **Total Iron Requirement:** A full-term pregnancy requires a total of approximately **1000 mg** of iron (300 mg for the fetus/placenta, 500 mg for maternal RBC expansion, and 200 mg for blood loss). * **Absorption:** Iron is best absorbed on an empty stomach with Vitamin C (Citrus fruits) and inhibited by phytates, tannins (tea/coffee), and calcium.

Question 223: What is the recommended interval for vitamin A prophylaxis in children?

A. 3 months
B. 6 months (Correct Answer)
C. 12 months
D. 18 months

Explanation: The **Vitamin A Prophylaxis Programme** in India (under the Reproductive and Child Health program) is designed to prevent nutritional blindness by maintaining adequate hepatic stores of Vitamin A. ### **Explanation of the Correct Answer** **Option B (6 months)** is correct because the biological half-life of Vitamin A stored in the liver is approximately 6 months. To ensure a continuous supply for physiological needs and to prevent xerophthalmia, periodic "mega-doses" are administered every 6 months to children aged 9 months to 5 years. ### **Analysis of Incorrect Options** * **Option A (3 months):** This interval is too frequent. High doses of Vitamin A are fat-soluble and stored in the liver; administering them every 3 months increases the risk of hypervitaminosis A (toxicity). * **Option C & D (12/18 months):** These intervals are too long. By 12 months, the liver stores from the previous dose would be depleted, leaving the child vulnerable to Vitamin A Deficiency (VAD) and increased morbidity from infections like measles and diarrhea. ### **High-Yield Clinical Pearls for NEET-PG** * **Schedule & Dosage:** * **1st Dose:** At 9 months (with Measles/MR vaccine) – **1 lakh IU** (1 ml). * **2nd to 9th Dose:** Every 6 months until age 5 – **2 lakh IU** (2 ml) each. * **Total Doses:** A child receives a total of **9 doses**. * **Total Cumulative Dose:** **17 lakh IU** (1 + [8 × 2]). * **Target Age Group:** 9 months to 60 months (5 years). * **Public Health Impact:** Vitamin A supplementation reduces all-cause mortality in children by approximately 23-24%.

Question 224: Which of the following is NOT a diagnostic criterion for severe acute malnutrition (SAM)?

A. Mid-upper arm circumference (MUAC) < 115 mm
B. Weight for age < -3 Z score (Correct Answer)
C. Presence of bipedal edema
D. Presence of visible severe wasting

Explanation: ### Explanation The diagnostic criteria for **Severe Acute Malnutrition (SAM)** in children aged 6–59 months are based on the WHO/UNICEF guidelines. SAM is defined by the presence of at least one of the following: 1. **Mid-Upper Arm Circumference (MUAC) < 115 mm (11.5 cm).** 2. **Weight-for-Height/Length < -3 Z-score** (Standard Deviations) of the WHO growth standards. 3. **Bilateral Pitting Edema** of nutritional origin (indicative of Kwashiorkor). 4. **Visible Severe Wasting** (added in clinical settings where anthropometry is unavailable). **Why Option B is the Correct Answer:** **Weight-for-Age < -3 Z-score** is the criterion for **Underweight**, not SAM. Weight-for-age is a composite indicator that does not distinguish between acute malnutrition (wasting) and chronic malnutrition (stunting). Therefore, it is not used to diagnose SAM. **Analysis of Incorrect Options:** * **Option A (MUAC < 115 mm):** This is a primary screening tool for SAM. It reflects muscle mass depletion and is a strong predictor of mortality. * **Option C (Bipedal Edema):** The presence of bilateral pitting edema automatically classifies a child as having SAM, regardless of other anthropometric measurements. * **Option D (Visible Severe Wasting):** This includes signs like "baggy pants" appearance (due to loss of gluteal fat) and prominent ribs, used as a clinical diagnostic marker for Marasmus. **High-Yield Clinical Pearls for NEET-PG:** * **SAM vs. MAM:** Moderate Acute Malnutrition (MAM) is defined as MUAC between 115–125 mm or Weight-for-Height between -2 and -3 Z-scores. * **Stunting:** Defined as **Height-for-Age < -2 Z-score**, reflecting chronic malnutrition. * **Appetite Test:** The most important initial step in managing SAM is the "Appetite Test" using RUTF (Ready-to-Use Therapeutic Food) to decide between inpatient and outpatient care. * **Target MUAC:** The cut-off for discharge from a SAM treatment program is usually MUAC ≥ 125 mm.

Question 225: The Mid-day Meal Programme aims to provide what proportion of daily caloric and protein requirements?

A. One-third of calories, one-third of proteins
B. One-half of calories, one-third of proteins
C. One-half of calories, one-half of proteins
D. One-third of calories, one-half of proteins (Correct Answer)

Explanation: ### Explanation The **Mid-day Meal (MDM) Programme**, now part of the **PM POSHAN Scheme**, is designed to improve the nutritional status of school-age children. The core objective is to supplement the child's home diet to ensure they receive a significant portion of their daily nutritional needs at school. **1. Why Option D is Correct:** The program is scientifically structured to provide: * **Calories:** **One-third (1/3rd)** of the total daily energy requirement. * **Proteins:** **One-half (1/2)** of the total daily protein requirement. This distribution acknowledges that while energy (calories) can be derived from various sources at home, protein—essential for growth and cognitive development—is often deficient in the diets of children from lower socioeconomic backgrounds. Therefore, a higher proportion of protein is prioritized in the school meal. **2. Analysis of Incorrect Options:** * **Option A:** Incorrect. While 1/3rd of calories is correct, 1/3rd of protein is insufficient to meet the program's nutritional goals. * **Options B & C:** Incorrect. Providing one-half of daily calories is not the mandate of the MDM; it is intended as a supplement, not a total replacement for home meals. **3. High-Yield Clinical Pearls for NEET-PG:** * **Nutritional Norms (Per Day):** * **Primary (Class I-V):** 450 Calories and 12g Protein. * **Upper Primary (Class VI-VIII):** 700 Calories and 20g Protein. * **Iron & Folic Acid:** Under the Weekly Iron and Folic Acid Supplementation (WIFS) program, school children also receive IFA tablets (Pink for Primary, Blue for Adolescents). * **Mandate:** The meal must be served for at least **200 days** for primary and **220 days** for upper primary sections in a year.

Question 226: The pasteurization of milk is determined by which of the following tests?

A. Methylene blue reduction test
B. Phosphatase test (Correct Answer)
C. Turbidity test
D. Resazurin test

Explanation: **Explanation:** The **Phosphatase test** is the gold standard for determining the efficiency of pasteurization. This test is based on the principle that the enzyme **Alkaline Phosphatase (ALP)** is naturally present in raw milk and has a heat-resistance profile slightly higher than that of the most heat-resistant non-spore-forming pathogen, *Coxiella burnetii*. If pasteurization is performed correctly (heating to 63°C for 30 mins or 72°C for 15 seconds), ALP is completely inactivated. Therefore, a negative phosphatase test indicates successful pasteurization, while a positive result suggests inadequate heating or post-pasteurization contamination with raw milk. **Analysis of Incorrect Options:** * **Methylene Blue Reduction Test (MBRT):** This test assesses the **bacteriological quality** (microbial load) of raw milk. It measures the time taken for bacteria to decolorize the dye; a shorter time indicates higher bacterial contamination. * **Turbidity Test:** This is used specifically for **sterilized milk** (not pasteurized milk). It checks if the milk has been heated to at least 100°C, which denatures all heat-coagulable proteins (albumin). * **Resazurin Test:** This is a **rapid screening test** for the sanitary quality of milk. It is similar to MBRT but provides results much faster (within 10–60 minutes). **High-Yield NEET-PG Pearls:** * **Phosphatase Test:** Checks efficiency of Pasteurization. * **Turbidity Test:** Checks efficiency of Sterilization. * **Standard Pasteurization Methods:** 1. **Holder Method:** 63°C for 30 mins. 2. **HTST (High-Temperature Short-Time):** 72°C for 15 seconds. * **Target Organism:** Pasteurization aims to kill *Mycobacterium bovis*, but *Coxiella burnetii* (Q fever) is the most heat-resistant pathogen used as the benchmark for temperature settings.

Question 227: What is the daily recommended intake of protein per kilogram of body weight?

A. 1 gm/kg body weight (Correct Answer)
B. 1.2 gm/kg body weight
C. 2 gm/kg body weight
D. 2.5 gm/kg body weight

Explanation: **Explanation:** The correct answer is **A. 1 gm/kg body weight**. In Community Medicine and Nutrition, the Recommended Dietary Allowance (RDA) for protein for a healthy Indian adult is traditionally calculated as **1 gm per kg of ideal body weight per day**. This value is designed to maintain a positive nitrogen balance and cover the physiological requirements for tissue repair and metabolic functions in 97.5% of the population. While recent ICMR-NIN (2020) guidelines have slightly revised the RDA to approximately **0.83 gm/kg/day**, for the purpose of NEET-PG and standard textbook references (like Park’s PSM), **1 gm/kg** remains the gold-standard benchmark for general adult requirements. **Analysis of Incorrect Options:** * **B. 1.2 gm/kg:** This represents an increased requirement typically seen in elderly individuals to prevent sarcopenia, or in moderate-intensity athletes. It is not the baseline for the general population. * **C. 2 gm/kg:** This high intake is usually reserved for elite strength athletes or patients in hypermetabolic states (e.g., severe burns or sepsis) to counteract massive catabolism. * **D. 2.5 gm/kg:** This is near the upper limit of protein safety. Chronic intake at this level can strain renal function and is not a standard recommendation. **High-Yield Clinical Pearls for NEET-PG:** * **Net Protein Utilization (NPU):** For Indian diets, the NPU is generally lower (around 65) compared to animal protein (egg protein NPU is 100). * **Pregnancy/Lactation:** Protein requirements increase significantly during these stages (Add +9.5 g/day in the second trimester and +22.9 g/day in the third trimester). * **Reference Protein:** Egg protein is considered the "Reference Protein" because of its high biological value and utilization. * **Pulse-Cereal Ratio:** To achieve an ideal amino acid profile (Lysine from pulses and Methionine from cereals), a ratio of **1:4** is recommended.

Question 228: Which of the following has the highest protein content per 100 grams?

A. Egg
B. Groundnut
C. Soyabean (Correct Answer)
D. Meat

Explanation: **Explanation:** The protein content of food is determined by the amount of nitrogenous matter present per 100 grams of the edible portion. **Soyabean** is recognized as the richest plant-based source of protein, containing approximately **40-43 grams of protein per 100g**. It is often referred to as "the meat of the field" due to its high protein density and balanced amino acid profile. **Analysis of Options:** * **Soyabean (43g/100g):** Highest protein content among all common food sources. It is also rich in isoflavones and fiber. * **Groundnut (26g/100g):** While a very good source of protein and fats, it falls significantly short of soyabean. * **Meat (18-22g/100g):** Though it provides "First Class" (complete) proteins with high biological value, the absolute quantity per 100g is lower than that of legumes like soyabean and groundnut. * **Egg (13g/100g):** Despite having the highest **Biological Value (100)** and being the "Reference Protein," the actual quantity of protein per 100g is relatively low compared to pulses and meat. **High-Yield Clinical Pearls for NEET-PG:** 1. **Reference Protein:** Egg is considered the reference protein because it contains all essential amino acids in the ideal proportion for human growth. 2. **Limiting Amino Acids:** Pulses (including Soyabean) are deficient in **Methionine** but rich in Lysine. Cereals are deficient in **Lysine** but rich in Methionine. This is the basis for "Pulse-Cereal supplementation." 3. **Net Protein Utilization (NPU):** Egg has the highest NPU (~94), while Soyabean has an NPU of ~61. 4. **Biological Value (BV):** Egg (100) > Milk (84) > Meat (80) > Soyabean (75).

Question 229: What is the formula for Quetelet's index?

A. Weight divided by height
B. Height divided by the cube root of weight
C. Height minus 100
D. Weight divided by the square of height (Correct Answer)

Explanation: **Explanation:** The **Quetelet’s Index**, more commonly known as the **Body Mass Index (BMI)**, is the most widely used anthropometric indicator to assess nutritional status in adults. **1. Why Option D is Correct:** The formula for Quetelet’s Index is **Weight (kg) / Height² (m²)**. It was developed by Adolphe Quetelet and is designed to correlate body mass with height to categorize individuals into underweight, normal, overweight, or obese categories. It is a proxy measure for body fatness because it correlates moderately with more direct measures of body fat. **2. Analysis of Incorrect Options:** * **Option A (Weight/Height):** This is a simple ratio but does not account for the proportional increase in mass relative to surface area as height increases. * **Option B (Height / ∛Weight):** This is the formula for the **Ponderal Index** (also known as the Rohrer's Index), often used in pediatrics or to assess fetal growth restriction. * **Option C (Height - 100):** This is **Broca’s Index**, a quick bedside method to calculate "Ideal Body Weight" (IBW) in kilograms. **3. High-Yield Clinical Pearls for NEET-PG:** * **WHO BMI Classification:** * Underweight: <18.5 * Normal: 18.5–24.9 * Overweight: 25–29.9 * Obese: ≥30 * **Asian-Indian Specific Criteria:** Due to higher risk of metabolic syndrome at lower BMIs, the cutoff for "Overweight" in Indians is **≥23 kg/m²** and "Obese" is **≥25 kg/m²**. * **Corpulence Index:** Another name for the Ponderal Index. * **Limitation:** BMI does not distinguish between muscle mass and fat mass (e.g., it may overestimate adiposity in athletes).

Question 230: What is the active principal of Lathyrus sativa?

A. Pyrrolizidine
B. Sanguinarine
C. BOAA (Correct Answer)
D. Jhunjhunia

Explanation: **Explanation:** **Lathyrus sativa** (Khesari dal) is a pulse that, when consumed in large quantities (over 30% of total calorie intake) for 2–6 months, leads to **Lathyrism**, a crippling neurological disease characterized by spastic paraplegia. 1. **Why BOAA is correct:** The active neurotoxic principle in *Lathyrus sativa* is **BOAA** (Beta-oxalyl-amino-alanine), also known as **ODAP** (Oxalyldiaminopropionic acid). It acts as a glutamate analogue, causing excitotoxicity of the upper motor neurons in the spinal cord, leading to permanent damage. 2. **Why other options are incorrect:** * **Pyrrolizidine:** These alkaloids are found in *Crotalaria* seeds (Jhunjhunia) and are responsible for **Veno-Occlusive Disease (VOD)** of the liver. * **Sanguinarine:** This is the toxic alkaloid found in **Argemone mexicana** (Prickly poppy) seeds. It contaminates mustard oil and causes **Epidemic Dropsy**, characterized by bilateral edema, cardiac failure, and glaucoma. * **Jhunjhunia:** This is the common name for *Crotalaria spectabilis/retusa* seeds, which contaminate food grains and cause VOD, not the toxin itself. **High-Yield Clinical Pearls for NEET-PG:** * **Stages of Lathyrism:** Non-stick stage → Stick stage → Two-stick stage → Crawler stage. * **Prevention:** The safest method to remove BOAA is **parboiling** (steeping the pulse in hot water) or **sun-drying**. * **Lathyrism** primarily affects young adult males (15–45 years). * **Epidemic Dropsy** is associated with **Sanguinarine** and **AOAC** (Argemone Oil Adulteration Test) like the Nitric Acid test.

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

Practice Questions

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

Practice Questions

Nutrition in Emergencies

Practice Questions

Food Fortification and Supplementation

Practice Questions

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