Nutrition and Health Practice Questions

Q: Endemic cretinism is seen when Iodine uptake is less than?

20 micrograms/day. **Explanation:** The correct answer is **20 micrograms/day**. **1. Underlying Medical Concept:** Iodine is essential for the synthesis of thyroid hormones (T3 and T4), which are critical for fetal brain development. According to the WHO and global epidemiological studies, **Endemic Cretinism**—characterized by irreversible mental retardation, deaf-mutism, and motor spasticity—typically appears in a population only when the environmental iodine deficiency is severe. Specifically, it manifests when the average daily iodine intake falls below **20 µg/day**. At this critical threshold, the thyroid gland can no longer maintain euthyroidism, leading to profound developmental consequences in the offspring of iodine-deficient mothers. **2. Analysis of Options:** * **A (5 µg/day):** This represents extreme deficiency, but the clinical threshold for the onset of endemic cretinism is established at the higher level of 20 µg/day. * **C & D (50 & 75 µg/day):** While these levels are below the RDA (150 µg/day), they generally result in **Goiter** (compensatory enlargement) rather than the severe neurological damage seen in cretinism. Goiter prevalence increases when intake is 5% in school-age children. * **Urinary Iodine Excretion (UIE):** The most common indicator. Normal is >100 µg/L. Severe deficiency is <20 µg/L. * **Neonatal TSH:** Best indicator for monitoring the impact of iodine prophylaxis. * **Iodized Salt:** Contains 30 ppm of iodine at the production level and 15 ppm at the consumer level.

Q: The vitamin A supplement administered in the 'Prevention of nutritional blindness in children programme' contains:

1 Lakh IU/ml. ### Explanation **1. Why 1 Lakh IU/ml is Correct:** The National Prophylaxis Programme Against Nutritional Blindness due to Vitamin A Deficiency (now integrated into the RMNCH+A strategy) uses a concentrated **oil-based solution** of Vitamin A (Retinyl palmitate). The standard formulation provided by the government is **1 Lakh IU per 1 ml**. This concentration is designed for ease of administration using a standardized 2 ml spoon: * **Infants (6–11 months):** Receive a half-spoon dose (1 ml), which equals **1 Lakh IU**. * **Children (1–5 years):** Receive a full-spoon dose (2 ml), which equals **2 Lakh IU**. **2. Why Other Options are Incorrect:** * **25,000 IU/ml:** This concentration is too low for mass prophylaxis. It would require administering 4–8 ml of oil, increasing the risk of aspiration in young children. * **3 Lakh IU/ml and 5 Lakh IU/ml:** These concentrations are excessively high. High-dose Vitamin A can lead to acute toxicity (Hypervitaminosis A), characterized by bulging fontanelles, vomiting, and increased intracranial pressure. **3. High-Yield Clinical Pearls for NEET-PG:** * **Schedule:** The first dose is given at **9 months** (with Measles/MR vaccine). Subsequent doses are given every **6 months** up to the age of 5 years. * **Total Doses:** A child receives a total of **9 doses** (1 + 8). * **Total Cumulative Dose:** 1 Lakh (1st dose) + [8 doses × 2 Lakh] = **17 Lakh IU**. * **Target Age Group:** 6 months to 5 years (though the first routine dose starts at 9 months). * **Treatment Dose:** For clinical Xerophthalmia (Bitot's spots/Night blindness), the schedule is **2 Lakh IU** orally on Day 0, Day 1, and Day 14 (Age <1 year: 1 Lakh IU).

Q: Cereals are deficient in which of the following micronutrients?

Vitamin C. ### Explanation **Correct Option: A (Vitamin C)** Cereals (such as wheat, rice, and maize) are the staple diet in many regions but are naturally **deficient in Vitamin C (Ascorbic acid)** and Vitamin A. While cereals are excellent sources of carbohydrates and certain B vitamins, they do not contain Vitamin C in their dry state. * **High-Yield Note:** Vitamin C only appears in pulses and cereals during the process of **germination (sprouting)**. This is a frequent NEET-PG point: sprouting increases the Vitamin C and B-complex content of grains. **Analysis of Incorrect Options:** * **B. Vitamin B complex:** Cereals are actually a **rich source** of the Vitamin B complex, particularly Thiamine (B1), Riboflavin (B2), and Niacin (B3). However, excessive polishing of rice can lead to the loss of Thiamine, potentially causing Beriberi. * **C. Iron:** Cereals do contain iron, although its bioavailability is often low due to the presence of **phytates**, which inhibit absorption. * **D. Calcium:** Most cereals contain moderate amounts of calcium. Notably, **Ragi (Finger millet)** is an exceptionally rich source of calcium (344 mg/100g), making this option incorrect. **Clinical Pearls for NEET-PG:** 1. **Limiting Amino Acids:** Cereals are deficient in **Lysine** but rich in Methionine. Conversely, Pulses are deficient in Methionine but rich in Lysine. This is why a cereal-pulse combination provides "complete protein." 2. **Maize & Pellagra:** Maize is deficient in **Tryptophan** (a precursor to Niacin). Diets solely based on maize can lead to Pellagra (the 4 Ds: Dermatitis, Diarrhea, Dementia, Death). 3. **Fortification:** Because cereals are staples, they are the preferred vehicle for large-scale fortification programs (e.g., adding Iron, Folic acid, and B12 to rice/flour).

Q: Endemic ascites cases reported from Madhya Pradesh in 1976 were caused due to which of the following?

Crotalaria. ### Explanation The correct answer is **Crotalaria**. **1. Why Crotalaria is Correct:** The 1976 outbreak of **Endemic Ascites** in the Sarguja district of Madhya Pradesh (and parts of Maharashtra) was caused by the consumption of **Pyrrolizidine alkaloids**. These toxins were found in the seeds of the weed *Crotalaria nana* (locally known as *Jhunjhunia*), which accidentally contaminated the staple food crop, **Millet** (*Panicum miliare*). The underlying medical concept is **Veno-Occlusive Disease (VOD)**. The alkaloids cause structural damage to the smaller intrahepatic venules, leading to obstruction of hepatic venous outflow. This results in rapid-onset portal hypertension, hepatomegaly, and massive ascites. **2. Why Other Options are Incorrect:** * **A. Fusarium:** This fungus produces **T-2 toxins**, which are responsible for **Alimentary Toxic Aleukia (ATA)**. It is associated with moldy grain and causes bone marrow suppression, not endemic ascites. * **C. Ergot:** Caused by *Claviceps purpurea* infecting Bajra or Rye. It leads to **Ergotism**, characterized by symptoms like vomiting, giddiness, and peripheral gangrene due to vasoconstriction. * **D. Aflatoxin:** Produced by *Aspergillus flavus* (commonly in stored groundnuts/maize). Chronic exposure leads to **Hepatocellular Carcinoma (HCC)** or acute hepatitis, but it was not the cause of the 1976 Madhya Pradesh outbreak. **3. High-Yield Clinical Pearls for NEET-PG:** * **Epidemic Dropsy:** Caused by **Argemone mexicana** (Sanguinarine toxin) contaminating mustard oil. It presents with bilateral pitting edema and cardiac failure. * **Lathyrism:** Caused by **BOAA** (Beta-oxalyl-amino-alanine) in *Lathyrus sativus* (Khesari Dal), leading to spastic paraplegia. * **Veno-Occlusive Disease (VOD):** Always associate "Endemic Ascites" + "Madhya Pradesh" + "Crotalaria" for exam questions.

Q: What is the recommended daily calcium intake for an infant in mg/day?

500. **Explanation:** The correct answer is **500 mg/day**. This value is based on the **ICMR-NIN (2020) Dietary Guidelines** for Indians, which are high-yield for NEET-PG. **Underlying Medical Concept:** Calcium is critical during infancy for rapid skeletal mineralization and neuromuscular function. While breast milk is the primary source of calcium for infants, the Recommended Dietary Allowance (RDA) is set to ensure adequate accretion during this peak growth phase. According to the latest ICMR-NIN guidelines, the RDA for calcium is uniform for infants aged **0–12 months at 500 mg/day**. **Analysis of Options:** * **A (100 mg) & B (200 mg):** These values are significantly below the physiological requirement for an infant's bone development and do not meet the RDA standards. * **C (300 mg):** While older guidelines or international standards (like the US-IOM) might suggest lower Adequate Intake (AI) levels for 0-6 months (approx. 200-260 mg), the **Indian (ICMR) standard** specifically mandates 500 mg/day to account for local dietary patterns and bioavailability. * **D (500 mg):** This is the current recommended value for both 0–6 months and 6–12 months categories in India. **High-Yield Clinical Pearls for NEET-PG:** * **Calcium RDA for Children (1–9 years):** 600 mg/day. * **Calcium RDA for Adolescents (10–18 years):** 1050 mg/day (Highest requirement due to pubertal growth spurt). * **Calcium RDA for Pregnant & Lactating Women:** 1000 mg/day. * **Calcium:Phosphorus Ratio:** The ideal ratio in the diet should be **1:1** (except in infancy where it is 1:1.5). * **Vitamin D:** Essential for calcium absorption; the RDA for all age groups (including infants) is **600 IU/day** (15 μg).

Q: Which food source has the highest protein energy ratio?

Fish. **Explanation:** The **Protein-Energy Ratio (PE Ratio)** is the proportion of total energy (calories) in a food item that is derived from protein. It is calculated as: *(Energy from protein / Total energy in the food) × 100*. **Why Fish is the Correct Answer:** Fish is considered the richest source in terms of PE ratio among the given options. Most varieties of fish (especially white fish) are exceptionally high in high-biological-value protein while being very low in carbohydrates and fats. This results in a high percentage of its total caloric content coming from protein. In clinical nutrition, fish is often cited as having a PE ratio significantly higher than cereals or dairy. **Analysis of Incorrect Options:** * **Egg:** While eggs have the highest **Biological Value (100)** and are the "Reference Protein," they also contain a significant amount of fat (in the yolk). This added fat increases the total energy content, thereby lowering the PE ratio compared to lean fish. * **Milk:** Milk contains a balanced mix of proteins, carbohydrates (lactose), and fats. Because of the high sugar and fat content relative to its protein, its PE ratio is lower than that of flesh foods. * **Wheat:** As a cereal, wheat is primarily a carbohydrate source. Although it contains some protein (gluten), its energy is predominantly derived from starch, leading to a low PE ratio. **High-Yield NEET-PG Pearls:** * **Reference Protein:** Egg (used as a standard for comparing other proteins). * **Highest Biological Value (BV):** Egg (100), followed by Milk (95). * **Net Protein Utilization (NPU):** Highest for Egg (94). * **Limiting Amino Acids:** Wheat is limited in **Lysine**; Pulses are limited in **Methionine**. * **Pulse-Cereal Mix:** The ideal ratio to achieve a balanced amino acid profile is **1:4**.

Q: Golden rice, a genetically modified variety, is primarily developed to address the deficiency of which nutrient?

Vitamin A. **Explanation:** **Golden Rice** is a genetically modified (biofortified) variety of *Oryza sativa* produced to biosynthesize **beta-carotene**, a precursor of **Vitamin A**, in the edible parts of the rice. 1. **Why Vitamin A is correct:** In many developing countries, rice is a staple food but lacks essential micronutrients. By inserting genes from maize and a soil bacterium (*Erwinia uredovora*), scientists enabled the rice grain to produce beta-carotene. Once ingested, the body converts this into Retinol (Vitamin A). This intervention specifically targets **Vitamin A Deficiency (VAD)**, which is a leading cause of preventable childhood blindness and increased mortality from infectious diseases (like measles) in low-income regions. 2. **Why other options are incorrect:** * **Vitamin C:** Deficiencies (Scurvy) are typically managed through the consumption of citrus fruits and fresh vegetables, not cereal biofortification. * **Calcium:** While vital for bone health, calcium deficiency is not the primary target of the Golden Rice project. * **Zinc:** Although "Zinc-fortified rice" exists as a separate biofortification effort to combat stunting and immune dysfunction, it is not the defining characteristic of "Golden Rice." **High-Yield Clinical Pearls for NEET-PG:** * **The "Golden" Color:** The characteristic yellow-orange hue of the grain is due to the presence of carotenoids. * **VAD Manifestations:** The earliest clinical sign is **Conjunctival Xerosis**, while the earliest symptom is **Night Blindness (Nyctalopia)**. **Bitot’s spots** are a pathognomonic sign. * **Public Health Strategy:** Golden Rice is an example of **Biofortification** (breeding crops to increase nutritional value), which differs from *fortification* (adding nutrients during processing, e.g., Iodized salt).

Q: Soya bean contains protein to the tune of:

40%. **Explanation:** Soybean (*Glycine max*) is uniquely classified as both a pulse and an oilseed. It is recognized as the richest plant-based source of complete protein, containing all essential amino acids. **Why 40% is correct:** The average protein content of soybean ranges between **38% to 42%**. This high concentration is nearly double that of other common pulses (like grams or lentils) and significantly higher than animal sources like meat (20%) or eggs (13%). In addition to its 40% protein content, it contains approximately 20% fat (oil) and 30% carbohydrates. **Analysis of Incorrect Options:** * **A (20%):** This is the typical protein content of most other pulses (e.g., Bengal gram, Green gram) and meat. Soybean is significantly more concentrated. * **C & D (60% & 80%):** These values are physiologically impossible for a raw agricultural seed. Such high concentrations are only found in processed supplements like **Soy Protein Isolate**, which is manufactured to contain >90% protein. **High-Yield NEET-PG Pearls:** 1. **Limiting Amino Acid:** Like most legumes, soybean is deficient in **Methionine** (sulfur-containing amino acid) but rich in **Lysine**. It is often used to "supplement" cereal proteins (which are rich in Methionine but deficient in Lysine). 2. **Biological Value:** It has the highest biological value among plant proteins, often compared to casein (milk protein). 3. **Antinutritional Factors:** Raw soybean contains **Trypsin inhibitors**, which interfere with protein digestion. These are heat-labile and destroyed by proper cooking. 4. **Isoflavones:** Soy contains Genistein and Daidzein (phytoestrogens), which are studied for their role in reducing menopausal symptoms and lowering LDL cholesterol.

Q: A patient is classified as obese if their Body Mass Index (BMI) is:

greater than 30. **Explanation:** The Body Mass Index (BMI), or Quetelet index, is the standard epidemiological tool used to classify weight status in adults. It is calculated as weight in kilograms divided by the square of height in meters ($kg/m^2$). According to the **WHO Classification for BMI**: * **Underweight:** < 18.5 * **Normal range:** 18.5 – 24.9 * **Overweight (Pre-obese):** 25.0 – 29.9 * **Obese:** $\geq$ 30.0 **Analysis of Options:** * **Option B (Correct):** A BMI of **30 or greater** is the international threshold for defining obesity. It is further subdivided into Class I (30–34.9), Class II (35–39.9), and Class III ($\geq$ 40). * **Option A:** This range spans from "Normal" to "Overweight." It does not define a specific clinical category. * **Option C:** A BMI > 25 defines the "Overweight" category. While this indicates excess weight, it is not yet classified as clinical obesity. * **Option D:** A BMI > 40 defines **Class III Obesity** (formerly known as Morbid Obesity). While these patients are obese, the definition of obesity begins at 30. **High-Yield Clinical Pearls for NEET-PG:** 1. **Asian-Indian Specific Guidelines:** Due to a higher risk of metabolic syndrome at lower BMIs, the criteria for Indians are lower: **Overweight is 23–24.9** and **Obesity is $\geq$ 25**. 2. **Ponderal Index:** Calculated as $Height\ (cm) / \sqrt[3]{Weight\ (kg)}$. It is considered more sensitive than BMI for certain pediatric assessments. 3. **Waist-Hip Ratio (WHR):** A better indicator of upper body (android) obesity. Risk increases if WHR is **> 0.9 in men** or **> 0.85 in women**.

Question 1

Endemic cretinism is seen when Iodine uptake is less than?

Accepted Answer

20 micrograms/day

Answer

5 micrograms/day

Answer

50 micrograms/day

Answer

75 micrograms/day

Question 2

The vitamin A supplement administered in the 'Prevention of nutritional blindness in children programme' contains:

Accepted Answer

1 Lakh IU/ml

Answer

25,000 IU/ml

Answer

3 Lakh IU/ml

Answer

5 Lakh IU/ml

Question 3

Cereals are deficient in which of the following micronutrients?

Accepted Answer

Vitamin C

Answer

Vitamin B complex

Answer

Iron

Answer

Calcium

Question 4

Endemic ascites cases reported from Madhya Pradesh in 1976 were caused due to which of the following?

Accepted Answer

Crotalaria

Answer

Fusarium

Answer

Ergot

Answer

Aflatoxin

Question 5

What is the recommended daily calcium intake for an infant in mg/day?

Accepted Answer

500

Answer

100

Answer

200

Answer

300

Question 6

Which food source has the highest protein energy ratio?

Accepted Answer

Fish

Answer

Egg

Answer

Wheat

Answer

Milk

Question 7

Golden rice, a genetically modified variety, is primarily developed to address the deficiency of which nutrient?

Accepted Answer

Vitamin A

Answer

Vitamin C

Answer

Calcium

Answer

Zinc

Question 8

Soya bean contains protein to the tune of:

Accepted Answer

40%

Answer

20%

Answer

60%

Answer

80%

Question 9

A patient is classified as obese if their Body Mass Index (BMI) is:

Accepted Answer

greater than 30

Answer

20-30

Answer

greater than 25

Answer

greater than 40

Question 10

Which of the following parameters, when normal, is specific in ruling out malnutrition?

Accepted Answer

Normal lean body mass

Answer

Total body water

Answer

Normal skin fold thickness

Answer

Normal BMI

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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