Nutrition and Health Practice Questions

Q: What is the recommended daily intake of dietary fiber?

40 grams. **Explanation:** The correct answer is **40 grams**. According to the Indian Council of Medical Research (ICMR) and the National Institute of Nutrition (NIN) guidelines, the recommended dietary allowance (RDA) for fiber is approximately **40 g/2000 kcal/day**. **Why 40 grams is correct:** Dietary fiber consists of non-starch polysaccharides (like cellulose, hemicellulose, and pectin) and lignin that are resistant to human digestive enzymes. A daily intake of 40g is recommended to maintain optimal gastrointestinal health, ensure adequate stool bulk, and provide metabolic benefits such as lowering glycemic index and reducing LDL cholesterol. **Why other options are incorrect:** * **20 grams:** While some international guidelines (like the AHA) suggest a minimum of 25–30g, 20g is considered insufficient for the high-carbohydrate Indian diet to effectively prevent lifestyle diseases. * **80 grams & 100 grams:** These values are excessively high. While high-fiber diets are beneficial, exceeding 50–60g/day can lead to malabsorption of essential micronutrients (like calcium, iron, and zinc) due to the presence of phytates and oxalates, and may cause significant abdominal bloating or intestinal obstruction. **High-Yield Clinical Pearls for NEET-PG:** * **Soluble Fiber (e.g., Pectin, Gums):** Delays gastric emptying and lowers blood cholesterol by binding bile acids. * **Insoluble Fiber (e.g., Cellulose, Lignin):** Increases stool bulk and decreases intestinal transit time; protective against colon cancer and diverticulosis. * **Caloric Value:** Fiber provides approximately **2 kcal/g** through the production of Short-Chain Fatty Acids (SCFAs) like butyrate by colonic bacteria. * **Crude Fiber vs. Dietary Fiber:** Dietary fiber values are usually 2–3 times higher than crude fiber values.

Q: Lathyrism is seen with eating of:

Kesari dhal. **Explanation:** **Lathyrism** is a form of permanent spastic paralysis caused by the excessive consumption of **Kesari dhal (*Lathyrus sativus*)**. It is a classic topic in Community Medicine, often linked to socio-economic factors where this hardy, drought-resistant pulse becomes a staple diet during famines. 1. **Why Kesari dhal is correct:** The seeds of *Lathyrus sativus* contain a potent neurotoxin called **BOAA (Beta-oxalyl-amino-alanine)**, also known as ODAP. Chronic ingestion (usually >300g daily for 6 months) leads to the destruction of upper motor neurons in the spinal cord, resulting in **Neurolathyrism**. This presents as a gradual onset of spastic paraplegia, characterized by a "scissor gait." 2. **Why other options are incorrect:** * **Red gram:** Also known as Arhar dhal, it is a common protein source and does not contain neurotoxins. * **Mushrooms:** Ingestion of poisonous mushrooms (e.g., *Amanita phalloides*) causes **Mycetism**, leading to acute gastrointestinal or hepatic failure, not lathyrism. * **Sausages:** Improperly preserved sausages are associated with **Botulism** (caused by *Clostridium botulinum* toxin), which presents as acute flaccid paralysis, the opposite of the spasticity seen in lathyrism. **High-Yield Clinical Pearls for NEET-PG:** * **Stages of Lathyrism:** Latent stage → No-stick stage → One-stick stage → Two-stick stage → Crawler stage. * **Prevention:** The safest method to remove BOAA is **steeping (soaking in hot water)** or **parboiling**. * **Legal aspect:** The PFA Act once banned Kesari dhal, but newer low-BOAA varieties are being developed. * **Differential:** Do not confuse with **Endemic Ascites**, which is caused by Pyrrolizidine alkaloids in *Jhansia* (Crotalaria) seeds contaminating millet.

Q: As per ICDS, what is the recommended daily intake of calories and proteins for children aged 3-6 years?

500 kcal and 15 gm of proteins. **Explanation:** The Integrated Child Development Services (ICDS) scheme provides supplementary nutrition to bridge the gap between the actual average intake and the recommended dietary allowance (RDA). For children aged **3 to 6 years**, the supplementary nutrition is provided in the form of a morning snack and a Hot Cooked Meal (HCM). **1. Why Option D is Correct:** According to the revised nutritional norms of the ICDS (under the POSHAN Abhiyaan), the daily supplementary nutrition for children in the 3–6 years age group must provide **500 kcal of energy and 12–15 grams of protein**. This is designed to meet approximately 1/3rd of their daily calorie requirement and 1/2 of their daily protein requirement. **2. Analysis of Incorrect Options:** * **Options A, B, and C:** These values are outdated or represent older guidelines. Previously, the norm for children was 300 kcal and 8–10g of protein. However, current guidelines have scaled these requirements upward to combat malnutrition more effectively. * **Note on 300 kcal/10g protein:** This specific value (300 kcal/8-10g protein) is now the standard for children aged **6 months to 72 months (6 years)** under the "Take Home Ration" (THR) category, but for the 3-6 year old group attending Anganwadis, the 500 kcal/15g protein standard is the specific target for the combined snack and meal. **3. High-Yield Facts for NEET-PG:** * **Severely Malnourished Children (6m–6y):** They receive **800 kcal and 20–25g of protein**. * **Pregnant & Lactating Mothers:** They receive **600 kcal and 18–20g of protein**. * **Adolescent Girls (SABLA):** They receive **600 kcal and 18–20g of protein**. * **Costing:** The financial norm is currently ₹8.00 per child per day for normal children and ₹12.00 for severely malnourished children. * **Beneficiaries:** ICDS covers children (0-6 years), pregnant women, and lactating mothers.

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

2.8 mg/day. **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.

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

Phosphatase test. **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.

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

1 gm/kg body weight. **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.

Q: What is the formula for Quetelet's index?

Weight divided by the square of height. **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).

Q: Which food item contains the maximum amount of protein?

Soybean. **Explanation:** The correct answer is **Soybean**. In the context of nutritional biochemistry, protein content is measured by the amount of protein per 100 grams of the food item. 1. **Why Soybean is Correct:** Soybean is the richest plant-based source of protein. It contains approximately **40–43 grams of protein per 100g**. It is considered a "complete" plant protein because it contains all essential amino acids, making it a vital meat substitute in vegetarian diets. 2. **Analysis of Incorrect Options:** * **Egg:** While eggs have the highest **Biological Value (BV = 94)** and are considered the "Reference Protein" due to their superior amino acid profile and digestibility, they contain only about **13g of protein per 100g**. * **Wheat:** As a cereal, wheat contains roughly **11–12g of protein per 100g**. It is limiting in the essential amino acid Lysine. * **Rice:** Rice has the lowest protein content among the options, approximately **6–7g per 100g**. However, rice protein has a high biological value compared to other cereals. **High-Yield NEET-PG Pearls:** * **Highest Protein Quantity:** Soybean (~43%). * **Highest Protein Quality (Reference Protein):** Egg (used as a standard to compare other proteins). * **Net Protein Utilization (NPU):** Egg has the highest NPU (~96), followed by Milk (~81). * **Limiting Amino Acids:** Cereals are generally deficient in **Lysine**, while Pulses are deficient in **Methionine**. Combining them (e.g., Dal-Chawal) provides a complete amino acid profile (Supplementary action of proteins). * **Pulse Protein:** Most pulses contain about 20–25% protein.

Q: As per ICMR, what is the recommended protein intake for an adult male?

1 g/kg. **Explanation:** The recommended dietary allowance (RDA) for protein is based on the amount needed to maintain nitrogen balance and support physiological functions. According to the **ICMR-NIN (2020) guidelines**, the recommended protein intake for a healthy adult male (and female) is **1.0 g/kg body weight/day**. This value is derived from the estimated average requirement (EAR) of 0.83 g/kg/day, adjusted for two standard deviations to cover 97.5% of the population. **Analysis of Options:** * **A. 1 g/kg (Correct):** This is the current ICMR-NIN 2020 recommendation for adults. It ensures adequate amino acid supply for tissue repair and enzyme synthesis. * **B. 1.16 g/kg (Incorrect):** This value was the previous recommendation (ICMR 1990/2010). It was revised downward in the 2020 update based on newer meta-analyses of nitrogen balance studies. * **C. 1.5 g/kg (Incorrect):** This level is typically reserved for physiological stress, such as moderate illness or recovery from surgery, but is not the standard RDA for a healthy adult. * **D. 1.69 g/kg (Incorrect):** This is significantly higher than the RDA and may be seen in specific athletic training or severe catabolic states (e.g., major burns), but it is not the ICMR standard. **High-Yield Facts for NEET-PG:** * **Net Dietary Protein Calories % (NDP Cal%):** For an ideal diet, protein should contribute **10-12%** of total energy intake. * **Reference Protein:** Egg protein is considered the reference protein (Biological Value = 100). * **Specific Dynamic Action (SDA):** Protein has the highest SDA (~30%), meaning it requires more energy for digestion compared to fats or carbohydrates. * **Limiting Amino Acids:** Pulses are deficient in **Methionine**, while Cereals are deficient in **Lysine**. Consuming them together (Cereal-Pulse combination) provides a complete amino acid profile.

Question 1

What is the recommended daily intake of dietary fiber?

Accepted Answer

40 grams

Answer

20 grams

Answer

80 grams

Answer

100 grams

Question 2

Lathyrism is seen with eating of:

Accepted Answer

Kesari dhal

Answer

Red gram

Answer

Mushrooms

Answer

Sausages

Question 3

As per ICDS, what is the recommended daily intake of calories and proteins for children aged 3-6 years?

Accepted Answer

500 kcal and 15 gm of proteins

Answer

200 kcal and 10 gm of proteins

Answer

300 kcal and 10 gm of proteins

Answer

250 kcal and 10 gm of proteins

Question 4

What is the daily iron requirement for a pregnant woman?

Accepted Answer

2.8 mg/day

Answer

1.6 mg/day

Answer

4 mg/day

Answer

65 mg/day

Question 5

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

Accepted Answer

Weight for age < -3 Z score

Answer

Mid-upper arm circumference (MUAC) < 115 mm

Answer

Presence of bipedal edema

Answer

Presence of visible severe wasting

Question 6

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

Accepted Answer

Phosphatase test

Answer

Methylene blue reduction test

Answer

Turbidity test

Answer

Resazurin test

Question 7

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

Accepted Answer

1 gm/kg body weight

Answer

1.2 gm/kg body weight

Answer

2 gm/kg body weight

Answer

2.5 gm/kg body weight

Question 8

What is the formula for Quetelet's index?

Accepted Answer

Weight divided by the square of height

Answer

Weight divided by height

Answer

Height divided by the cube root of weight

Answer

Height minus 100

Question 9

Which food item contains the maximum amount of protein?

Accepted Answer

Soybean

Answer

Egg

Answer

Rice

Answer

Wheat

Question 10

As per ICMR, what is the recommended protein intake for an adult male?

Accepted Answer

1 g/kg

Answer

1.16 g/kg

Answer

1.5 g/kg

Answer

1.69 g/kg

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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