Nutrition and Health Practice Questions

Q: What is the daily requirement of iron during pregnancy?

35 mg. **Explanation:** The correct answer is **35 mg/day**. This value is based on the **ICMR-NIN (2020) Dietary Guidelines**, which are the current gold standard for NEET-PG questions regarding Indian nutritional requirements. **1. Why 35 mg is correct:** During pregnancy, iron requirements increase significantly to support the expansion of maternal red cell mass, the development of the placenta, and the growth of the fetus. The ICMR-NIN 2020 guidelines recommend **35 mg/day** for pregnant women (increased from the previous 21 mg/day for non-pregnant women). This ensures adequate iron stores to prevent maternal anemia and low birth weight. **2. Why other options are incorrect:** * **1 mg & 2 mg:** These values represent the *absorbed* iron required daily to replace basal losses in non-pregnant adults. Because dietary iron absorption is low (approx. 5–10%), the *oral intake* must be much higher than the physiological requirement. * **3 mg:** This is roughly the physiological requirement (absorbed iron) during the third trimester, but it does not represent the total daily *dietary* intake required. **3. 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 (13 weeks). * **Lactation Requirement:** The iron requirement drops to **21 mg/day** during lactation (same as a non-pregnant woman) because menstruation is often suppressed (lactational amenorrhea). * **Adolescent Girls:** The requirement is **30-32 mg/day** depending on age. * **Absorption:** Vitamin C (Citrus fruits) enhances iron absorption, while phytates (cereals) and tannins (tea/coffee) inhibit it.

Q: What is the concentration of vitamin A supplement administered in the Prevention of Nutritional Blindness in Children Programme?

1 Lakh IU/ml. ### Explanation **Correct Answer: B. 1 Lakh IU/ml** The **National Programme for Prevention of Nutritional Blindness due to Vitamin A Deficiency** utilizes a specific oil-based concentrate 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), totaling **1 Lakh IU**. * **Children (1–5 years):** Receive a full-spoon dose (2 ml), totaling **2 Lakh IU**. **Analysis of Incorrect Options:** * **Option A (25,000 IU/ml):** This is too dilute. Administering a therapeutic dose of 2 Lakh IU would require 8 ml of liquid, increasing the risk of aspiration and making mass distribution inefficient. * **Options C & D (3 Lakh and 5 Lakh IU/ml):** These concentrations are excessively high. Vitamin A is fat-soluble and stored in the liver; such high concentrations significantly increase the risk of acute toxicity (hypervitaminosis A), characterized by vomiting, headache, and bulging fontanelles. **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:** 17 Lakh IU (1 Lakh + [8 × 2 Lakh]). * **Target Age Group:** 6 months to 5 years (60 months). * **Treatment of Xerophthalmia:** If a child shows clinical signs (e.g., Bitot's spots), the treatment schedule is: **Day 0, Day 1, and Day 14** (2 Lakh IU per dose, except for infants <6 months who get 50,000 IU).

Q: Which of the following causes lathyrism?

Kesari dhal. **Explanation:** **Lathyrism** is a non-fungal food toxico-infection caused by the excessive consumption of **Kesari dhal** (*Lathyrus sativus*). It is a form of permanent spastic paraplegia resulting from the neurotoxic effects of the amino acid **BOAA (Beta-oxalyl-amino-alanine)**, also known as ODAP. * **Why Kesari dhal is correct:** This pulse is hardy and drought-resistant, often consumed by low-income groups during food shortages. When it constitutes more than 30% of the total calorie intake for 2–6 months, BOAA causes the death of upper motor neurons, leading to a characteristic "scissor gait." * **Why other options are incorrect:** * **Mung dhal:** This is a standard, safe pulse (*Vigna radiata*) with no known neurotoxic properties. * **Jhunjunia seeds:** These are seeds of *Crotalaria spectabilis*, which contain pyrrolizidine alkaloids. Ingestion leads to **Veno-Occlusive Disease (VOD)** of the liver, not lathyrism. * **Gondhli seeds:** These are weed seeds often found as contaminants in cereals; however, they are not associated with the specific clinical syndrome of 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 and draining) or **parboiling**. * **Epidemiology:** It is most commonly seen in the age group of 5–45 years and is more prevalent in males. * **Differential Diagnosis:** Do not confuse with **Epidemic Dropsy**, which is caused by *Argemone mexicana* (Sanguinarine toxin) contaminating mustard oil.

Q: What is the most sensitive test to detect argemone oil?

Paper chromatography. ### Explanation **Correct Option: A. Paper Chromatography** Argemone oil is a common adulterant found in mustard oil, containing the toxic alkaloid **Sanguinarine**. While several tests exist, **Paper Chromatography** is the most sensitive method because it can detect argemone oil even at concentrations as low as **0.0001%**. It works by separating the alkaloids, which then exhibit a characteristic orange-yellow fluorescence under ultraviolet light. **Analysis of Incorrect Options:** * **B. Nitric Acid Test:** This is a traditional chemical test where a brownish-red color develops at the junction of the oil and nitric acid. While commonly used for screening, its sensitivity is much lower (detects up to 0.25%) compared to chromatography. * **C. Nalgonda Technique:** This is a method used for **defluoridation** of water at the community or household level using alum and lime. It is unrelated to oil adulteration. * **D. Methylene Blue Reduction Test (MBRT):** This test is used to assess the **microbiological quality of milk**. It measures the metabolic activity of bacteria; it is not used for detecting chemical adulterants in oil. **High-Yield Clinical Pearls for NEET-PG:** * **Epidemic Dropsy:** Consumption of argemone-adulterated oil leads to Epidemic Dropsy. * **Clinical Triad:** Bilateral pitting edema of legs, diarrhea, and dyspnea. * **Key Complication:** Glaucoma (specifically open-angle) is a classic late complication. * **Toxic Principle:** Sanguinarine (interferes with oxidation of pyruvic acid, leading to capillary dilatation and leakage). * **Rule of Thumb:** If a question asks for the *standard* or *common* test, think Nitric Acid; if it asks for the *most sensitive* or *confirmatory* test, choose Paper Chromatography.

Q: What is the additional daily energy requirement during pregnancy and lactation, respectively?

350 kcals, 600 kcals. ### Explanation The nutritional requirements of a woman increase significantly during pregnancy and lactation to support fetal growth, placental development, and milk production. According to the **ICMR-NIN (2020) guidelines**, which are the standard for NEET-PG: 1. **Pregnancy:** An additional **+350 kcal/day** is required. This energy is essential for the expansion of maternal tissues (blood volume, uterus, breasts) and the growth of the fetus. 2. **Lactation:** The energy demand is even higher than in pregnancy to sustain exclusive breastfeeding. For the first 6 months (0–6 months), an additional **+600 kcal/day** is recommended. For 6–12 months, the requirement is **+520 kcal/day**. **Analysis of Options:** * **Option B (Correct):** Accurately reflects the ICMR-NIN 2020 recommendations (+350 kcal for pregnancy and +600 kcal for early lactation). * **Option A:** Incorrect. While 350 kcal is correct for pregnancy, it underestimates the metabolic cost of milk production in lactation. * **Option C & D:** Incorrect. 450 kcal is not the standard recommendation for pregnancy in the Indian context (though some international guidelines like WHO/CDC suggest +450 kcal specifically for the *third trimester*). **High-Yield Clinical Pearls for NEET-PG:** * **Protein Requirements (ICMR 2020):** * Pregnancy: +9.5 g (2nd trimester), +22.0 g (3rd trimester). * Lactation: +17.0 g (0–6 months), +13.0 g (6–12 months). * **Iron:** Requirement increases to **27 mg/day** during pregnancy. * **Calcium:** Requirement is **1000 mg/day** for both pregnant and lactating women. * **Weight Gain:** A healthy woman with a normal BMI should ideally gain **10–12 kg** during pregnancy.

Q: What is the net protein utilization of fish?

77%. **Explanation:** **Net Protein Utilization (NPU)** is a key indicator of protein quality, representing the proportion of nitrogen intake that is actually retained by the body for maintenance and growth. It is calculated as: *NPU = Biological Value × Digestibility Coefficient / 100.* 1. **Why 77% is correct:** Fish is considered a high-quality protein source. According to standard nutritional tables (Park’s Textbook of Preventive and Social Medicine), the **NPU of fish is 77%**. This indicates that fish protein is highly digestible and contains an optimal balance of essential amino acids, making it superior to most plant proteins but slightly lower than eggs or milk. 2. **Analysis of Incorrect Options:** * **57% (Option A):** This value is too low for animal proteins. It is closer to the NPU of certain pulses or cereals (e.g., Bengal gram is ~60%). * **67% (Option B):** This is the approximate NPU of **Meat (Chicken/Mutton)**. While meat is a high-quality protein, its NPU is statistically lower than that of fish. * **87% (Option C):** This is the NPU of **Cow’s Milk**. Milk proteins (casein and whey) have a higher retention rate than fish. 3. **High-Yield Clinical Pearls for NEET-PG:** * **Reference Protein:** The **Egg** is the "Gold Standard" with an NPU of **96%** (Biological Value of 100). * **Hierarchy of NPU:** Egg (96) > Milk (87) > **Fish (77)** > Meat (67) > Soy (55-60) > Pulses (45-55). * **Limiting Amino Acids:** Pulses are deficient in Methionine; Cereals are deficient in Lysine. Fish is rich in both, making it an excellent dietary supplement. * **Fish Oil:** Beyond protein, fish is a vital source of Omega-3 fatty acids (EPA and DHA), which are cardioprotective.

Q: What is the best site for measuring skin fold thickness?

Mid triceps. **Explanation:** Skinfold thickness is a widely used anthropometric method to estimate total body fat, as approximately 50% of body fat is located in the subcutaneous layer. **Why Mid-Triceps is the Correct Answer:** The **Mid-triceps** (measured at the midpoint between the acromion process of the scapula and the olecranon process of the ulna) is considered the **best and most practical site** for routine nutritional assessment. It is preferred because: 1. It is easily accessible. 2. It is highly representative of the total subcutaneous fat stores in the body. 3. Standardized reference tables (like the Jelliffe’s standards) are primarily based on triceps measurements. 4. It is less affected by localized edema compared to lower limb sites. **Analysis of Incorrect Options:** * **Subscapular region:** While frequently used in research and to calculate the "sum of skinfolds," it is more difficult to access (requires the patient to turn) and is less sensitive to rapid changes in nutritional status compared to the triceps. * **Abdominal region:** This site is used to assess visceral adiposity and metabolic risk (central obesity), but it is not the standard "best site" for general nutritional screening in community medicine. * **Mid-thighs:** This site is rarely used due to high variability in fat distribution and the influence of muscle mass, making it an unreliable indicator of overall nutritional status. **High-Yield Clinical Pearls for NEET-PG:** * **Instrument:** Skinfold thickness is measured using **Harpenden Calipers** (standard) or **Holtain Calipers**. * **Pressure:** The calipers must exert a constant pressure of **10 g/mm²**. * **Interpretation:** A measurement **<10 mm** in males and **<13 mm** in females is suggestive of malnutrition (undernutrition). * **Mid-Upper Arm Circumference (MUAC):** Often used alongside triceps skinfold to calculate the Mid-Arm Muscle Circumference (MAMC), which reflects protein/muscle reserves.

Q: A 70 kg man with a height of 1.75 m will have a BMI in which range?

Normal. **Explanation:** The Body Mass Index (BMI), or Quetelet index, is a key anthropometric measure used to classify nutritional status in adults. It is calculated using the formula: **BMI = Weight (kg) / [Height (m)]²**. **Step-by-Step Calculation:** 1. **Height²:** $1.75 \times 1.75 = 3.0625$ 2. **BMI:** $70 / 3.0625 \approx \mathbf{22.86\ kg/m^2}$ According to the WHO classification, a BMI between **18.5 and 24.9 kg/m²** is considered **Normal**. Since 22.86 falls within this range, Option D is correct. **Analysis of Incorrect Options:** * **A. Underweight:** Defined as a BMI **< 18.5 kg/m²**. This individual’s BMI is well above this threshold. * **B. Overweight:** Defined as a BMI **≥ 25.0 kg/m²**. This individual would need to weigh more than 76.5 kg to be classified as overweight. * **C. Obese:** Defined as a BMI **≥ 30.0 kg/m²**. This represents a much higher level of adiposity. **High-Yield Clinical Pearls for NEET-PG:** * **Asian-Indian Specific Criteria:** Due to a higher risk of metabolic syndrome at lower BMIs, the revised criteria for Indians are: * *Normal:* 18.0–22.9 kg/m² * *Overweight:* 23.0–24.9 kg/m² * *Obesity:* ≥ 25.0 kg/m² * **Ponderal Index:** Another measure of leanence; calculated as $Weight (kg) / Height (m)^3$. * **Waist-Hip Ratio:** A better predictor of cardiovascular risk than BMI. Significant risk if **> 0.9 in men** or **> 0.85 in women**.

Q: The Holder method of pasteurization is not effective to kill which of the following organisms?

Coxiella. **Explanation:** The **Holder method** (LTLT - Low Temperature Long Time) involves heating milk to **63°C (145°F) for 30 minutes**, followed by rapid cooling to 5°C. The primary objective of pasteurization is to eliminate common milk-borne pathogens. **Why Coxiella is the correct answer:** *Coxiella burnetii* (the causative agent of Q fever) is the **most heat-resistant** non-spore-forming pathogen found in milk. While the Holder method significantly reduces its numbers, it is not consistently effective at killing all organisms because *Coxiella* can survive temperatures up to 63°C. This led to the development of the **HTST (High Temperature Short Time)** method (72°C for 15 seconds), which is specifically designed to ensure the destruction of *Coxiella burnetii*. **Analysis of Incorrect Options:** * **Mycobacteria:** *Mycobacterium bovis* and *M. tuberculosis* were historically the index organisms for pasteurization. They are effectively killed at 63°C for 30 minutes. * **Brucella:** These organisms are highly sensitive to heat and are easily eradicated by the Holder method, preventing the transmission of Brucellosis via raw milk. * **Salmonella:** Like most enteric pathogens, *Salmonella* species are thermolabile and do not survive the standard pasteurization process. **High-Yield Clinical Pearls for NEET-PG:** * **Index Organism:** *Coxiella burnetii* is now considered the index organism to test the efficiency of pasteurization. * **Phosphatase Test:** This test is used to check the efficacy of pasteurization. It works because the enzyme alkaline phosphatase is naturally present in raw milk and is destroyed at temperatures slightly higher than those required to kill *Mycobacteria*. * **Standard Temperatures:** * Holder Method: 63°C for 30 mins. * HTST Method: 72°C for 15 secs. * UHT (Ultra High Temperature): 125°C+ for a few seconds.

Question 1

An agricultural labourer presented with progressive spastic paralysis and was diagnosed with neurolathyrism. This condition results from the consumption of which of the following?

Accepted Answer

Beta-N-oxalyl-L-alpha, beta-diaminopropionic acid (BOAA)

Answer

Aflatoxin

Answer

Pyruvic acid

Answer

Sanguinarine

Question 2

What is the daily requirement of iron during pregnancy?

Accepted Answer

35 mg

Answer

1 mg

Answer

2 mg

Answer

3 mg

Question 3

What is the concentration of vitamin A supplement administered in the Prevention of Nutritional Blindness in Children Programme?

Accepted Answer

1 Lakh IU/ml

Answer

25,000 IU/ml

Answer

3 Lakh IU/ml

Answer

5 Lakh IU/ml

Question 4

Which of the following causes lathyrism?

Accepted Answer

Kesari dhal

Answer

Mung dhal

Answer

Jhunjunia seeds

Answer

Gondhli seeds

Question 5

What is the most sensitive test to detect argemone oil?

Accepted Answer

Paper chromatography

Answer

Nitric acid test

Answer

Nulgonda technique

Answer

Methylene blue reduction test

Question 6

What is the additional daily energy requirement during pregnancy and lactation, respectively?

Accepted Answer

350 kcals, 600 kcals

Answer

350 kcals, 350 kcals

Answer

450 kcals, 600 kcals

Answer

450 kcals, 350 kcals

Question 7

What is the net protein utilization of fish?

Accepted Answer

77%

Answer

57%

Answer

67%

Answer

87%

Question 8

What is the best site for measuring skin fold thickness?

Accepted Answer

Mid triceps

Answer

Subscapular region

Answer

Abdominal region

Answer

Mid thighs

Question 9

A 70 kg man with a height of 1.75 m will have a BMI in which range?

Accepted Answer

Normal

Answer

Underweight

Answer

Overweight

Answer

Obese

Question 10

The Holder method of pasteurization is not effective to kill which of the following organisms?

Accepted Answer

Coxiella

Answer

Brucella

Answer

Mycobacteria

Answer

Salmonella

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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