Nutrition and Health Practice Questions

Q: Height in centimeters divided by the cube root of body weight is also known as which index?

Ponderal index. **Explanation:** The correct answer is **C. Ponderal Index**. The **Ponderal Index (PI)**, also known as the Rohrer's Index, is a measure of leanness or "corpulence" of a person. It is calculated using the formula: $$\text{Ponderal Index} = \frac{\text{Height (cm)}}{\sqrt[3]{\text{Weight (kg)}}}$$ Unlike the Body Mass Index (BMI), which scales weight to the square of height, the Ponderal Index uses the cube root, making it more mathematically valid for assessing body composition across different heights, especially in newborns and pediatrics. **Analysis of Incorrect Options:** * **A. Quetelet Index:** This is the most common synonym for **Body Mass Index (BMI)**. It is calculated as $\text{Weight (kg)} / \text{Height (m)}^2$. It is the gold standard for epidemiological studies of obesity. * **B. Broca Index:** A simple formula used to estimate "Ideal Body Weight." It is calculated as: $\text{Height (cm)} - 100$. (e.g., if height is 170 cm, ideal weight is 70 kg). * **D. Corpulence Index:** While sometimes used interchangeably with Ponderal Index in older literature, in modern nutritional assessment, the Corpulence Index (or Kaup Index) specifically refers to the formula $\text{Weight (g)} / \text{Height (cm)}^2$, often used in infants. **High-Yield Clinical Pearls for NEET-PG:** * **Lorentz’s Formula:** A more refined version of the Broca index: $\text{Height (cm)} - 100 - [(\text{Height} - 150) / 4 \text{ (for males) or } 2 \text{ (for females)}]$. * **Best indicator of overweight in children:** BMI-for-age (Z-scores). * **Waist-Hip Ratio (WHR):** A WHR $>0.9$ in men and $>0.85$ in women indicates upper body (android) obesity and increased cardiovascular risk. * **Most sensitive marker of central obesity:** Waist circumference.

Q: Which food source has the highest biological value?

Egg. **Explanation:** The **Biological Value (BV)** of a protein is a measure of the proportion of absorbed protein from a food which becomes incorporated into the proteins of the organism's body. It essentially measures how efficiently the body utilizes the dietary protein. **1. Why Egg is the Correct Answer:** The **Egg** is considered the "Gold Standard" in nutrition because it contains all essential amino acids in the correct proportions required by the human body. It has a **Biological Value of approximately 94–96%** (often rounded to 100 in comparative indices). Because of its near-perfect amino acid profile, it is used as the reference protein against which all other food proteins are compared. **2. Analysis of Incorrect Options:** * **Milk:** While milk is a high-quality animal protein, its BV is approximately **84–90%**. It is slightly lower than egg because it is relatively lower in sulfur-containing amino acids. * **Soyabean:** This is the best plant-based protein source, but its BV is around **70–75%**. Like most legumes, it is deficient in methionine. * **Pulses:** Most pulses have a BV ranging from **50–70%**. They are generally limiting in methionine and cysteine, though they are rich in lysine. **3. NEET-PG High-Yield Pearls:** * **Net Protein Utilization (NPU):** For Egg, NPU is **100**, making it the most efficiently utilized protein. * **Reference Protein:** Egg is the standard reference protein used by the WHO. * **Limiting Amino Acids:** * Pulses/Cereals: Pulses are low in Methionine; Cereals are low in Lysine. * **Pulse-Cereal Mix:** Combining them (e.g., Khichdi) provides a complete amino acid profile (Supplementary action of proteins). * **Highest Protein Content:** While Egg has the highest *quality* (BV), **Soyabean** has the highest *quantity* of protein (approx. 40g/100g).

Q: Which of the following processes prevents lathyrism from Khesari dal?

Parboiling. **Explanation:** **Lathyrism** is a condition caused by the excessive consumption of *Lathyrus sativus* (Khesari dal), which contains the neurotoxin **BOAA (Beta-oxalyl-amino-alanine)**. To make the dal safe for consumption, the toxin must be removed. 1. **Why Parboiling is Correct:** **Parboiling** (steeping the seeds in hot water) is the most effective method for large-scale detoxification. BOAA is a water-soluble toxin. During parboiling, the dal is soaked in hot water for several hours and then drained. This process leaches out approximately **90% of the BOAA**, making the dal safe for consumption. 2. **Why Other Options are Incorrect:** * **Filtration:** This is a physical separation process used for liquids and solids; it has no effect on chemical toxins embedded within a seed. * **Sunlight exposure:** While UV rays can degrade some toxins, BOAA is heat-stable and resistant to light; sunlight does not neutralize it. * **Soaking:** While simple soaking in cold water can remove some toxin, it is significantly less efficient than parboiling or "steeping" in hot water, which is the standardized recommended preventive measure. **Clinical Pearls for NEET-PG:** * **The Toxin:** BOAA is also known as **ODAP** (Oxalyldiaminopropionic acid). * **Clinical Presentation:** It causes **Spastic Paraplegia** (upper motor neuron lesion) due to the destruction of pyramidal tracts. * **Stages:** It progresses through four stages: Latent, No-stick, One-stick, Two-stick, and Crawler stage. * **Lathyrism vs. Epidemic Dropsy:** Do not confuse these. Lathyrism is caused by Khesari dal (BOAA), while Epidemic Dropsy is caused by **Argemone mexicana** (Sanguinarine toxin) contaminating mustard oil. * **Home Method:** Another effective method is "Steeping," where dal is soaked in boiling water for 30–60 minutes and the water is discarded.

Q: According to WHO, what is the cut-off for the diagnosis of anemia in non-pregnant females?

12 g%. **Explanation:** The diagnosis of anemia is based on hemoglobin (Hb) levels falling below the established physiological requirements for an individual's age, sex, and physiological status (like pregnancy). According to the **WHO criteria**, the cut-off for anemia in **non-pregnant females (≥15 years of age)** is **<12 g/dL**. * **Why Option D is correct:** In non-pregnant adult females, the lower limit of normal hemoglobin is set at 12 g/dL. This threshold accounts for menstrual blood loss and lower androgen levels compared to males. * **Why Option C is incorrect:** **11 g/dL** is the WHO cut-off for **pregnant women** and **children aged 6–59 months**. During pregnancy, hemodilution (disproportionate increase in plasma volume over red cell mass) leads to a lower physiological cut-off. * **Why Option B is incorrect:** **10 g/dL** is often used as a threshold for "moderate anemia" (7.0–9.9 g/dL) but is not the diagnostic cut-off for the presence of anemia. * **Why Option A is incorrect:** **7 g/dL** is the threshold for **severe anemia**. Patients with Hb <7 g/dL often require urgent intervention or blood transfusion. **High-Yield Facts for NEET-PG:** * **Adult Males:** <13 g/dL * **Pregnant Females:** <11 g/dL * **Children (6 months to 5 years):** <11 g/dL * **Children (5 to 11 years):** <11.5 g/dL * **Children (12 to 14 years):** <12 g/dL * **Anemia Mukt Bharat (AMB) Strategy:** Uses a "6x6x6" strategy to combat anemia in India, targeting six age groups with six interventions and six institutional mechanisms.

Q: What is the percent of total energy supplied by fish protein (PE % Kcal)?

80%. ***80%*** - Fish is a **high-quality protein source** with minimal carbohydrates and fats, making protein contribute approximately **80% of total calories**. - This high **PE% Kcal** makes fish an excellent source for meeting **protein requirements** with relatively few calories. *20%* - This percentage is too low for fish protein and more representative of **mixed diets** or **carbohydrate-rich foods**. - Fish has much higher protein density compared to foods that would yield only **20% protein energy**. *40%* - This value is closer to **mixed protein sources** like eggs (~35%) but significantly underestimates fish protein contribution. - Fish has **minimal non-protein calories** from carbohydrates, making this percentage inadequate. *60%* - While higher than many foods, this still underestimates the **protein energy percentage** of fish. - Fish has very low **carbohydrate content** and moderate fat, allowing protein to dominate the caloric contribution more than 60%.

Q: Which of the following is not present in pulses?

Cysteine. **Explanation:** The correct answer is **Cysteine** (Option B). Pulses (legumes) are a vital source of dietary protein, especially in vegetarian populations. However, they are characterized by a specific amino acid profile that makes them an "incomplete" protein source. 1. **Why Cysteine is the correct answer:** Pulses are notoriously deficient in **sulfur-containing amino acids**, specifically **Methionine and Cysteine**. In the context of NEET-PG, Methionine is the most frequently cited deficiency, but Cysteine is also lacking. 2. **Why other options are incorrect:** * **Lysine:** Pulses are **rich in Lysine**. This is clinically significant because cereals (wheat, rice) are deficient in Lysine but rich in Methionine. * **Arginine:** This is a non-essential/semi-essential amino acid that is present in pulses. * **Protein:** Pulses are a major source of plant-based protein, typically containing **20-25% protein** by weight (Soybean being the highest at ~40%). **High-Yield NEET-PG Pearls:** * **Mutual Supplementation (Pulse-Cereal Mix):** To achieve a "complete" protein profile (Biological Value), pulses and cereals should be consumed together in a **1:4 ratio**. The Lysine from pulses compensates for the deficiency in cereals, while the Methionine from cereals compensates for the deficiency in pulses. * **Limiting Amino Acid:** The amino acid in shortest supply in a food is called the "limiting amino acid." For pulses, it is **Methionine**; for cereals, it is **Lysine**; for maize, it is **Tryptophan**. * **Anti-nutritional factors:** Pulses often contain phytates and tannins which can inhibit mineral absorption.

Q: What is the recommended daily iodine intake for pregnant women?

250 mcg. **Explanation:** The correct answer is **250 mcg**. Iodine is a critical micronutrient required for the synthesis of thyroid hormones (T3 and T4), which are essential for fetal neurodevelopment and metabolic regulation. **Why 250 mcg is correct:** During pregnancy, iodine requirements increase significantly due to: 1. Increased maternal T4 production to maintain euthyroidism. 2. Transfer of iodine to the fetus (especially after the 12th week when the fetal thyroid begins functioning). 3. An increase in the glomerular filtration rate (GFR), leading to higher urinary iodine excretion. The **WHO (World Health Organization)** and **UNICEF** recommend a daily intake of **250 mcg** for both pregnant and lactating women to prevent Iodine Deficiency Disorders (IDD) like cretinism and cognitive impairment. **Analysis of Incorrect Options:** * **A (75 mcg):** This is insufficient for any age group and falls below the requirement for infants (90 mcg). * **B (100 mcg):** This is the approximate requirement for children (aged 0–5 years). * **C (150 mcg):** This is the standard RDA for **adolescents and non-pregnant adults**. While it is the baseline for the general population, it is inadequate for the increased physiological demands of pregnancy. **High-Yield Clinical Pearls for NEET-PG:** * **Indicator of Iodine Status:** The best epidemiological indicator for iodine status in a community is **Median Urinary Iodine Excretion (MUIE)**. For pregnant women, a MUIE of **150–249 μg/L** indicates adequate intake. * **Iodized Salt:** Under the National Iodine Deficiency Disorders Control Programme (NIDDCP), salt must contain **30 ppm** of iodine at the production level and **15 ppm** at the consumer level. * **Consequence of Deficiency:** Maternal iodine deficiency is the most common cause of **preventable mental retardation** worldwide.

Q: Which vitamin deficiency disease is commonly seen in populations that primarily consume maize?

Pellagra. **Explanation:** The correct answer is **Pellagra**, which is caused by a deficiency of **Niacin (Vitamin B3)**. This condition is classically associated with maize-based diets due to two primary reasons: 1. **Low Tryptophan:** Maize is deficient in Tryptophan, an essential amino acid that serves as a precursor for the endogenous synthesis of Niacin in the body. 2. **Bound Niacin (Niacytin):** The niacin present in maize is in a bound form called 'Niacytin,' which is biologically unavailable for absorption in the human gut. **Analysis of Incorrect Options:** * **Beriberi (Vitamin B1/Thiamine deficiency):** This is typically associated with populations consuming **polished rice**, where the thiamine-rich outer bran layer is removed. * **Megaloblastic Anemia:** This results from a deficiency of **Vitamin B12 or Folic acid**, often seen in strict vegetarians or those with malabsorption syndromes, but not specifically linked to maize. * **Night Blindness (Vitamin A deficiency):** This is the earliest symptom of Xerophthalmia, usually caused by inadequate intake of green leafy vegetables, yellow fruits, or animal products. **High-Yield Clinical Pearls for NEET-PG:** * **The 4 D’s of Pellagra:** Dermatitis (Casal’s necklace distribution), Diarrhea, Dementia, and Death. * **Amino Acid Link:** 60 mg of Tryptophan yields 1 mg of Niacin. * **Jowar Connection:** Pellagra is also seen in populations consuming **Jowar (Sorghum)** because it contains high levels of **Leucine**, which interferes with the conversion of Tryptophan to Niacin. * **Nixtamalization:** Traditional alkaline treatment of maize (using lime) releases bound niacin, preventing pellagra in certain cultures.

Q: Which test is used to assess milk pasteurization?

Nitric acid test. ### Explanation **Correct Option: B. Phosphatase Test** *(Note: There appears to be a clerical error in the provided key. In medical literature and standard textbooks like Park’s Preventive and Social Medicine, the **Phosphatase Test** is the gold standard for assessing milk pasteurization.)* **Why Phosphatase Test is the Correct Answer:** The Phosphatase test is based on the presence of the enzyme **alkaline phosphatase**, which is naturally present in raw milk. This enzyme is slightly more heat-resistant than the most heat-tolerant non-spore-forming pathogen found in milk (*Coxiella burnetii*). Therefore, if the phosphatase enzyme is destroyed (inactivated), it serves as a biochemical marker that the pasteurization process was successful and all common pathogens have been killed. **Analysis of Other Options:** * **A. Orthotolidine Test:** This test is used to detect **Free and Combined Chlorine** in drinking water. It is not used for milk. * **C. Nitric Acid Test:** This is typically used to detect **adulteration** of oils (like Argemone oil in Mustard oil) or as a general chemical reagent; it has no role in verifying pasteurization. * **D. Acid Chromatin Test:** This is not a standard diagnostic test in community medicine or food hygiene. **High-Yield Clinical Pearls for NEET-PG:** * **Standard Pasteurization Methods:** * *Holder Method:* 63–66°C for 30 minutes. * *HTST (High Temperature Short Time):* 72°C for 15 seconds. * **Methylene Blue Reduction Test:** Used to assess the **bacteriological quality** (cleanliness) of milk, not the efficiency of pasteurization. * **Coliform Count:** Used to detect post-pasteurization contamination. * **Coxiella burnetii:** The most heat-resistant pathogen in milk; its destruction is the benchmark for successful pasteurization.

Question 1

Height in centimeters divided by the cube root of body weight is also known as which index?

Accepted Answer

Ponderal index

Answer

Quetelet index

Answer

Broca index

Answer

Corpulence index

Question 2

Which of the following are suggestions to improve the nutritional value of the Mid-day meal program?

Accepted Answer

Sprouted pulses should be added as they have more nutrients.

Answer

The cereals to pulse ratio should be 1:3.

Answer

Rice water left after cooking should be mixed with dal.

Answer

Food grains should be stored away from moist areas.

Question 3

Which food source has the highest biological value?

Accepted Answer

Egg

Answer

Milk

Answer

Soyabean

Answer

Pulses

Question 4

Which of the following processes prevents lathyrism from Khesari dal?

Accepted Answer

Parboiling

Answer

Filtration

Answer

Sunlight exposure

Answer

Soaking

Question 5

According to WHO, what is the cut-off for the diagnosis of anemia in non-pregnant females?

Accepted Answer

12 g%

Answer

7 g%

Answer

10 g%

Answer

11 g%

Question 6

What is the percent of total energy supplied by fish protein (PE % Kcal)?

Accepted Answer

80%

Answer

20%

Answer

40%

Answer

60%

Question 7

Which of the following is not present in pulses?

Accepted Answer

Cysteine

Answer

Lysine

Answer

Arginine

Answer

Protein

Question 8

What is the recommended daily iodine intake for pregnant women?

Accepted Answer

250 mcg

Answer

75 mcg

Answer

100 mcg

Answer

150 mcg

Question 9

Which vitamin deficiency disease is commonly seen in populations that primarily consume maize?

Accepted Answer

Pellagra

Answer

Beriberi

Answer

Megaloblastic anemia

Answer

Night blindness

Question 10

Which test is used to assess milk pasteurization?

Accepted Answer

Nitric acid test

Answer

Ohotolidine test

Answer

Phosphatase test

Answer

Acid chromatin test

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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