Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 131: A district health officer visited local general stores and found that turmeric was adulterated with lead chromate powder and coriander with cow dung. Based on these findings, what can be concluded about the food in this district?

A. Adulterated (Correct Answer)
B. Fortified
C. Intoxicated
D. Infected

Explanation: ### Explanation **1. Why the Correct Answer is Right:** The scenario describes **Food Adulteration**, which is defined as the intentional addition or substitution of inferior, cheaper, or harmful substances to food items, or the removal of vital nutrients, to increase profits or improve appearance. * **Lead Chromate** is a common adulterant used in turmeric to give it a bright yellow color; however, it is highly toxic and can lead to lead poisoning and anemia. * **Cow Dung/Horse Dung** is often added to powdered spices like coriander to increase bulk. According to the **Prevention of Food Adulteration (PFA) Act** (now subsumed under FSSAI), these actions constitute adulteration because they degrade the quality and safety of the food. **2. Why Other Options are Incorrect:** * **B. Fortified:** Food fortification is the *deliberate* addition of essential micronutrients (e.g., Iodine in salt, Vitamin A in milk) to improve nutritional quality for public health benefits. It is a positive intervention, not a harmful one. * **C. Intoxicated:** Food intoxication refers to illness caused by ingesting toxins produced by bacteria (e.g., *Staphylococcal* enterotoxin or Botulinum toxin) or naturally occurring toxins (e.g., Lathyrism). It is a biological/chemical consequence, not the act of mixing substances. * **D. Infected:** Food infection occurs when live pathogenic microorganisms (e.g., *Salmonella*) are ingested and multiply in the body. **3. NEET-PG High-Yield Pearls:** * **Common Adulterants:** * Argemone oil in Mustard oil $\rightarrow$ Causes **Epidemic Dropsy**. * Khesari Dal in Arhar Dal $\rightarrow$ Causes **Lathyrism** (due to BOAA toxin). * Metanil Yellow in sweets/turmeric $\rightarrow$ Carcinogenic. * **Test for Lead Chromate:** Adding 5ml of 1:1 HCl to a turmeric solution; a magenta color that persists indicates the presence of lead chromate. * **Regulatory Body:** The **FSSAI (Food Safety and Standards Authority of India)**, established under the Act of 2006, is the current governing body for food standards in India.

Question 132: What is the prophylactic dose of vitamin A given to children aged 1-6 years?

A. 2,000 IU
B. 20,000 IU
C. 200,000 IU (Correct Answer)
D. 100,000 IU

Explanation: ### Explanation The correct answer is **200,000 IU**. This dose is part of the **National Vitamin A Prophylaxis Programme**, which aims to prevent nutritional blindness due to Vitamin A Deficiency (VAD). **1. Why 200,000 IU is correct:** Vitamin A is a fat-soluble vitamin stored in the liver. In children aged **1 to 6 years**, the liver capacity is sufficient to store a large bolus dose that can be utilized over several months. Under the current guidelines, children in this age group receive **200,000 IU orally every 6 months** until their 5th birthday (totaling 9 doses starting from infancy). **2. Why the other options are incorrect:** * **100,000 IU (Option D):** This is the specific dose for infants aged **6 to 11 months**. Because infants have smaller liver storage capacity and a lower body weight, a half-dose is administered to prevent toxicity while ensuring adequate protection. * **2,000 IU (Option A):** This is closer to the Recommended Dietary Allowance (RDA) for daily intake, not a periodic prophylactic bolus. * **20,000 IU (Option B):** This dose does not correspond to any standard prophylactic or therapeutic protocol in the national program. **3. High-Yield Clinical Pearls for NEET-PG:** * **Schedule:** The 1st dose (1 lakh IU) is given at **9 months** with the Measles/MR vaccine. Subsequent doses (2 lakh IU) are given every 6 months up to **5 years** of age. * **Total Dosage:** A child receives a total of **17,00,000 IU** (17 lakh IU) across 9 doses by age five. * **Treatment of Xerophthalmia:** If a child has clinical signs (e.g., Bitot's spots), the schedule is: One dose on **Day 0**, one dose on **Day 1**, and one dose on **Day 28**. * **Oil-based:** Vitamin A is administered using a 2ml spoon (where 1ml = 1 lakh IU).

Question 133: What is true about lathyrism?

A. Caused by Aspergillus flavus
B. Prevented by parboiling (Correct Answer)
C. Sanguinarine is the toxic principle
D. All of the above

Explanation: **Explanation:** Lathyrism is a form of permanent spastic paraplegia caused by the excessive consumption of **Khesari Dal (*Lathyrus sativus*)**. It is primarily seen in central India among socio-economically disadvantaged populations who use this pulse as a staple during droughts. **Why Option B is Correct:** The toxic principle in *Lathyrus sativus* is **BOAA** (Beta-oxalyl-amino-alanine), which is water-soluble. **Parboiling** (steeping the pulse in hot water and then drying it) effectively leaches out the toxin, reducing its concentration to safe levels. Another method for toxin removal is sun-drying followed by roasting. **Why Other Options are Incorrect:** * **Option A:** *Aspergillus flavus* is a fungus that produces **Aflatoxins**, which are associated with groundnuts and maize, leading to acute hepatitis and hepatocellular carcinoma, not lathyrism. * **Option C:** **Sanguinarine** is the toxic alkaloid found in Argemone oil (Mexican poppy). Its consumption leads to **Epidemic Dropsy**, characterized by bilateral edema, cardiac failure, and glaucoma. **NEET-PG High-Yield Pearls:** 1. **Toxic Principle:** BOAA (also known as ODAP). It acts as a neurotoxin by mimicking glutamate. 2. **Clinical Stages:** Lathyrism progresses through four stages: **Latent** (positive stick sign), **No-stick** (clumsy gait), **One-stick**, and **Two-stick** (permanent disability). 3. **Prevention:** The most effective long-term strategy is the replacement of *Lathyrus sativus* with safer crops like Bengal gram or the use of low-BOAA varieties. 4. **Target Population:** Typically affects young adult males (15–45 years) due to higher consumption levels.

Question 134: What is the recommended daily protein intake for an adult male?

A. 0.5 gm/kg/day
B. 1 gm/kg/day (Correct Answer)
C. 1.5 gm/kg/day
D. 2 gm/kg/day

Explanation: The recommended dietary allowance (RDA) for protein in a healthy adult is based on the physiological need to maintain nitrogen balance and repair body tissues. **Explanation of the Correct Answer:** The correct answer is **1 gm/kg/day** (Option B). According to the Indian Council of Medical Research (ICMR) and the National Institute of Nutrition (NIN), the standard recommendation for an average Indian adult (sedentary to moderate activity) is approximately 0.8 to 1.0 gm per kg of ideal body weight per day. This ensures that the body receives sufficient essential amino acids for metabolic functions and muscle maintenance. **Analysis of Incorrect Options:** * **0.5 gm/kg/day (Option A):** This is below the physiological requirement. Intake at this level leads to a negative nitrogen balance, eventually causing muscle wasting and impaired immunity. * **1.5 gm/kg/day (Option C):** While safe, this is higher than the RDA for a sedentary adult. Such levels are typically reserved for individuals with increased physiological demands, such as pregnant women, lactating mothers, or those recovering from major surgery/burns. * **2 gm/kg/day (Option D):** This is a high-protein diet usually recommended only for elite athletes, bodybuilders, or patients with severe catabolic states (e.g., extensive burns or multiple trauma). **High-Yield Clinical Pearls for NEET-PG:** * **Reference Protein:** Egg protein is considered the "Reference Protein" (Biological Value = 100) because it contains all essential amino acids in the right proportions. * **Net Protein Utilization (NPU):** For Indian diets, the NPU is generally lower (around 65%) compared to animal proteins, which is why a slightly higher intake is often encouraged. * **Specific Dynamic Action (SDA):** Protein has the highest SDA (approx. 30%), meaning it requires more energy for digestion compared to fats and carbohydrates. * **Kwashiorkor vs. Marasmus:** Remember that Kwashiorkor is primarily a protein deficiency (with adequate calories), while Marasmus is a deficiency of both proteins and total calories.

Question 135: Which of the following is a semiessential amino acid?

A. Alanine
B. Valine
C. Histidine (Correct Answer)
D. Tyrosine

Explanation: **Explanation:** The classification of amino acids is a high-yield topic in NEET-PG, based on whether the body can synthesize them or requires them through diet. **Why Histidine is Correct:** Amino acids are categorized into essential, non-essential, and **semi-essential**. Semi-essential amino acids (Histidine and Arginine) are those that can be synthesized by the body, but the rate of synthesis is insufficient to meet the demands during periods of rapid growth, such as infancy, childhood, or pregnancy. Therefore, they must be supplemented through the diet during these specific physiological states. While Arginine is often debated, **Histidine** is universally recognized as semi-essential (or conditionally essential) in medical literature. **Analysis of Incorrect Options:** * **A. Alanine:** This is a **non-essential** amino acid. The body can synthesize it from pyruvate via transamination; hence, dietary intake is not mandatory. * **B. Valine:** This is a strictly **essential** amino acid. It belongs to the "PVT TIM HALL" mnemonic group and cannot be synthesized by the body at all. * **D. Tyrosine:** This is a **non-essential** (specifically, conditionally essential) amino acid synthesized from Phenylalanine. It is only required in the diet if the precursor Phenylalanine is deficient (as seen in PKU). **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic for Essential Amino Acids:** **PVT TIM HALL** (Phenylalanine, Valine, Threonine, Tryptophan, Isoleucine, Methionine, Histidine, Arginine, Leucine, Lysine). * **Purely Ketogenic Amino Acids:** Leucine and Lysine. * **Limiting Amino Acids:** Pulse protein is usually deficient in Methionine, while Cereal protein is deficient in Lysine. * **Histidine Fact:** It is the precursor for Histamine and acts as a vital buffer in hemoglobin.

Question 136: Pasteurized milk is tested by which of the following methods?

A. Phosphatase test (Correct Answer)
B. OTA test
C. Nitrate test
D. Nitroprusside test

Explanation: **Explanation:** **Phosphatase Test (Correct Answer):** The Phosphatase test is the standard method used to check the efficiency of pasteurization. It is based on the principle that the enzyme **Alkaline Phosphatase (ALP)** is naturally present in raw milk and has a heat resistance slightly greater than that of common milk-borne pathogens (like *Mycobacterium tuberculosis* and *Coxiella burnetii*). If pasteurization is successful, the enzyme is completely inactivated. A positive test (presence of the enzyme) indicates either inadequate heating or post-pasteurization contamination with raw milk. **Analysis of Incorrect Options:** * **OTA (Orthotolidine Arsenite) Test:** This is used to determine **Residual Chlorine** (both free and combined) in drinking water. It is a crucial test in environmental sanitation, not milk processing. * **Nitrate Test:** This is typically used to detect the presence of nitrates in water or as a biochemical test in microbiology (Nitrate Reduction Test) to differentiate bacteria. * **Nitroprusside Test:** Also known as Rothera’s test, it is used to detect **Ketone bodies** (acetone and acetoacetic acid) in urine, commonly used in the diagnosis of Diabetic Ketoacidosis. **High-Yield Clinical Pearls for NEET-PG:** * **Standard Pasteurization Methods:** 1. **Holder Method:** 63–66°C for 30 minutes. 2. **HTST (High-Temperature Short-Time):** 72°C for 15 seconds (followed by rapid cooling to 4°C). * **Standard for Milk Quality:** The **Methylene Blue Reduction Test** is used to check the bacterial quality (cleanliness) of raw milk before processing. * **Phosphatase vs. Peroxidase:** While Phosphatase is destroyed by pasteurization, the enzyme Peroxidase is only destroyed at much higher temperatures (Boiling).

Question 137: Hypothyroidism is associated with deficiency of which of the following micronutrients?

A. Iron
B. Iodine (Correct Answer)
C. Zinc
D. Fluorine

Explanation: **Explanation:** **1. Why Iodine is Correct:** Iodine is an essential micronutrient required for the synthesis of thyroid hormones (T3 and T4). The thyroid gland traps circulating iodide and, through the process of organification, incorporates it into thyroglobulin. A deficiency in iodine leads to inadequate hormone production, triggering an increase in Thyroid Stimulating Hormone (TSH). This results in thyroid hypertrophy (Goiter) and **hypothyroidism**. Iodine deficiency is the most common cause of preventable intellectual disability and hypothyroidism worldwide. **2. Why Other Options are Incorrect:** * **Iron (A):** While iron deficiency is the leading cause of anemia globally, it is not the primary cause of hypothyroidism. However, iron is a cofactor for *thyroid peroxidase*; thus, iron deficiency can sometimes worsen pre-existing iodine deficiency. * **Zinc (C):** Zinc is involved in the synthesis and metabolism of thyroid hormones, but its deficiency typically manifests as growth retardation, immune dysfunction, and skin lesions (acrodermatitis enteropathica) rather than clinical hypothyroidism. * **Fluorine (D):** Fluorine is related to dental health (preventing caries). Excess fluorine (Fluorosis) is actually considered a "goitrogen" in some studies as it may interfere with iodine uptake, but its *deficiency* does not cause hypothyroidism. **3. NEET-PG High-Yield Pearls:** * **Daily Requirement:** 150 mcg/day for adults; 250 mcg/day for pregnant/lactating women. * **Iodine Deficiency Disorders (IDD):** Includes abortion, stillbirth, cretinism, and goiter. * **Indicator of Choice:** **Urinary Iodine Excretion (UIE)** is the best epidemiological indicator for current iodine status (Median UIE <100 µg/L indicates deficiency in a population). * **Public Health Strategy:** The National Iodine Deficiency Disorders Control Programme (NIDDCP) mandates the fortification of salt with Potassium Iodate (30 ppm at production; 15 ppm at consumer level).

Question 138: If ASHA finds any child lies in the yellow area according to the ICDS growth chart, what action should be taken?

A. Child is referred to a higher center
B. Child is referred to the Primary Health Centre (PHC) (Correct Answer)
C. Community-based management of malnutrition
D. Only follow-up

Explanation: ### Explanation The ICDS (Integrated Child Development Services) growth chart, based on WHO Growth Standards, uses a color-coded system to monitor a child's nutritional status based on **Weight-for-Age**. **1. Why Option B is Correct:** The growth chart is divided into three zones: * **Green Zone:** Normal nutritional status (Above -2SD). * **Yellow Zone:** Moderately underweight (Between -2SD and -3SD). * **Orange Zone:** Severely underweight (Below -3SD). When an ASHA or Anganwadi Worker identifies a child in the **Yellow Zone**, it indicates **Moderate Acute Malnutrition (MAM)**. According to ICDS guidelines, these children must be referred to the **Primary Health Centre (PHC)** for a medical check-up to rule out underlying infections and to receive targeted nutritional supplementation (Double Ration). **2. Why Other Options are Incorrect:** * **Option A:** Referral to a higher center (NRC or District Hospital) is reserved for children in the **Orange Zone** (Severe Acute Malnutrition) or those with medical complications. * **Option C:** While community-based management is part of the strategy, the immediate protocol-driven action for an ASHA is a formal referral to the PHC for assessment. * **Option D:** "Only follow-up" is insufficient. While follow-up is necessary, the child requires an initial clinical evaluation and supplementary nutrition. ### High-Yield Clinical Pearls for NEET-PG: * **Growth Chart Type:** The ICDS uses the **WHO Growth Standards (2006)**. * **Reference Parameters:** The ICDS chart specifically monitors **Weight-for-Age**. * **Growth Curve Trends:** A flat curve (stagnant weight) or a falling curve is a more sensitive indicator of malnutrition than a single point in the yellow zone. * **SAM Criteria:** Weight-for-height < -3SD, Mid-Upper Arm Circumference (MUAC) < 11.5 cm, or presence of bilateral pitting edema.

Question 139: According to WHO, exclusive breastfeeding should be continued up to what age?

A. 6 months (Correct Answer)
B. 4 months
C. 8 months
D. 10 months

Explanation: **Explanation:** The World Health Organization (WHO) and UNICEF recommend **exclusive breastfeeding for the first 6 months (180 days)** of life. Exclusive breastfeeding means the infant receives only breast milk; no other liquids or solids are given, not even water, with the exception of oral rehydration solution, or drops/syrups of vitamins, minerals, or medicines. **Why 6 months is correct:** By 6 months of age, breast milk provides all the energy and nutrients that an infant needs. It offers critical protection against gastrointestinal infections and pneumonia. Beyond 6 months, breast milk alone is no longer sufficient to meet the increasing nutritional requirements (especially iron and energy), necessitating the introduction of nutritionally adequate and safe complementary foods while continuing breastfeeding. **Why other options are incorrect:** * **4 months:** Previously, some guidelines suggested 4–6 months, but research confirmed that extending exclusivity to 6 months significantly reduces morbidity from diarrheal diseases without compromising growth. * **8 and 10 months:** Delaying complementary feeding beyond 6 months puts the infant at risk for growth faltering, malnutrition, and micronutrient deficiencies (like iron-deficiency anemia). **High-Yield Clinical Pearls for NEET-PG:** * **Duration:** Breastfeeding should be continued up to **2 years of age or beyond** along with complementary feeding. * **Initiation:** Breastfeeding should be initiated within **1 hour** of birth. * **Colostrum:** The "first milk" is rich in Antibodies (IgA) and serves as the baby's first immunization. * **Energy Density:** Breast milk provides approximately **67 kcal/100 ml**. * **Contraindications:** Very few exist, primarily maternal HIV (in specific settings), active untreated TB, or infants with Galactosemia.

Question 140: Which of the following grains has the highest fat content?

A. Wheat
B. Rice
C. Maize
D. Bajra (Correct Answer)

Explanation: **Explanation:** The correct answer is **Bajra (Pearl Millet)**. In the context of nutritional profiles of cereals and millets, Bajra stands out for its high energy density, primarily due to its superior fat content compared to other common grains. **1. Why Bajra is Correct:** Bajra contains approximately **5 grams of fat per 100 grams**. This is significantly higher than the fat content found in major cereals. Beyond fat, Bajra is also a rich source of iron (8 mg/100g), making it a high-yield nutritional grain often discussed in the context of preventing nutritional anemia and providing energy-dense weaning foods. **2. Why the Other Options are Incorrect:** * **Wheat:** Contains about **1.5 to 2 grams** of fat per 100g. Its primary nutritional strength is its protein content (gluten) and B-complex vitamins. * **Rice:** Contains the least amount of fat among these options, approximately **0.5 to 1 gram** per 100g. Most of the fat is lost during the polishing process. * **Maize:** Contains about **3.6 grams** of fat per 100g. While higher than wheat and rice, it still falls short of Bajra. Maize is clinically significant for being deficient in Tryptophan and Lysine, leading to Pellagra in maize-eating populations. **3. High-Yield Facts for NEET-PG:** * **Highest Protein Content:** Wheat (~12%) and Bajra (~11.5%). * **Highest Calcium Content:** Ragi (Finger Millet) is the "Calcium King" with **344 mg/100g**. * **Limiting Amino Acid in Cereals:** Lysine (Cereals are generally rich in Methionine). * **Limiting Amino Acid in Pulses:** Methionine (Pulses are generally rich in Lysine). * **Pellagragenic Diet:** A diet based on Maize (due to low Tryptophan) or Jowar (due to high Leucine interfering with Tryptophan metabolism).

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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