Nutrition and Health Practice Questions

Q: Which amino acid is the limiting amino acid in wheat?

Lysine. **Explanation** The concept of a **limiting amino acid** refers to the essential amino acid present in the lowest quantity relative to the body's requirements in a specific food source. It "limits" the synthesis of proteins because once it is exhausted, the body cannot utilize the remaining amino acids for protein production. **Why Lysine is correct:** Cereals, including **wheat**, rice, and maize, are characteristically deficient in the essential amino acid **Lysine**. While wheat is a primary source of energy and protein in many diets, its biological value is limited by this deficiency. To achieve a "complete protein" profile, wheat must be consumed with pulses (legumes), which are rich in Lysine. **Analysis of Incorrect Options:** * **A. Methionine:** This is the limiting amino acid in **pulses** (legumes) and soybeans. Pulses are rich in Lysine but lack sulfur-containing amino acids like Methionine. * **B. Tryptophan:** This is the limiting amino acid in **Maize** (along with Lysine). A deficiency of Tryptophan in a maize-dependent diet can lead to Pellagra, as Tryptophan is a precursor for Niacin (Vitamin B3). * **D. Isoleucine:** While present in varying amounts in grains, it is rarely the primary "limiting" factor in major staple cereals compared to Lysine or Methionine. **High-Yield NEET-PG Pearls:** * **Mutual Supplementation:** The practice of mixing cereals (deficient in Lysine) with pulses (deficient in Methionine) is called the "supplementary action of proteins." This ensures a balanced intake of all essential amino acids. * **Pulse-Cereal Ratio:** For optimum protein utilization, the recommended ratio of cereal protein to pulse protein is **4:1**. * **Reference Protein:** Egg protein is considered the "standard" or reference protein (Biological Value = 100) because it contains all essential amino acids in the correct proportions.

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

500 mcg. **Explanation:** The daily requirement of folate increases significantly during pregnancy to support rapid cell division, fetal growth, and the expansion of maternal red cell mass. **1. Why 500 mcg is correct:** According to the **World Health Organization (WHO)** and the **Ministry of Health and Family Welfare (MoHFW, India)** under the Anemia Mukt Bharat guidelines, the recommended daily intake of folic acid for a pregnant woman is **500 mcg (0.5 mg)**. This dosage is sufficient to prevent maternal megaloblastic anemia and significantly reduce the risk of Neural Tube Defects (NTDs) in the fetus. **2. Analysis of incorrect options:** * **200 mcg (Option A):** This is roughly the recommended dietary allowance (RDA) for a non-pregnant adult female. It is insufficient to meet the physiological demands of pregnancy. * **300 mcg (Option B):** This value is often cited as the requirement for lactating mothers, but it falls short of the pregnancy requirement. * **700 mcg (Option D):** This exceeds the standard recommended dose for a routine pregnancy without specific risk factors. **3. High-Yield Clinical Pearls for NEET-PG:** * **Pre-conception:** Ideally, folic acid (400 mcg) should be started **4 weeks before conception** and continued through the first trimester. * **High-Risk Cases:** For women with a **previous history of a child with NTD**, the dose is increased tenfold to **4 mg (4000 mcg)** daily. * **IFA Tablets:** Under the government's Iron Plus Initiative, the prophylactic dose is **100 mg elemental Iron + 500 mcg Folic Acid** daily for 180 days starting from the second trimester (14 weeks). * **Role:** Folic acid is a co-enzyme for DNA synthesis; deficiency leads to megaloblastic anemia and NTDs (e.g., Anencephaly, Spina Bifida).

Q: What is the recommended daily requirement of iodine for lactating women?

200-300 µg. **Explanation:** The correct answer is **C (200-300 µg)**. Iodine is an essential trace element required for the synthesis of thyroid hormones (T3 and T4), which regulate metabolic rate and neurodevelopment. During lactation, the maternal iodine requirement increases significantly because the mother must provide enough iodine to meet her own metabolic needs while also secreting sufficient amounts into breast milk to support the infant’s rapid brain development and thyroid function. * **WHO/UNICEF Guidelines:** Recommend **250 µg/day** for pregnant and lactating women. * **ICMR (Indian Council of Medical Research):** Recommends **280 µg/day** for lactating mothers. Both fall within the 200-300 µg range. **Analysis of Incorrect Options:** * **A (50-100 µg):** This is insufficient for any adult. It is closer to the requirement for infants (approx. 90 µg). * **B (100-200 µg):** This range covers the RDA for normal adults (150 µg), but is inadequate for the increased physiological demands of lactation. * **D (25-50 µg):** This is severely deficient and would lead to goiter and hypothyroidism. **High-Yield Clinical Pearls for NEET-PG:** * **Iodine Deficiency Disorders (IDD):** The most common cause of preventable mental retardation worldwide. * **Wolff-Chaikoff Effect:** Transient inhibition of thyroid hormone synthesis due to an acute excess load of iodine. * **Indicator of Iodine Status:** Urinary Iodine Excretion (UIE) is the standard epidemiological tool for assessing iodine status in a population. * **Salt Iodization:** In India, salt is fortified with Potassium Iodate (30 ppm at production, 15 ppm at consumer level).

Q: What is the normal range for body mass index (BMI)?

18.5 to 24.99. **Explanation:** Body Mass Index (BMI), also known as Quetelet’s Index, is a simple anthropometric measure used to classify nutritional status in adults. It is calculated as weight in kilograms divided by the square of height in meters ($kg/m^2$). **Why Option A is Correct:** According to the World Health Organization (WHO) classification, a BMI range of **18.5 to 24.99 $kg/m^2$** is defined as **Normal (Healthy weight)**. This range is associated with the lowest risk of developing chronic non-communicable diseases like Type 2 Diabetes and Cardiovascular diseases. **Analysis of Incorrect Options:** * **Option B (15 to 18):** This falls under the category of **Underweight**. Specifically, a BMI <16 is severe thinness, 16–16.99 is moderate thinness, and 17–18.49 is mild thinness. * **Option C (25.00 to 29.99):** This range is classified as **Pre-obese (Overweight)**. Individuals in this category have an increased risk of metabolic complications. * **Option D (Greater than 30):** This defines **Obesity**. It is further subdivided into Class I (30–34.99), Class II (35–39.99), and Class III (≥40). **High-Yield Clinical Pearls for NEET-PG:** 1. **Asian-Indian Specific Guidelines:** Due to a higher risk of abdominal obesity and metabolic syndrome at lower BMIs, the criteria for Indians are revised: * Normal: 18.5–22.9 $kg/m^2$ * Overweight: 23–24.9 $kg/m^2$ * Obese: ≥25 $kg/m^2$ 2. **Ponderal Index:** Another measure of leaness ($Weight/Height^3$). 3. **Broca’s Index:** A quick bedside formula for Ideal Weight: $Height (cm) - 100$.

Q: The poverty line is defined as a daily energy expenditure of at least _______ kcal per person in rural areas.

2400 kcal. In India, the poverty line has historically been linked to nutritional requirements, specifically the **minimum daily calorie intake** necessary for survival and physical work. This concept was formalized by the **Alagh Committee (1979)** and later adopted by the Lakdawala Committee. ### Why 2400 kcal is correct: The definition of the poverty line is based on the average calorie requirement per capita per day. In **rural areas**, the requirement is set at **2400 kcal** because the rural population is predominantly engaged in heavy manual labor (agriculture and allied activities), which demands higher energy expenditure. ### Analysis of Incorrect Options: * **A. 2100 kcal:** This is the defined poverty line for **urban areas**. Urban residents are assumed to lead more sedentary lifestyles or engage in less physically demanding labor compared to their rural counterparts. * **B. 2200 kcal & C. 2300 kcal:** These figures do not correspond to the official poverty line benchmarks established by the Planning Commission of India. While 2200 kcal is often cited as a general average for a "Reference Man" in some contexts, it is not the legislative cutoff for the rural poverty line. ### High-Yield NEET-PG Pearls: * **Reference Man (ICMR 2020):** Weighs 65 kg, aged 19–39 years, engaged in 8 hours of moderate activity. * **Reference Woman (ICMR 2020):** Weighs 55 kg, aged 19–39 years. * **Net Protein Utilization (NPU):** For an average Indian diet, the NPU is approximately **50–60**. * **Balanced Diet Proportions:** Carbohydrates (50-60%), Fats (20-30%), and Proteins (10-15%). * **Thiamine (B1) Deficiency:** Often seen in populations where the diet is based on polished rice, leading to Beriberi.

Q: Which of the following statements about nutritional surveillance is not true?

Done in all children less than 5 years. ### Explanation **Nutritional Surveillance** is a continuous process of monitoring the nutritional status of a population to provide data for policy-making and program evaluation. #### Why Option D is the Correct Answer (The False Statement) Nutritional surveillance is **not** done for all children under 5 years of age. Instead, it is a **selective process** focused on "at-risk" groups or specific geographical areas where malnutrition is prevalent. Universal screening of all children is a feature of **Growth Monitoring** (e.g., under the ICDS program), not surveillance. Surveillance aims to identify trends in a population rather than individual clinical management. #### Analysis of Other Options * **A. It is a diagnostic approach:** This is true. It is used to "diagnose" the nutritional problems of a community, identifying the causes and extent of malnutrition to trigger organized interventions. * **B. Assessment involves precise measurements:** This is true. To ensure data reliability for policy decisions, standardized and precise anthropometric measurements (Weight-for-age, Height-for-age, etc.) are essential. * **C. Assessment is done by trained persons:** This is true. Unlike routine growth monitoring which may be done by Anganwadi workers, surveillance often requires specialized teams or trained personnel to ensure data accuracy and proper interpretation. #### NEET-PG High-Yield Pearls * **Surveillance vs. Monitoring:** Surveillance is a continuous, long-term process for policy; Monitoring is an intermittent check on the progress of a specific program. * **Objectives of Surveillance:** 1. To aid in policy-making and planning. 2. To provide an early warning system for nutritional disasters (e.g., famine). 3. To evaluate the effectiveness of existing nutritional programs. * **Key Indicators:** Often includes anthropometry, clinical signs of deficiency, and socioeconomic indicators (food prices, crop yields).

Q: What is the daily recommended dietary allowance for iodine during pregnancy?

220 mcg. **Explanation:** The correct answer is **220 mcg**. During pregnancy, the maternal requirement for iodine increases significantly due to three primary physiological changes: an increase in maternal thyroid hormone production (to maintain euthyroidism), the transfer of iodine to the fetus for fetal thyroid hormone synthesis (starting around 12 weeks), and an increase in renal iodine clearance. **Analysis of Options:** * **A. 75 mcg:** This is insufficient for any adult group and does not meet the minimum physiological requirement. * **B. 150 mcg:** This is the standard RDA for **non-pregnant adults** (men and non-lactating women). * **C. 220 mcg (Correct):** According to the WHO and the Institute of Medicine (IOM), this is the specific RDA for **pregnant women** to prevent maternal and fetal iodine deficiency. * **D. 500 mcg:** This exceeds the RDA and approaches the tolerable upper intake level. Excessive iodine can paradoxically cause fetal goiter and hypothyroidism (Wolff-Chaikoff effect). **NEET-PG High-Yield Pearls:** * **Lactation RDA:** The iodine requirement increases further during lactation to **290 mcg/day** to ensure adequate iodine content in breast milk. * **Fetal Impact:** Severe iodine deficiency is the most common preventable cause of **congenital hypothyroidism** and **Cretinism** (characterized by intellectual disability, deaf-mutism, and spastic diplegia). * **Neurological Development:** The most critical period for iodine-dependent brain development is the first and second trimesters. * **Goitrogens:** Substances like cabbage, cauliflower, and cassava can interfere with iodine uptake and should be monitored in iodine-deficient regions.

Q: What is the recommended daily allowance (RDA) of zinc for a child?

6-8 mg. **Explanation:** Zinc is an essential trace element required for protein synthesis, DNA maturation, cell division, and immune function. According to the **ICMR-NIN (Indian Council of Medical Research)** and standard pediatric guidelines, the Recommended Daily Allowance (RDA) for zinc varies by age but generally falls within the **6–8 mg/day** range for children (specifically those aged 4–12 years). * **Why Option C is correct:** For children aged 4–6 years, the RDA is approximately 7 mg/day, and for 7–9 years, it is 8 mg/day. Thus, 6–8 mg represents the most accurate clinical range for the pediatric population in standard exam questions. * **Why Option A & B are incorrect:** 10–20 mg/day exceeds the maintenance RDA for children. However, **20 mg** is the therapeutic dose used for 14 days during the management of **acute diarrhea** in children >6 months of age (10 mg for infants <6 months). * **Why Option D is incorrect:** 4–5 mg/day is the RDA for infants (6–12 months), which is lower than the requirement for older children. **High-Yield Clinical Pearls for NEET-PG:** * **Diarrhea Management:** Zinc supplementation reduces the duration and severity of diarrhea and prevents future episodes for 2–3 months. * **Acrodermatitis Enteropathica:** A rare genetic disorder of zinc absorption characterized by the triad of **alopecia, diarrhea, and vesiculobullous dermatitis** (periorificial and acral). * **Deficiency Signs:** Growth retardation (dwarfism), delayed puberty, hypogeusia (impaired taste), and poor wound healing. * **Best Sources:** Oysters, red meat, and legumes. Phytates in cereals can inhibit zinc absorption.

Q: What is the recommended initial dose of Vitamin A for prophylaxis in a 9-month-old child?

100,000 IU. ### Explanation The correct answer is **100,000 IU**. **Underlying Medical Concept:** In India, the **National Prophylaxis Programme against Nutritional Blindness** (under the Reproductive and Child Health program) follows a specific age-based schedule for Vitamin A supplementation to prevent xerophthalmia. * **The first dose** is administered at **9 months** of age (usually along with the Measles/MR vaccine). At this age, the infant's body weight and liver storage capacity are lower, necessitating a smaller dose of **100,000 IU (1 ml)** to ensure safety and prevent toxicity. * **Subsequent doses** (2nd to 9th dose) are administered every 6 months until the age of 5 years, at a dosage of **200,000 IU (2 ml)**. **Analysis of Incorrect Options:** * **Option B & D (200,000 IU):** This is the standard dose for children **aged 1–5 years**. Giving this dose at 9 months increases the risk of hypervitaminosis A (e.g., bulging fontanelle, vomiting). * **Option A & B (400,000 IU / 500,000 IU):** These dosages are significantly higher than any single prophylactic dose recommended in public health guidelines and could be toxic. **High-Yield NEET-PG Pearls:** 1. **Total Doses:** A child receives a total of **9 doses** of Vitamin A by age 5. 2. **Total Cumulative Dose:** The total amount administered over 5 years is **17,00,000 IU** (1 lakh + 8 doses of 2 lakhs). 3. **Treatment vs. Prophylaxis:** For **treating** active Xerophthalmia, the dose is 200,000 IU (or 100,000 IU if <1 year) given on days 0, 1, and 14. 4. **Post-partum:** A single dose of 200,000 IU can be given to the mother within 8 weeks of delivery to increase Vitamin A content in breast milk (if not already supplemented).

Question 1

Which amino acid is the limiting amino acid in wheat?

Accepted Answer

Lysine

Answer

Methionine

Answer

Tryptophan

Answer

Isoleucine

Question 2

What is the daily requirement of folate during pregnancy?

Accepted Answer

500 mcg

Answer

200 mcg

Answer

300 mcg

Answer

700 mcg

Question 3

What is the recommended daily requirement of iodine for lactating women?

Accepted Answer

200-300 µg

Answer

50-100 µg

Answer

100-200 µg

Answer

25-50 µg

Question 4

What is the normal range for body mass index (BMI)?

Accepted Answer

18.5 to 24.99

Answer

15 to 18

Answer

25.00 to 29.99

Answer

Greater than 30

Question 5

Which of the following is NOT an example of food fortification?

Accepted Answer

Addition of color to saccharin

Answer

Addition of Vitamin A to foodstuffs

Answer

Addition of extra nutrients to foodstuffs

Answer

Iodization of salt

Question 6

The poverty line is defined as a daily energy expenditure of at least _______ kcal per person in rural areas.

Accepted Answer

2400 kcal

Answer

2100 kcal

Answer

2200 kcal

Answer

2300 kcal

Question 7

Which of the following statements about nutritional surveillance is not true?

Accepted Answer

Done in all children less than 5 years

Answer

It is a diagnostic approach

Answer

Assessment involves precise measurements of weight and height

Answer

Assessment is done by trained persons

Question 8

What is the daily recommended dietary allowance for iodine during pregnancy?

Accepted Answer

220 mcg

Answer

75 mcg

Answer

150 mcg

Answer

500 mcg

Question 9

What is the recommended daily allowance (RDA) of zinc for a child?

Accepted Answer

6-8 mg

Answer

10 mg

Answer

20 mg

Answer

4-5 mg

Question 10

What is the recommended initial dose of Vitamin A for prophylaxis in a 9-month-old child?

Accepted Answer

100,000 IU

Answer

400,000 IU

Answer

500,000 IU

Answer

200,000 IU

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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