Nutrition and Health Practice Questions

Q: An egg yields about how many kcal of energy?

70 kcal. **Explanation:** The energy content of a standard whole chicken egg (average weight 50–60g) is approximately **70 kcal**. This value is derived from its macronutrient composition: a typical egg contains roughly **6g of protein** and **5g of fat**, with negligible carbohydrates. Using the Atwater factors (4 kcal/g for protein and 9 kcal/g for fat), the calculation (6×4) + (5×9) yields approximately 69 kcal, which is rounded to 70 kcal in standard nutritional and medical textbooks. **Analysis of Options:** * **Option A (70 kcal):** This is the standard physiological value accepted by the WHO and nutritional guidelines for a medium-to-large egg. * **Options B, C, and D (80, 90, 100 kcal):** These values overestimate the caloric density of a standard egg. While an extra-large or jumbo egg might approach 80–90 kcal, for medical examinations, the "reference egg" is always calculated at 70 kcal. **High-Yield Facts for NEET-PG:** * **Biological Value (BV):** The egg has the highest Biological Value (100) among all natural foods and is considered the **"Reference Protein"** against which other proteins are compared. * **Net Protein Utilization (NPU):** For an egg, the NPU is approximately 96, indicating extremely high digestibility and absorption. * **Limiting Amino Acids:** Eggs contain all essential amino acids in balanced proportions; they are notably rich in **Leucine** and **Choline**. * **Fat Content:** Most of the 70 kcal (and all the cholesterol/fat-soluble vitamins) are concentrated in the **yolk**, while the white (albumin) contains primarily protein and water.

Q: Under the Prevention of Food Adulteration Act, the minimum expected level of iodine in iodized salt at the production level is:

30 ppm. ### Explanation **1. Why 30 ppm is the Correct Answer:** Under the **Prevention of Food Adulteration (PFA) Act** (now incorporated under FSSAI), the National Iodine Deficiency Disorders Control Programme (NIDDCP) mandates specific iodine levels to ensure adequate intake despite losses during transit and storage. The minimum iodine content is fixed at **30 ppm (parts per million) at the production level** (manufacturer level). This higher concentration accounts for the inevitable degradation of iodine due to environmental factors like heat and humidity before it reaches the consumer. **2. Analysis of Incorrect Options:** * **Option B (25 ppm) & C (20 ppm):** These are intermediate values that do not correspond to the statutory requirements set by the Indian government for salt iodization. * **Option D (15 ppm):** This is a common distractor. While 30 ppm is required at the production level, **15 ppm** is the minimum required iodine level at the **consumer level** (retail/household level). The 50% reduction from production to consumption is the calculated "margin of loss." **3. High-Yield Clinical Pearls for NEET-PG:** * **Daily Requirement:** The average adult requires about **150 μg** of iodine daily. * **Indicator of Iodine Status:** The most sensitive indicator for monitoring recent iodine intake in a community is **Urinary Iodine Excretion (UIE)**. A median UIE of **100–199 μg/L** indicates adequate iodine nutrition. * **Goiter Rate:** A community is said to have endemic goiter if the Total Goiter Rate (TGR) is **>5%** among primary school-age children (6–12 years). * **Monitoring:** At the household level, iodine levels in salt are typically tested using **Rapid Diagnostic Kits (MBI kits)**, which show a color change (blue/purple) in the presence of iodine.

Q: According to the World Health Organization (WHO), what is the cutoff for anemia in adult males?

13 g/dL. **Explanation:** The diagnosis of anemia is based on hemoglobin (Hb) levels falling below the established physiological needs of an individual, which vary by age, sex, and physiological status (like pregnancy). According to **WHO criteria**, the cutoff for anemia in **adult males (≥15 years) is <13 g/dL**. This higher threshold for men is primarily due to the stimulatory effect of androgens on erythropoiesis and the absence of menstrual blood loss. **Analysis of Options:** * **Option A (13 g/dL):** Correct. This is the global standard set by the WHO for adult men. * **Option B (12 g/dL):** Incorrect. This is the cutoff for **non-pregnant adult females** (≥15 years). * **Option C (11 g/dL):** Incorrect. This is the cutoff for **pregnant women** and children aged **6–59 months**. * **Option D (10 g/dL):** Incorrect. While not a diagnostic cutoff for anemia presence, <10 g/dL is often used to classify "moderate" anemia (7.0–9.9 g/dL). **High-Yield NEET-PG Pearls:** 1. **WHO Classification of Anemia Severity (Adults):** * **Mild:** 11.0 g/dL to cutoff (12.9 for men, 11.9 for women). * **Moderate:** 7.0–9.9 g/dL. * **Severe:** 1000m) to compensate for lower oxygen partial pressure. 4. **Smokers:** Hb cutoffs are higher for smokers due to increased carboxyhemoglobin levels.

Q: Which of the following represents international food standards?

Codex Alimentarius standards. ### Explanation **Correct Answer: B. Codex Alimentarius standards** The **Codex Alimentarius** (Latin for "Food Code") is a collection of internationally recognized standards, codes of practice, and guidelines relating to food, food production, and food safety. It was established in 1963 by the **Food and Agriculture Organization (FAO)** and the **World Health Organization (WHO)**. Its primary objectives are to protect consumer health and ensure fair practices in international food trade. It serves as the global reference point for consumers, food producers, and national food control agencies. **Why other options are incorrect:** * **Bureau of Indian Standards (BIS):** This is the National Standards Body of India. While it covers food products (like ISI marks on bottled water), it is a national body, not an international one. * **Agricultural Mark (AgMark):** This is a certification mark employed on agricultural products in **India**. It ensures quality based on the Agricultural Produce (Grading and Marking) Act of 1937. * **Prevention of Food Adulteration (PFA):** This was an Indian Act (1954) aimed at ensuring pure food supply to consumers. It has since been repealed and replaced by the **FSSAI** (Food Safety and Standards Authority of India) Act, 2006. **High-Yield Facts for NEET-PG:** * **FSSAI (2006):** The current apex body for food safety in India, consolidating various older acts like PFA and AgMark. * **ISI Mark:** Issued by BIS; mandatory for items like infant foods and packaged drinking water. * **Consumer Protection:** While Codex is international, the **Consumer Protection Act (1986)** is the primary legal tool for consumer rights in India. * **Nutritional Surveillance:** Remember that the **National Institute of Nutrition (NIN)**, Hyderabad, sets the Recommended Dietary Allowances (RDA) for Indians.

Q: What is the principal impact indicator in Iodine Deficiency disorders?

Urinary Iodine Levels. **Explanation:** The assessment of Iodine Deficiency Disorders (IDD) relies on specific indicators categorized by their physiological relevance. **Urinary Iodine Excretion (UIE)** is considered the **principal impact indicator** because more than 90% of dietary iodine is eventually excreted in the urine. It serves as a sensitive, direct, and current biochemical marker of recent iodine intake (reflecting the status over the past few days). For public health monitoring, a median urinary iodine concentration of **100–199 µg/L** in school-age children indicates adequate iodine nutrition in a population. **Analysis of Incorrect Options:** * **Goitre Assessment (Option B):** This is a **process indicator** reflecting long-term cumulative exposure. While useful for baseline prevalence, goitre regresses slowly even after iodine supplementation, making it a poor indicator of recent impact or immediate changes in iodine status. * **Neonatal TSH levels (Option C):** This is a sensitive indicator of iodine deficiency during the critical period of brain development (pregnancy and early infancy). However, it is primarily used for screening congenital hypothyroidism rather than as the primary tool for general population impact monitoring. * **Salt Iodine Content (Option D):** This is a **process/input indicator**. It monitors the success of the Universal Salt Iodization (USI) program but does not measure the actual physiological status of the individuals consuming it. **High-Yield NEET-PG Pearls:** * **Best indicator for IDD monitoring in a community:** Urinary Iodine Excretion. * **Most sensitive indicator for iodine deficiency in newborns:** Neonatal TSH (levels >5 mU/L in >3% of samples indicate iodine deficiency). * **Standard Salt Iodization levels:** 30 ppm at the production level; 15 ppm at the consumer level. * **Goal of NIDDCP:** To reduce the prevalence of IDD to below 5% in the country.

Q: Which of the following is not included in the Malnutrition Universal Screening Tool (MUST) for the assessment of risk of undernutrition?

Age. The **Malnutrition Universal Screening Tool (MUST)** is a five-step screening tool designed to identify adults who are malnourished, at risk of malnutrition, or obese. It is widely used in both community and hospital settings. ### Why Age is the Correct Answer **Age** is not a parameter used in the MUST scoring system. While age is a risk factor for malnutrition, the MUST tool focuses on physiological and clinical indicators that reflect current nutritional status rather than demographic variables. ### Explanation of Incorrect Options (Components of MUST) The MUST score is calculated based on three clinical parameters: 1. **Body Mass Index (BMI):** Points are assigned based on BMI (>20 = 0; 18.5–20 = 1; 10% = 2). 3. **Acute Disease Effect:** If the patient is acutely ill and there has been or is likely to be **no nutritional intake for >5 days**, 2 points are added. ### High-Yield Clinical Pearls for NEET-PG * **Target Population:** MUST is designed for **adults**. It is not validated for pediatric populations. * **The 5 Steps of MUST:** 1. Measure height/weight (BMI). 2. Note percentage of unplanned weight loss. 3. Establish acute disease effect. 4. Add scores to determine **Overall Risk of Malnutrition** (0 = Low, 1 = Medium, 2+ = High). 5. Develop a management plan based on the risk category. * **Alternative Tools:** Do not confuse MUST with the **Mini Nutritional Assessment (MNA)**, which is specifically designed for the **elderly** (age >65) and does include age-related physiological factors.

Q: According to WHO prevalence criteria for determining xerophthalmia problems, which of the following is true for an endemic area?

Night blindness in 1% of the population. **Explanation:** Vitamin A deficiency (VAD) is a significant public health problem in many developing countries. To identify areas where xerophthalmia is a public health priority, the WHO has established specific **prevalence criteria** for children aged 6–71 months (under 6 years). **1. Why Option D is Correct:** According to WHO, **Night Blindness (XN)** is considered a public health problem if its prevalence is **≥ 1%** in the target pediatric population. Night blindness is the earliest clinical symptom of VAD and serves as a sensitive indicator for community-based screening. **2. Analysis of Incorrect Options:** * **Option A:** The cutoff for **Bitot’s spots (X1B)** is **≥ 0.5%**, not 5%. A 5% prevalence would indicate an extremely severe epidemic. * **Option B:** **Conjunctival xerosis (X1A)** is no longer included in the WHO prevalence criteria because it is subjective and lacks diagnostic reliability in field surveys. * **Option C:** The criteria for **Corneal ulceration/Keratomalacia (X3A/X3B)** is **≥ 0.01%**. While 0.05% exceeds this, the standard threshold defined by WHO is 0.01%. Additionally, the term used in the criteria is "Corneal xerosis/ulceration," not just conjunctival ulcers. **3. High-Yield Facts for NEET-PG:** * **WHO Cut-off Points (Prevalence > these values = Public Health Problem):** * Night Blindness (XN): **> 1%** * Bitot's Spots (X1B): **> 0.5%** * Corneal Xerosis/Ulcer/Keratomalacia (X2/X3A/X3B): **> 0.01%** * Xerophthalmia-related Corneal Scars (XS): **> 0.05%** * Serum Retinol ( 5%** * **Prophylaxis:** Under the National Vitamin A Prophylaxis Program, the first dose (1 lakh IU) is given at 9 months (with Measles vaccine), followed by 2 lakh IU every 6 months until age 5 (Total 9 doses/17 lakh IU).

Q: Approximate caloric requirements of an infant at the age of 12 months would be?

700 Kcal. **Explanation:** The caloric requirement of an infant is primarily determined by their rapid growth rate and high basal metabolic rate. According to the **ICMR-NIN (2020) guidelines**, the energy requirements for infants are calculated based on body weight and age. **Why 700 Kcal is correct:** For an infant aged 6–12 months, the recommended dietary allowance (RDA) is approximately **80 kcal/kg/day**. At 12 months (1 year), an average healthy Indian child weighs approximately **8.5 to 9 kg**. * Calculation: 8.9 kg × 80 kcal ≈ **712 kcal/day**. Thus, **700 Kcal** is the closest approximate value for a one-year-old. **Analysis of Incorrect Options:** * **A. 500 Kcal:** This is insufficient for a 12-month-old. This value is closer to the requirement of a newborn or a 3-month-old infant (approx. 110 kcal/kg/day for a 4.5 kg baby). * **C. 1,000 Kcal:** This is the approximate requirement for a **toddler (1–3 years)**. As growth velocity slows down after the first year, the total calories increase due to weight gain, but the kcal/kg requirement drops. * **D. 1,200 Kcal:** This exceeds the requirement for an infant and is more appropriate for a child aged 3–4 years. **High-Yield Clinical Pearls for NEET-PG:** 1. **Energy Density:** In the first 6 months, requirements are higher per unit of body weight (**108 kcal/kg**) compared to 6–12 months (**80 kcal/kg**). 2. **Protein Requirement:** For an infant (6–12 months), the protein requirement is approximately **1.05 g/kg/day** (ICMR 2020). 3. **Growth Milestone:** A baby usually **triples** its birth weight by 12 months of age, necessitating this specific caloric intake. 4. **Rule of Thumb:** Total calories for a child can be roughly estimated by the formula: $1000 + (Age\ in\ years \times 100)$. For a 1-year-old, this equals 1100 Kcal, but for strict infancy (up to 12 months), the weight-based ICMR calculation (700-800 kcal) is preferred for exams.

Question 1

An egg yields about how many kcal of energy?

Accepted Answer

70 kcal

Answer

80 kcal

Answer

90 kcal

Answer

100 kcal

Question 2

Under the Prevention of Food Adulteration Act, the minimum expected level of iodine in iodized salt at the production level is:

Accepted Answer

30 ppm

Answer

25 ppm

Answer

20 ppm

Answer

15 ppm

Question 3

According to the World Health Organization (WHO), what is the cutoff for anemia in adult males?

Accepted Answer

13 g/dL

Answer

12 g/dL

Answer

11 g/dL

Answer

10 g/dL

Question 4

Which of the following represents international food standards?

Accepted Answer

Codex Alimentarius standards

Answer

Bureau of Indian Standards (BIS) standards

Answer

Agricultural Mark (AgMark) standards

Answer

Prevention of Food Adulteration (PFA) standards

Question 5

The WHO Multicentre Growth Reference Study (MGRS) is a landmark study. Which of the following statements about the MGRS is NOT true?

Accepted Answer

It was conducted as a case-control study.

Answer

Participating countries included India, Brazil, Ghana, Oman, USA, and Norway.

Answer

The age group studied was 1-10 years.

Answer

A total of 8500 breastfed infants and young children participated.

Question 6

What is the principal impact indicator in Iodine Deficiency disorders?

Accepted Answer

Urinary Iodine Levels

Answer

Goitre assessment

Answer

Neonatal TSH levels

Answer

Salt Iodine Content

Question 7

Vegetable fat differs from animal oil in being:

Accepted Answer

Contains less fat-soluble vitamins

Answer

More saturated

Answer

More stable

Answer

More atherosclerotic

Question 8

Which of the following is not included in the Malnutrition Universal Screening Tool (MUST) for the assessment of risk of undernutrition?

Accepted Answer

Age

Answer

Body Mass Index (BMI)

Answer

Weight loss

Answer

Acute disease effect

Question 9

According to WHO prevalence criteria for determining xerophthalmia problems, which of the following is true for an endemic area?

Accepted Answer

Night blindness in 1% of the population

Answer

Bitot spot in 5% of the population under 6 years

Answer

Conjunctival xerosis in 1% of the population

Answer

Conjunctival ulcers in 0.05% of the population

Question 10

Approximate caloric requirements of an infant at the age of 12 months would be?

Accepted Answer

700 Kcal

Answer

500 Kcal

Answer

1,000 Kcal

Answer

1,200 Kcal

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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