Nutrition and Health Practice Questions

Q: What is the recommended daily dose of folic acid for women of childbearing age?

0.4 mg. **Explanation:** The correct answer is **0.4 mg**. Folic acid (Vitamin B9) is essential for DNA synthesis and amino acid metabolism. For women of childbearing age, the primary goal of supplementation is the prevention of **Neural Tube Defects (NTDs)** like spina bifida and anencephaly. Since the neural tube closes by the 28th day of gestation—often before a woman knows she is pregnant—periconceptional supplementation is vital. * **Why 0.4 mg is correct:** International and national guidelines (including WHO and MoHFW) recommend a daily dose of **400 micrograms (mcg)** for all women of reproductive age. Numerically, 400 mcg is equivalent to **0.4 mg**. * **Option A (400 micrograms):** While mathematically identical to 0.4 mg, in the context of this specific MCQ format, 0.4 mg is the standard unit used in clinical guidelines and pharmacological labeling for this recommendation. * **Option B (40 micrograms):** This dose is sub-therapeutic and insufficient to prevent NTDs. * **Option C (0.5 mg):** This is slightly higher than the standard recommendation for low-risk pregnancies. However, **5 mg (not 0.5 mg)** is the dose recommended for "high-risk" women (those with a previous history of a child with NTD, diabetes, or on anti-epileptic drugs). **High-Yield Clinical Pearls for NEET-PG:** 1. **Timing:** Supplementation should ideally start **4 weeks before conception** and continue through the **first trimester** (12 weeks). 2. **IFA Tablets (National Program):** Under the *Anemia Mukt Bharat* strategy, WRA (Women of Reproductive Age) receive 60 mg elemental Iron + 500 mcg (0.5 mg) Folic Acid weekly. 3. **High-Risk Dose:** 5 mg/day is the standard for secondary prevention of NTDs. 4. **Food Fortification:** Folic acid is the most common nutrient used in the fortification of wheat flour and rice to improve public health outcomes.

Q: What is the recommended daily extra calorie requirement during the first trimester of pregnancy?

150 calories. **Explanation:** The nutritional requirements during pregnancy are governed by the physiological needs of the growing fetus, placenta, and maternal tissue expansion. According to the **ICMR-NIN (2020) guidelines**, the energy requirements for pregnancy are now categorized by trimester to reflect the progressive metabolic demands. **1. Why 150 calories is correct:** During the **first trimester**, fetal growth is minimal (embryogenesis phase), but maternal physiological changes begin. The ICMR-NIN recommends an additional **+350 kcal/day** as an average across the entire pregnancy; however, when broken down by stages, the first trimester requires only **+150 kcal/day**. This is a significant update from older guidelines that suggested no extra calories were needed in the first three months. **2. Analysis of Incorrect Options:** * **Option A (50 kcal):** This value is too low to support the initial metabolic shifts and hormonal changes occurring in early pregnancy. * **Option C (350 kcal):** This is the recommended extra allowance for the **second trimester**. It is also the "average" figure often cited in older textbooks for the entire duration of pregnancy. * **Option D (450 kcal):** This is the recommended extra allowance for the **third trimester**, where fetal weight gain is most rapid and energy demands are at their peak. **High-Yield Clinical Pearls for NEET-PG:** * **Lactation:** Requires **+600 kcal/day** (0–6 months) and **+520 kcal/day** (6–12 months). * **Protein:** The additional protein requirement for pregnancy (ICMR 2020) is **+9.5 g/day** (2nd trimester) and **+22.0 g/day** (3rd trimester). * **Weight Gain:** A woman with a normal BMI should ideally gain **10–12 kg** during pregnancy. * **Iron:** Requirement is **27 mg/day** (previously 35 mg/day in older guidelines).

Q: Fortification of foods with specific nutrients, such as adding iodine to salt, is an example of which level of prevention?

Primary prevention. **Explanation:** **1. Why Primary Prevention is Correct:** Primary prevention aims to prevent the onset of a disease by controlling causes and risk factors. It is applied during the **pre-pathogenesis phase** (before the disease process has started). Food fortification (e.g., iodized salt, Vitamin A in oil, or Iron in flour) falls under the strategy of **Health Promotion** and **Specific Protection**. By adding essential nutrients to commonly consumed foods, the goal is to ensure the population maintains an optimal nutritional status, thereby preventing the development of deficiency diseases. **2. Why Other Options are Incorrect:** * **Primordial Prevention:** This involves preventing the emergence or establishment of social, economic, and cultural patterns of living that are known to contribute to elevated risk of disease (e.g., discouraging children from starting smoking). Fortification deals with an existing nutritional gap rather than preventing the "risk of a risk." * **Secondary Prevention:** This focuses on **early diagnosis and prompt treatment** (e.g., screening tests like Pap smears or sputum microscopy for TB). It occurs during the early pathogenesis phase to arrest the disease process. * **Tertiary Prevention:** This occurs in the late pathogenesis phase, focusing on **disability limitation and rehabilitation** (e.g., physiotherapy after a stroke) to reduce the impact of long-term disease. **3. NEET-PG Clinical Pearls:** * **Specific Protection:** Includes immunization, chemoprophylaxis, and use of specific nutrients (fortification). * **Iodized Salt:** The most successful example of fortification in India under the National Iodine Deficiency Disorders Control Programme (NIDDCP). * **Double Fortified Salt (DFS):** Contains both **Iodine and Iron** to combat goiter and nutritional anemia simultaneously. * **Golden Rice:** A genetically modified crop fortified with **Beta-carotene** (Vitamin A precursor).

Q: Which of the following is a semi-essential amino acid?

Arginine. ### Explanation Amino acids are categorized based on the body's ability to synthesize them. **Semi-essential (conditionally essential) amino acids** are those that can be synthesized by the body under normal physiological conditions, but the rate of synthesis becomes insufficient during periods of rapid growth, severe stress, or illness. **1. Why Arginine is Correct:** Arginine is the classic example of a semi-essential amino acid. While the urea cycle produces arginine, the amount synthesized is inadequate to meet the high metabolic demands of growing children, pregnant women, or patients recovering from major trauma/surgery. Therefore, it must be supplemented through the diet during these specific life stages. **2. Analysis of Incorrect Options:** * **B. Lysine & C. Leucine:** These are **Essential Amino Acids (EAA)**. The human body lacks the biochemical pathways to synthesize them *de novo*. They must be obtained entirely from dietary sources. * **D. Histidine:** While some older texts classified Histidine as semi-essential, it is now strictly categorized as an **Essential Amino Acid** for both infants and adults in modern nutritional science (though the requirement in adults is lower). **3. 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). * *Note:* Arginine and Histidine are often grouped as "semi-essential" in older MCQ patterns, but if both are present, **Arginine** is the most preferred answer for "semi-essential." * **Purely Ketogenic Amino Acids:** Leucine and Lysine (the only two). * **Limiting Amino Acids:** Pulse proteins are usually deficient in Methionine, while Cereal proteins are deficient in Lysine and Threonine. This is why a cereal-pulse combination (e.g., Dal-Chawal) provides a "complete" protein profile.

Q: Which of the following is considered a goitrogen?

Cabbage. **Explanation:** **Cabbage** is the correct answer because it belongs to the **Brassica genus** (Cruciferous vegetables), which contains naturally occurring substances known as **goitrogens**. 1. **Mechanism:** Goitrogens are substances that interfere with iodine uptake by the thyroid gland or inhibit the enzyme thyroid peroxidase. In the case of cabbage, cauliflower, and mustard, they contain **thiocyanates** and **isothiocyanates**. These compounds compete with iodine for transport into the thyroid, potentially leading to a decrease in thyroxine (T4) production, a compensatory rise in TSH, and subsequent thyroid enlargement (goiter). 2. **Incorrect Options:** * **Papaya:** A rich source of Vitamin A and C; it does not contain goitrogenic compounds. * **Spinach:** While it contains oxalates (which can interfere with calcium absorption), it is not classified as a primary goitrogen. * **Orange:** A citrus fruit primarily known for Vitamin C and flavonoids; it has no inhibitory effect on thyroid function. **High-Yield Clinical Pearls for NEET-PG:** * **Common Goitrogens:** Cabbage, Cauliflower, Cassava (contains cyanogenic glycosides), Tapioca, Mustard, and Soya bean. * **Environmental Goitrogens:** High fluoride in water and certain pollutants can also act as goitrogens. * **Public Health Note:** The goitrogenic effect of vegetables like cabbage is usually only clinically significant in the presence of **concomitant iodine deficiency**. Cooking/boiling these vegetables often inactivates the goitrogenic enzymes (myrosinase), reducing their antithyroid activity. * **Endemic Goiter:** Defined when the prevalence of goiter in a community is >5%.

Q: Expressed breast milk can be stored at room temperature for how long?

6-8 hours. ### Explanation **Correct Option: D (6-8 hours)** Expressed Breast Milk (EBM) has unique antibacterial properties, primarily due to the presence of lysozymes, lactoferrin, and secretory IgA, which inhibit the growth of pathogens. According to standard guidelines (including IAP and WHO), EBM remains safe and bacteriologically stable at **room temperature (up to 25°C) for 6 to 8 hours**. In warmer tropical climates (above 25°C), it is generally advised to limit this to 4 hours, but for examination purposes, the standard range is 6-8 hours. **Analysis of Incorrect Options:** * **Options A & B:** These durations are too conservative. While EBM is best used fresh, its natural preservative properties allow it to last significantly longer than 2-3 hours without spoiling. * **Option C:** While 4-5 hours is safe, it does not represent the maximum duration of stability at room temperature. Standard medical textbooks and public health guidelines define the upper limit as 8 hours. **High-Yield Clinical Pearls for NEET-PG:** * **Refrigerator Storage (4°C):** EBM can be stored for up to **24 hours** (some guidelines suggest up to 3-5 days in clinical settings, but 24 hours is the standard teaching for home safety). * **Deep Freezer (-18°C to -20°C):** EBM can be stored for **3 to 6 months**. * **Thawing:** EBM should be thawed in the refrigerator or by placing the container in warm water. **Never microwave** EBM as it destroys heat-sensitive antibodies and creates "hot spots" that can burn the infant. * **Colostrum:** Known as the "first vaccine," it is rich in IgA and minerals, secreted during the first 2-3 days postpartum.

Q: In comparison to cow's milk, human milk has low contents of all except?

Iron. **Explanation:** The core concept behind this question is the comparative nutritional profile of human milk versus cow's milk. Human milk is specifically designed for the human infant's growth and physiological needs, whereas cow's milk is designed for the rapid growth of a calf. **Why Iron is the Correct Answer:** While the absolute quantity of iron in both human milk and cow’s milk is relatively low (approx. 0.5 mg/L), **human milk actually contains slightly more iron than cow's milk.** More importantly, the **bioavailability** of iron in human milk is significantly higher (50-70%) compared to cow's milk (only 10%). Therefore, human milk does not have "low content" relative to cow's milk in this comparison. **Analysis of Incorrect Options:** * **A & B (Sodium and Chloride):** Cow's milk contains significantly higher amounts of electrolytes (Sodium, Potassium, and Chloride). This high solute load can be taxing on an infant's immature kidneys, which is why unmodified cow's milk is avoided in early infancy. * **C (Protein):** Cow's milk has about 3 times the protein content (3.5g/100ml) of human milk (1.1g/100ml). Human milk protein is primarily whey-based (easier to digest), while cow's milk is primarily casein-based. **High-Yield Facts for NEET-PG:** * **Carbohydrates:** Human milk has **higher Lactose** content (7g/dl) compared to cow's milk (4g/dl), which aids in calcium absorption and brain development. * **Vitamins:** Human milk is low in Vitamin K and Vitamin D; hence, supplementation is often required. * **Protective Factors:** Human milk is rich in IgA, lactoferrin, and lysozymes, which are absent or negligible in cow's milk. * **Fat:** Human milk contains more essential fatty acids and DHA/ARA for neurodevelopment.

Q: What does BOAA stand for?

Beta-oxalyl aminoalanine. **Explanation:** **BOAA (Beta-oxalyl aminoalanine)**, also known as **BAPN** (Beta-amino-propionitrile) in some contexts or **ODAP** (Oxalyldiaminoproponic acid), is a potent neurotoxin found in the seeds of *Lathyrus sativus* (Khesari Dal). 1. **Why Option A is Correct:** BOAA is the specific non-protein amino acid responsible for **Neurolathyrism**. It acts as an excitatory neurotoxin (glutamate analogue) that causes the death of upper motor neurons. This leads to spastic paraplegia, characterized by a "scissoring gait." It typically affects individuals who consume Khesari Dal as a staple diet (more than 30% of total calorie intake) for 3–6 months. 2. **Why Other Options are Incorrect:** * **Option B & C:** These are distractors using phonetically similar words (Arginine, Arsenic). There is no clinical entity associated with "amino-arginine" or "amino-arsenic" in the context of Lathyrism. * **Option D:** "Amino transferase" refers to a class of enzymes (like ALT/AST) involved in protein metabolism, not a toxin found in pulses. **High-Yield Clinical Pearls for NEET-PG:** * **Safe Limit:** Khesari Dal is safe if it constitutes less than 30% of the diet. * **Prevention:** BOAA is water-soluble. It can be removed by **steeping** (soaking in hot water and draining) or **parboiling**. * **Lathyrism Stages:** It progresses from a non-spastic stage to a crawl stage. * **Mnemonic:** Remember **BOAA** = **B**eta-**O**xalyl **A**mino**A**lanine. * **Adulteration:** Khesari Dal is often used to adulterate Arhar/Toor Dal due to its similar appearance.

Question 1

What is the recommended daily dose of folic acid for women of childbearing age?

Accepted Answer

0.4 mg

Answer

400 micrograms

Answer

40 micrograms

Answer

0.5 mg

Question 2

What is the recommended daily extra calorie requirement during the first trimester of pregnancy?

Accepted Answer

150 calories

Answer

50 calories

Answer

350 calories

Answer

450 calories

Question 3

Human milk is deficient in which of the following nutrients?

Accepted Answer

Protein

Answer

Iron

Answer

Vitamin C

Answer

Vitamin A

Question 4

Fortification of foods with specific nutrients, such as adding iodine to salt, is an example of which level of prevention?

Accepted Answer

Primary prevention

Answer

Primordial prevention

Answer

Secondary prevention

Answer

Tertiary prevention

Question 5

Which of the following is a semi-essential amino acid?

Accepted Answer

Arginine

Answer

Lysine

Answer

Leucine

Answer

Histidine

Question 6

Which of the following is considered a goitrogen?

Accepted Answer

Cabbage

Answer

Papaya

Answer

Spinach

Answer

Orange

Question 7

Expressed breast milk can be stored at room temperature for how long?

Accepted Answer

6-8 hours

Answer

Less than 2 hours

Answer

2-3 hours

Answer

4-5 hours

Question 8

In comparison to cow's milk, human milk has low contents of all except?

Accepted Answer

Iron

Answer

Sodium

Answer

Chloride

Answer

Protein

Question 9

According to the traffic light diet plan for children, which of the following best describes a 'green light' food?

Accepted Answer

Low in calories, high in fiber, low in fat, and nutrient-dense

Answer

Nutrient-dense, but higher in calories and fat

Answer

High in calories, sugar, and fat

Answer

None of the above

Question 10

What does BOAA stand for?

Accepted Answer

Beta-oxalyl aminoalanine

Answer

Beta-oxalyl amino-arginine

Answer

Beta-oxalyl amino-arsenic

Answer

Beta-oxalyl amino transferase

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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