Nutrition and Health Practice Questions

Q: What is the approximate amount of lactose in grams per 100 grams of human breast milk?

7.5. ### Explanation The correct answer is **7.5 g/100 ml** (Option D). **1. Why Option D is Correct:** Human breast milk is uniquely designed to support the rapid brain development of human infants. It contains a significantly higher concentration of **lactose** (the primary carbohydrate) compared to animal milk. On average, human milk contains **7.0 to 7.5 grams of lactose per 100 ml**. This high lactose content provides a steady source of glucose for the brain and promotes the growth of *Lactobacillus bifidus* in the gut, which maintains an acidic environment to inhibit pathogens. **2. Why the Other Options are Incorrect:** * **Options A (3.4) and B (4.4):** These values are more characteristic of **Cow’s Milk**, which contains approximately **4.4 to 4.8 g/100 ml** of lactose. Cow’s milk is higher in protein (3.2g) but lower in carbohydrates compared to human milk. * **Option C (5.1):** This is an intermediate value that does not represent the standard physiological composition of mature human breast milk. **3. High-Yield Clinical Pearls for NEET-PG:** To differentiate between Human Milk and Cow's Milk (per 100 ml), remember the **"Rule of 7-1-3"** for Human Milk: * **Carbohydrates (Lactose):** ~7.0 g (Cow's milk: ~4.5 g) * **Proteins:** ~1.1 g (Cow's milk: ~3.2 g — *Cow's milk has 3x more protein, mainly casein*) * **Fats:** ~3.4 g (Cow's milk: ~3.4 g — *Total fat is similar, but human milk has more PUFAs/DHA*) * **Energy:** Both provide approximately **65–67 kcal/100 ml**. * **Minerals:** Human milk has a lower solute load (Calcium/Phosphorus), making it easier on neonatal kidneys.

Q: What will be the BMI of a male whose weight is 89 kg and height is 172 cm?

30. **Explanation:** **1. Calculation & Correct Answer:** Body Mass Index (BMI), also known as Quetelet’s Index, is a key anthropometric measure used to classify nutritional status. The formula is: **BMI = Weight (kg) / [Height (m)]²** * **Step 1:** Convert height from cm to meters: $172\text{ cm} = 1.72\text{ m}$. * **Step 2:** Square the height: $1.72 \times 1.72 = 2.9584$. * **Step 3:** Divide weight by height squared: $89 / 2.9584 \approx 30.08$. Rounding to the nearest whole number gives **30**, making Option B the correct answer. **2. Analysis of Incorrect Options:** * **Option A (27):** This would be the result if the weight were approximately 80 kg. A BMI of 27 falls under the "Overweight" category. * **Option C (33):** This would require a weight of approximately 98 kg. This falls under Class I Obesity. * **Option D (36):** This would require a weight of approximately 106 kg. This falls under Class II Obesity. **3. High-Yield Clinical Pearls for NEET-PG:** * **WHO Classification (Global):** * Underweight: $<18.5$ * Normal: $18.5–24.9$ * Overweight: $25–29.9$ * Obesity: $\geq 30$ (Class I: $30–34.9$; Class II: $35–39.9$; Class III: $\geq 40$) * **Revised Classification for Asians (India):** Due to higher body fat percentages at lower BMIs, the cut-offs are lower: * Normal: $18.5–22.9\text{ kg/m}^2$ * Overweight: $23–24.9\text{ kg/m}^2$ * Obesity: $\geq 25\text{ kg/m}^2$ * **Ponderal Index:** $\text{Weight (kg)} / \text{Height (m)}^3$. It is considered more sensitive than BMI for certain populations. * **Corpulence Index:** Actual weight / Desired weight.

Q: The toxin responsible for Lathyrism is

BOAA. **Explanation:** **Lathyrism** is a nervous system disorder caused by the excessive consumption of *Lathyrus sativus* (Khesari dal). 1. **Correct Answer: A (BOAA)** The toxin responsible is **BOAA (Beta-oxalyl-amino-alanine)**, also known as **ODAP** (Oxalyldiaminopropionic acid). It is a potent neurotoxin and an excitatory amino acid analogue that causes the death of upper motor neurons. This leads to **Neurolathyrism**, characterized by spastic paraplegia of the lower limbs. 2. **Analysis of Incorrect Options:** * **B. Sanguinarine:** This toxin is found in **Argemone mexicana** (Prickly poppy) seeds. When mixed with mustard oil, it causes **Epidemic Dropsy**, characterized by bilateral edema, cardiac failure, and glaucoma. * **C. Pyrazolidine alkaloid:** These are found in **Crotalaria** seeds (Jhunjhunia). Consumption leads to **Veno-Occlusive Disease (VOD)** of the liver. * **D. Calotoxin:** This is a cardiac glycoside found in *Calotropis* species, primarily acting as a gastrointestinal irritant and cardiac poison. **High-Yield NEET-PG Pearls:** * **Safe Limit:** Lathyrus dal is considered safe if it constitutes less than **30%** of the total diet. * **Stages of Lathyrism:** Non-stick stage → One-stick stage → Two-stick stage → Crawler stage. * **Prevention:** * **Parboiling:** Steeping the seeds in hot water and draining (removes 90% of BOAA). * **Sun-drying:** Less effective than parboiling. * **Banning:** The sale of Khesari dal was historically banned under PFA acts to prevent outbreaks. * **Age/Sex Predilection:** Most common in males aged 15–45 years.

Q: A person's height is 174 cm and their weight is 89 kg. What is their BMI classification?

Pre-obese. **Explanation:** To determine the BMI classification, we first calculate the Body Mass Index (BMI) using Quetelet’s Index formula: **BMI = Weight (kg) / [Height (m)]²** 1. **Conversion:** Height = 174 cm = 1.74 m. 2. **Calculation:** BMI = 89 / (1.74 × 1.74) = 89 / 3.0276 ≈ **29.4 kg/m²**. According to the **WHO Classification of BMI**, a value of 29.4 kg/m² falls into the **Pre-obese** category (25.00 – 29.99 kg/m²). **Analysis of Options:** * **A. Underweight:** Defined as a BMI **< 18.5 kg/m²**. * **B. Normal weight:** Defined as a BMI between **18.5 – 24.99 kg/m²**. * **C. Pre-obese (Correct):** Defined as **25.0 – 29.99 kg/m²**. This is the stage where intervention is most effective to prevent clinical obesity. * **D. Obese:** Defined as a BMI **≥ 30 kg/m²**. (Obese Class I: 30–34.9; Class II: 35–39.9; Class III: ≥ 40). **High-Yield NEET-PG Pearls:** * **Asian-Indian Specific Criteria:** For the Indian population, the cut-offs are lower due to higher body fat percentages at lower BMIs. Normal: 18.5–22.9; Overweight/Pre-obese: **23–24.9**; Obese: **≥ 25**. * **Ponderal Index:** Calculated as $Height (cm) / \sqrt[3]{Weight (kg)}$. It is considered a more sensitive indicator of physical build than BMI. * **Waist-Hip Ratio (WHR):** A better predictor of metabolic risk than BMI. Risk increases if WHR is **> 0.9 in men** or **> 0.85 in women**.

Q: Which of the following is most commonly used for protein utilization?

Net protein utilization (NPU). **Explanation:** Protein quality is assessed based on digestibility and the biological value of the amino acids present. **Net Protein Utilization (NPU)** is the most commonly used index for protein utilization because it combines both **digestibility** and **biological value** into a single measure. It represents the proportion of dietary protein that is actually retained by the body. Since it accounts for digestive losses, it provides a more practical reflection of how well a protein source meets the body's nitrogen requirements compared to Biological Value (BV) alone. **Analysis of Options:** * **Biological Value (BV):** This measures the percentage of absorbed nitrogen retained by the body. While accurate for metabolic utilization, it does not account for how much protein was lost during digestion (fecal loss). * **Amino Acid Score:** This is a chemical score that compares the essential amino acid content of a test protein with a reference protein (e.g., egg). It measures potential quality rather than actual physiological utilization. * **Protein Efficiency Ratio (PER):** This measures weight gain per gram of protein intake, usually in growing rats. It is less accurate for humans as weight gain does not always correlate strictly with protein retention. **High-Yield Facts for NEET-PG:** * **Formula:** $NPU = \text{Biological Value} \times \text{Digestibility Coefficient} / 100$. * **Reference Protein:** Egg is considered the "standard" or "reference protein" with an NPU of 100. * **Limiting Amino Acids:** Pulses are deficient in **Methionine**, while Cereals are deficient in **Lysine**. * **Pulse-Cereal Mix:** A ratio of **1:4** (Pulse:Cereal) is recommended to achieve a complementary amino acid profile, enhancing the overall NPU of a vegetarian diet.

Q: Which microorganisms are known to commonly enter freshly laid eggs?

Salmonella. **Explanation:** **Salmonella** (specifically *Salmonella Enteritidis* and *Salmonella Typhimurium*) is the primary microorganism associated with freshly laid eggs. This occurs through two mechanisms: 1. **Vertical Transmission (Transovarian):** The bacteria infect the hen’s ovaries or oviduct, becoming incorporated into the egg contents (yolk or albumen) before the shell is formed. 2. **Horizontal Transmission:** Fecal contamination on the eggshell surface can penetrate the porous shell shortly after the egg is laid. **Analysis of Incorrect Options:** * **Brucella:** Primarily transmitted through unpasteurized dairy products (milk/cheese) or direct contact with infected livestock (cattle, goats, pigs). It is not typically associated with poultry or eggs. * **Shigella:** Primarily transmitted via the fecal-oral route through contaminated water or food handled by infected individuals (the "4 Fs": Fingers, Flies, Food, Feces). It does not naturally infect the reproductive tract of poultry. * **Vibrio cholerae:** An aquatic bacterium transmitted via contaminated water or seafood. It is not a pathogen found in the internal environment of a freshly laid egg. **High-Yield Clinical Pearls for NEET-PG:** * **Salmonella** is the most common cause of food poisoning worldwide; eggs and poultry are the most frequent vehicles. * **Cooking:** Salmonella is heat-labile; thorough cooking (until yolk and white are firm) or pasteurization of eggs kills the bacteria. * **Storage:** Eggs should be stored at temperatures below 4°C (40°F) to prevent the multiplication of Salmonella. * **Public Health:** In Community Medicine, the "Egg-borne" transmission of Salmonellosis is a classic example of a zoonotic infection entering the human food chain.

Q: What is the cause of epidemic dropsy?

Sanguinarine. **Explanation:** **Epidemic Dropsy** is a clinical condition caused by the consumption of mustard oil contaminated with **Argemone mexicana** (prickly poppy) seeds. The seeds contain the toxic alkaloid **Sanguinarine**, which interferes with cellular oxidation and leads to increased capillary permeability and dilatation. * **Why Sanguinarine is correct:** Sanguinarine (and its metabolite dihydrosanguinarine) causes widespread capillary leakage. This results in the classic triad of symptoms: **bilateral pitting edema** (dropsy), gastrointestinal disturbances, and cardiovascular manifestations. A high-yield complication is **Glaucoma**, which occurs due to increased production of aqueous humor. **Analysis of Incorrect Options:** * **A. Pyrrolizidine:** These alkaloids are found in *Crotalaria* seeds (Jhunjhunia) and are responsible for **Veno-Occlusive Disease (VOD)** of the liver, leading to ascites and hepatomegaly. * **C. Fusarium toxin:** Specifically T-2 toxin, it contaminates moldy grains and is associated with **Alimentary Toxic Aleukia (ATA)**. * **D. BOAA (Beta-Oxalyl-Amino-Alanine):** This neurotoxin is found in *Lathyrus sativus* (Khesari Dal) and causes **Lathyrism**, a condition characterized by spastic paraplegia. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** The **Nitric Acid Test** or Paper Chromatography is used to detect Argemone oil in mustard oil. * **Key Feature:** Sudden onset of non-inflammatory bilateral pedal edema. * **Cardiac Impact:** Can lead to high-output heart failure. * **Cutaneous Sign:** Sarcoid-like skin lesions (telangiectasia) may be seen.

Q: Beta-oxalo amino alanine is the toxin responsible for the manifestation of which condition?

Lathyrism. **Explanation:** **Lathyrism** is a form of permanent spastic paralysis caused by the excessive consumption of *Lathyrus sativus* (Khesari dal). The underlying toxin is **Beta-oxalyl-amino-alanine (BOAA)**, also known as **ODAP** (beta-N-oxalyl-L-alpha,beta-diaminopropionic acid). This neurotoxin acts as a glutamate analogue, causing excitotoxicity and subsequent destruction of the upper motor neurons in the spinal cord. It typically affects young men (15–45 years) and manifests in four clinical stages: Latent, No-stick, One-stick, and Two-stick/Crawler stage. **Analysis of Incorrect Options:** * **Epidemic Dropsy:** Caused by the ingestion of mustard oil contaminated with **Argemone mexicana** seeds. The responsible toxin is **Sanguinarine**, which leads to oxidative stress and capillary leakage (presenting as bilateral edema, cardiac failure, and glaucoma). * **Staphylococcal Food Poisoning:** Caused by the ingestion of pre-formed **Enterotoxins** (Type A-E) produced by *Staphylococcus aureus*. It is characterized by a very short incubation period (1–6 hours) and prominent vomiting. * **Endemic Ascites:** Caused by the consumption of cereals contaminated with seeds of **Crotalaria** (Jhunjhunia). The toxin involved is **Pyrrolizidine Alkaloid**, which causes Hepato-Veno Occlusive Disease (HVOD). **High-Yield NEET-PG Pearls:** * **Prevention of Lathyrism:** The safest method to remove BOAA is **steeping** (soaking in hot water) or **parboiling**. * **Lathyrism vs. Dropsy:** Remember "Lathyrism = Leg paralysis (BOAA)" vs. "Dropsy = Dilated heart/edema (Sanguinarine)." * **Legal Limit:** The PFA Act previously banned Khesari dal, but recent guidelines focus on limiting its consumption to less than 30% of the total diet to prevent toxicity.

Q: Endemic ascites is caused by which of the following?

Jhunjhunia seeds. **Explanation:** **Endemic Ascites** (also known as Veno-Occlusive Disease) is caused by the consumption of **Jhunjhunia seeds** (*Crotalaria spectabilis*). These seeds often contaminate staple crops like millet. They contain **Pyrrolizidine alkaloids** (such as monocrotaline), which are hepatotoxic. These toxins cause the narrowing and occlusion of small intrahepatic venules, leading to portal hypertension, rapid onset of ascites, and hepatomegaly. **Analysis of Options:** * **A. Argemone mexicana:** Contamination of mustard oil with these seeds causes **Epidemic Dropsy**. The toxin involved is **Sanguinarine**, which leads to widespread capillary leakage, bilateral edema, and cardiac failure, rather than isolated endemic ascites. * **B. Khesari dal (*Lathyrus sativus*):** Excessive consumption leads to **Lathyrism**, a non-inflammatory degenerative condition of the spinal cord. The toxin **BOAA** (Beta-oxalyl-amino-alanine) causes spastic paralysis of the lower limbs. * **D. Ergot poisoning:** Caused by the fungus *Claviceps purpurea* infecting food grains (like Bajra). It leads to **Ergotism**, characterized by peripheral vasoconstriction (gangrene) or neurological symptoms (convulsions), but not ascites. **High-Yield Clinical Pearls for NEET-PG:** * **Jhunjhunia Seeds:** Associated with Veno-Occlusive Disease (VOD). * **Epidemic Dropsy:** Key features include bilateral pitting edema, erythema of skin, and **Glaucoma**. * **Lathyrism:** Prevention involves "Parboiling" or soaking the dal in hot water to remove BOAA. * **Aflatoxin:** Produced by *Aspergillus flavus*; associated with groundnuts and linked to **Hepatocellular Carcinoma**.

Q: As per RCH II, what is the recommended Vitamin A dosage at 9 months of age?

1 lakh units. **Explanation:** The Vitamin A Prophylaxis Program in India, integrated under RCH II and the National Immunization Schedule, aims to prevent nutritional blindness. Vitamin A is a fat-soluble vitamin essential for maintaining epithelial integrity and retinal function. **Why 1 Lakh Units is Correct:** The first dose of Vitamin A is administered at **9 months of age**, coinciding with the Measles/MR-1 vaccine. At this age, the recommended dose is **1 lakh International Units (IU)**, which is equivalent to 1 ml of the syrup. This lower initial dose is chosen to minimize the risk of transient side effects like bulging fontanelles in younger infants while providing sufficient stores to the liver. **Analysis of Incorrect Options:** * **A. 50,000 units:** This dose is not part of the standard prophylactic schedule for infants at 9 months. * **C. 1.5 lakh units:** There is no standard prophylactic dose of 1.5 lakh units in the national schedule. * **D. 2 lakh units:** This is the dose administered for all subsequent doses (2nd to 9th dose) starting from **18 months** of age until 5 years. **High-Yield Clinical Pearls for NEET-PG:** * **Total Doses:** A child receives a total of **9 doses** of Vitamin A by age 5. * **Cumulative Dose:** The total cumulative dose administered is **17 lakh IU** (1 lakh + [8 × 2 lakh]). * **Interval:** The minimum interval between two doses is **6 months**. * **Treatment Dose:** In cases of clinical Xerophthalmia or severe malnutrition, the treatment dose is 2 lakh IU (1 lakh for infants <6 months) given on days 0, 1, and 14. * **Post-partum:** A single dose of 2 lakh IU is recommended for mothers within 6 weeks of delivery (if not already integrated into local protocols).

Question 1

What is the approximate amount of lactose in grams per 100 grams of human breast milk?

Accepted Answer

7.5

Answer

3.4

Answer

4.4

Answer

5.1

Question 2

What will be the BMI of a male whose weight is 89 kg and height is 172 cm?

Accepted Answer

30

Answer

27

Answer

33

Answer

36

Question 3

The toxin responsible for Lathyrism is

Accepted Answer

BOAA

Answer

Sanguinarine

Answer

Pyrazolidine alkaloid

Answer

Calotoxin

Question 4

A person's height is 174 cm and their weight is 89 kg. What is their BMI classification?

Accepted Answer

Pre-obese

Answer

Underweight

Answer

Normal weight

Answer

Obese

Question 5

Which of the following is most commonly used for protein utilization?

Accepted Answer

Net protein utilization (NPU)

Answer

Amino acid score

Answer

Biological value

Answer

Protein efficiency ratio

Question 6

Which microorganisms are known to commonly enter freshly laid eggs?

Accepted Answer

Salmonella

Answer

Brucella

Answer

Shigella

Answer

Vibrio cholerae

Question 7

What is the cause of epidemic dropsy?

Accepted Answer

Sanguinarine

Answer

Pyrolizidine

Answer

Fusarium toxin

Answer

BOAA

Question 8

Beta-oxalo amino alanine is the toxin responsible for the manifestation of which condition?

Accepted Answer

Lathyrism

Answer

Epidemic dropsy

Answer

Staphylococcal food poisoning

Answer

Endemic ascites

Question 9

Endemic ascites is caused by which of the following?

Accepted Answer

Jhunjhunia seeds

Answer

Argemone mexicana seed

Answer

Khesari dal

Answer

Ergot poisoning

Question 10

As per RCH II, what is the recommended Vitamin A dosage at 9 months of age?

Accepted Answer

1 lakh units

Answer

50,000 units

Answer

1.5 lakh units

Answer

2 lakh units

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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