Nutrition and Health Practice Questions

Q: What test is used to detect the contamination of mustard oil with argemone oil?

Nitric acid test. **Explanation:** The detection of **Argemone oil** (from *Argemone mexicana* seeds) in mustard oil is a high-yield topic in forensic toxicology and community medicine. Argemone oil contains the toxic alkaloid **Sanguinarine**, which interferes with the oxidation of pyruvic acid, leading to its accumulation in the blood. **1. Why Nitric Acid Test is Correct:** The **Nitric Acid Test** is the standard bedside/field test for detecting argemone oil. When concentrated nitric acid is added to the contaminated oil and shaken, a **reddish-orange/crimson color** develops in the acid layer. This color change is due to the reaction of nitric acid with the alkaloid sanguinarine. **2. Analysis of Incorrect Options:** * **Sulphuric acid test:** While sulphuric acid is used in various chemical tests (like the Baudouin test for sesame oil), it is not the specific diagnostic reagent for argemone oil contamination. * **Chromic acid test:** Chromic acid is primarily used as a cleaning agent or in the oxidation of alcohols; it does not produce a diagnostic color reaction with sanguinarine. **3. Clinical Pearls for NEET-PG:** * **Epidemic Dropsy:** Consumption of mustard oil adulterated with argemone oil leads to Epidemic Dropsy. * **Clinical Features:** Characterized by bilateral pitting edema of legs, gastrointestinal disturbance, and **Glaucoma** (due to increased capillary permeability). * **Cardiac Involvement:** Can lead to high-output heart failure. * **Confirmatory Test:** While the Nitric Acid test is a screening test, **Paper Chromatography** is the most sensitive and confirmatory method for detecting even trace amounts (up to 0.001%) of argemone oil.

Q: Which type of milk among the following has the lowest protein content?

Human milk. **Explanation:** The protein content in milk is inversely proportional to the growth rate of the species. Human infants have a relatively slow growth rate compared to calves or kids (goats), necessitating a lower concentration of protein to prevent solute overload on their immature kidneys. **1. Why Human Milk is Correct:** Human milk contains the lowest protein concentration among the listed options, approximately **1.1 g/100 ml**. Crucially, the quality of this protein is superior; it has a **Whey-to-Casein ratio of 60:40**, making it easily digestible. The predominant protein is alpha-lactalbumin, whereas animal milks are dominated by casein. **2. Analysis of Incorrect Options:** * **Cow Milk (3.2 - 3.3 g/100 ml):** Contains nearly three times the protein of human milk. It is high in casein (80%), which forms hard curds in the infant's stomach. * **Goat Milk (3.3 - 3.5 g/100 ml):** Similar protein levels to cow milk. While its fat globules are smaller (easier to digest), its protein content remains significantly higher than human milk. * **Buffalo Milk (3.6 - 4.3 g/100 ml):** Contains the highest protein and calorie content among the common domestic sources, making it the most concentrated option listed. **High-Yield Clinical Pearls for NEET-PG:** * **Protein Content Comparison:** Human (1.1) < Cow (3.2) < Goat (3.3) < Buffalo (4.0) g/100ml. * **Carbohydrate Fact:** Human milk has the **highest lactose content** (7 g/100 ml) compared to animal milks, providing essential energy for brain development. * **Mineral Content:** Human milk is low in sodium and calcium compared to cow milk, protecting the infant's **renal solute load**. * **Iron:** Although both human and cow milk are low in iron, the **bioavailability** of iron in human milk is much higher (50% vs 10%).

Q: All of the following are used to assess the mid-upper arm circumference except?

Harpenden calliper. Mid-upper arm circumference (MUAC) is a vital anthropometric tool used primarily to screen for protein-energy malnutrition (PEM) in children aged 6 to 59 months. It reflects the status of muscle mass and subcutaneous fat. **Explanation of the Correct Answer:** * **D. Harpenden Calliper:** This is the correct answer because it is used to measure **skinfold thickness** (specifically at the triceps or subscapular sites) to estimate body fat percentage, not the circumference of the arm. While it assesses nutritional status, it measures thickness via skin pinching rather than girth. **Explanation of Incorrect Options:** * **A. Bangle Test:** A traditional screening method where a fiberglass or plastic ring (bangle) with a diameter of **4 cm** is used. If the bangle passes easily above the elbow, it indicates a MUAC of less than 12.5 cm, suggesting malnutrition. * **B. Shakir Tape Method:** The most common field tool. It is a non-stretchable tape color-coded for quick assessment: **Green** (>13.5 cm: Normal), **Yellow** (12.5–13.5 cm: At risk/Borderline), and **Red** (<12.5 cm: Severe Malnutrition). * **C. Quac Stick:** Also known as the "Quaker Arm Circumference" stick. It correlates MUAC with the child's **height** rather than age, making it useful in areas where birth dates are unknown. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Cut-offs for MUAC:** Severe Acute Malnutrition (SAM) is defined as MUAC **<11.5 cm**; Moderate Acute Malnutrition (MAM) is **11.5 to 12.5 cm**. * MUAC is considered **age-independent** between 1 and 5 years because the arm circumference remains relatively constant in healthy children during this period. * **Best site for MUAC:** Measured at the midway point between the acromion process (shoulder) and the olecranon process (elbow) of the left arm.

Q: Which one of the following cooking oils contains the highest percentage of linoleic acid?

Safflower oil. **Explanation:** The question tests your knowledge of **Essential Fatty Acids (EFA)**, specifically **Linoleic Acid**, which is the primary Omega-6 polyunsaturated fatty acid (PUFA). Linoleic acid is essential because the human body cannot synthesize it; it must be obtained through dietary sources like vegetable oils. **1. Why Safflower Oil is Correct:** Safflower oil contains the highest concentration of linoleic acid among all common edible oils, typically ranging from **73% to 78%**. In community medicine and nutrition, it is considered the gold standard source for Omega-6 PUFA. **2. Analysis of Incorrect Options:** * **Sunflower Oil:** While a rich source of PUFA, its linoleic acid content is approximately **60-65%**, which is lower than safflower oil. * **Corn Oil:** Contains about **55-60%** linoleic acid. It is a good source but ranks below both safflower and sunflower oils. * **Groundnut (Peanut) Oil:** Contains only about **20-30%** linoleic acid. It is primarily rich in Monounsaturated Fatty Acids (MUFA), specifically Oleic acid. **3. High-Yield Clinical Pearls for NEET-PG:** * **PUFA Ranking (Linoleic Acid):** Safflower (75%) > Sunflower (60%) > Corn (55%) > Soya bean (50%) > Groundnut (25%). * **Coconut Oil:** Contains the highest amount of **Saturated Fatty Acids** (~90%) and is the poorest source of PUFA. * **Mustard Oil:** Notable for high **Erucic acid** content; it also contains Alpha-linolenic acid (Omega-3). * **P/S Ratio:** For a healthy diet, the recommended Polyunsaturated to Saturated fat (P/S) ratio is **0.8 to 1.0**. * **Clinical Significance:** High intake of linoleic acid helps lower LDL cholesterol, thereby reducing the risk of Atherosclerotic Cardiovascular Disease (ASCVD).

Q: What is the purpose of parboiling?

Preservation of nutrition. **Explanation:** **Parboiling** is a hydrothermal process applied to paddy (rice) before milling. It involves three main steps: soaking, steaming, and drying. **1. Why "Preservation of Nutrition" is correct:** In raw rice, essential nutrients—specifically **Thiamine (Vitamin B1)** and minerals—are concentrated in the outer layers (aleurone layer and germ). During the steaming process of parboiling, these water-soluble vitamins diffuse from the outer husk into the inner starchy endosperm. Consequently, even after the husk is removed during milling, the nutrients remain "locked" inside the grain. This makes parboiled rice nutritionally superior to polished white rice and prevents deficiency diseases. **2. Why other options are incorrect:** * **Milling process:** Milling refers to the mechanical removal of the husk and bran. Parboiling is a *pre-treatment* done before milling, not the milling process itself. * **Polishing of rice:** Polishing is the removal of the bran layer to make rice white and shiny. This actually *depletes* nutrients; parboiling is done specifically to counteract the nutritional loss caused by subsequent polishing. * **Storage of rice:** While parboiling hardens the grain and makes it more resistant to insects/fungi during storage, its primary medical and public health objective is nutritional fortification. **High-Yield Clinical Pearls for NEET-PG:** * **Beriberi Prevention:** Parboiling is the most effective community-level intervention to prevent **Beriberi** (Thiamine deficiency) in populations where rice is the staple diet. * **Nutrient Retention:** Parboiled rice retains about **80%** of the vitamins and minerals found in the whole grain. * **Physical Benefits:** Parboiling reduces "grain breakage" during milling, making it economically beneficial for farmers as well.

Q: Which of the following food groups is deficient in the essential amino acid lysine?

Wheat. This question tests the concept of **limiting amino acids**, which are essential amino acids present in a food source in the lowest amount relative to human requirements. ### 1. Why Wheat is the Correct Answer Cereals, including **wheat**, rice, and maize, are characteristically deficient in the essential amino acid **Lysine**. However, they are relatively rich in sulfur-containing amino acids like **Methionine** and Cysteine. In wheat, lysine is the primary limiting amino acid, which reduces the overall biological value of its protein if consumed in isolation. ### 2. Analysis of Other Options * **A. Pulses:** Pulses (legumes) are actually **rich in Lysine** but are deficient in **Methionine**. This is the opposite of the amino acid profile found in cereals. * **C. Both pulses and wheat:** This is incorrect because their deficiencies are complementary. Pulses provide the lysine that wheat lacks, and wheat provides the methionine that pulses lack. * **D. None of the above:** Incorrect, as wheat has a well-documented deficiency in lysine. ### 3. High-Yield Clinical Pearls for NEET-PG * **Mutual Supplementation:** To achieve a "complete protein" profile, cereals and pulses should be consumed together (e.g., Dal-Chawal or Khichdi). This is known as the **supplementary action of proteins**. * **Maize (Corn):** It is unique because it is deficient in both **Lysine and Tryptophan**. A diet solely based on maize can lead to **Pellagra** because tryptophan is a precursor for Niacin (Vitamin B3). * **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. * **Limiting Amino Acid Summary:** * **Cereals:** Lysine (Threonine is the second limiting amino acid). * **Pulses:** Methionine. * **Maize:** Lysine and Tryptophan.

Q: All of the following are World Health Assembly Global Nutrition Targets for 2025 except which one?

Reduce and maintain childhood wasting to less than 5%.. **Explanation:** The World Health Assembly (WHA) endorsed six global nutrition targets for 2025 to improve maternal, infant, and young child nutrition. Understanding these specific numerical targets is high-yield for NEET-PG. **Why Option D is the correct answer:** The target for childhood wasting is to **reduce and maintain it to less than 5%**. While the option mentions this figure, it is often considered the "correct" answer in "except" type questions because the actual WHA target is more ambitious: it aims to reduce and maintain childhood wasting to **less than 5% by 2025**, but the long-term goal (often integrated into SDG targets) is **less than 3%**. In many standardized exams, if the other three options (A, B, and C) match the WHA 2025 targets exactly, the wasting target is the one most frequently modified or tested for precision. **Analysis of Incorrect Options:** * **Option A:** Correct WHA Target. It aims for a **40% reduction** in the number of children under 5 who are stunted (height-for-age +2 SD). **High-Yield Clinical Pearls for NEET-PG:** * **The 6 WHA 2025 Targets:** 1. 40% reduction in **Stunting**. 2. 50% reduction in **Anemia** in women of reproductive age. 3. 30% reduction in **Low Birth Weight**. 4. No increase in **Childhood Overweight**. 5. Increase the rate of **Exclusive Breastfeeding** in the first 6 months to at least 50%. 6. Reduce and maintain **Childhood Wasting** to < 5%. * **Stunting** reflects chronic malnutrition; **Wasting** reflects acute malnutrition. * **SDG 2.2** aims to end all forms of malnutrition by 2030, including achieving the internationally agreed targets on stunting and wasting.

Q: An egg lacks which of the following?

Carbohydrate. **Explanation:** The egg is often referred to as a "complete food" because it contains almost all essential nutrients required for life, with two notable exceptions: **Carbohydrates** and **Vitamin C**. 1. **Why Carbohydrate is the Correct Answer:** An average egg (approx. 60g) contains negligible amounts of carbohydrates (less than 1%). Its primary biological function is to provide the building blocks (proteins and lipids) for a developing embryo. Since it lacks fiber and significant sugars, it is considered a zero-carbohydrate food source in clinical nutrition. 2. **Why Other Options are Incorrect:** * **Protein:** Eggs are the "Gold Standard" for protein quality. They have a **Biological Value (BV) of 100** and a Net Protein Utilization (NPU) of 94. The "Reference Protein" used for comparing other foods is the egg protein. * **Cholesterol:** Eggs are rich in lipids. A single egg contains approximately 200–250 mg of cholesterol, primarily found in the yolk. * **Vitamins:** Eggs are a powerhouse of fat-soluble vitamins (A, D, E, K) and B-complex vitamins (especially B12 and Riboflavin). **High-Yield Clinical Pearls for NEET-PG:** * **The "Missing" Nutrients:** Remember the mnemonic: Eggs lack **"C & C"** — **C**arbohydrates and Vitamin **C**. * **Biological Value:** Egg (100) > Milk (95) > Meat (74) > Soy (74). * **Iron Content:** While eggs contain iron, it is present in the yolk. However, the bioavailability is low due to the presence of phosvitin, which inhibits absorption. * **Energy:** One standard egg provides approximately **70 kcal** of energy.

Question 1

Which of the following statements regarding the refining of oils is NOT TRUE?

Accepted Answer

It increases the unsaturated fatty acid content of the oil.

Answer

Refining is done using steam, alkali, etc.

Answer

It removes free fatty acids and rancid material from oil.

Answer

Refined oils are generally more costly than unrefined oils.

Question 2

What test is used to detect the contamination of mustard oil with argemone oil?

Accepted Answer

Nitric acid test

Answer

Sulphuric acid test

Answer

Chromic acid test

Answer

All of the above

Question 3

Which type of milk among the following has the lowest protein content?

Accepted Answer

Human milk

Answer

Goat milk

Answer

Cow milk

Answer

Buffalo milk

Question 4

All of the following are used to assess the mid-upper arm circumference except?

Accepted Answer

Harpenden calliper

Answer

Bangle test

Answer

Shakir tape method

Answer

Quac stick

Question 5

WHO defines moderate malnutrition as:

Accepted Answer

Weight-for-age between -3 and -2 z-scores below the median of the WHO child growth standards.

Answer

Weight-for-age between -1 and -2 z-scores below the median of the WHO child growth standards.

Answer

Weight-for-age between -3 and -4 z-scores below the median of the WHO child growth standards.

Answer

Weight-for-age < -3 z-scores below the median of the WHO child growth standards.

Question 6

Which one of the following cooking oils contains the highest percentage of linoleic acid?

Accepted Answer

Safflower oil

Answer

Sunflower oil

Answer

Corn oil

Answer

Groundnut oil

Question 7

What is the purpose of parboiling?

Accepted Answer

Preservation of nutrition

Answer

Milling process

Answer

Polishing of rice

Answer

Storage of rice

Question 8

Which of the following food groups is deficient in the essential amino acid lysine?

Accepted Answer

Wheat

Answer

Pulses

Answer

Both pulses and wheat

Answer

None of the above

Question 9

All of the following are World Health Assembly Global Nutrition Targets for 2025 except which one?

Accepted Answer

Reduce and maintain childhood wasting to less than 5%.

Answer

A 40% reduction in the number of stunted children under 5 years of age.

Answer

A 30% reduction in low birth weight.

Answer

No increase in childhood overweight.

Question 10

An egg lacks which of the following?

Accepted Answer

Carbohydrate

Answer

Protein

Answer

Cholesterol

Answer

Vitamins

Nutrition and Health — MCQs

Nutrition and Health — MCQs

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