Nutrition and Health — MCQs

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 151: Which of the following pulses contains the highest amount of protein?

A. Green gram
B. Red gram
C. Soyabean (Correct Answer)
D. Black gram

Explanation: **Explanation:** The correct answer is **Soyabean**. In the context of Community Medicine and Nutrition, pulses are the primary source of vegetable protein, especially in vegetarian diets. **1. Why Soyabean is correct:** Soyabean (*Glycine max*) is unique among pulses because it is a "rich source" of both protein and fat. It contains approximately **40-43% protein**, which is nearly double the protein content found in other common pulses. Furthermore, soy protein is considered a "complete protein" among plant sources as it contains all essential amino acids in sufficient quantities, making its biological value higher than other legumes. **2. Why other options are incorrect:** * **Green gram (Moong dal), Red gram (Arhar/Tur dal), and Black gram (Urad dal):** These are common Indian pulses. While they are excellent sources of protein, their protein content typically ranges between **20% to 25%**. * Green gram: ~24% * Red gram: ~22% * Black gram: ~24% Since 40% (Soyabean) is significantly higher than 24%, these options are incorrect. **3. High-Yield Clinical Pearls for NEET-PG:** * **Limiting Amino Acid:** Most pulses (including those in the options) are deficient in **Methionine** but rich in **Lysine**. Conversely, cereals are deficient in Lysine but rich in Methionine. This is the basis for **"Mutual Supplementation"** (e.g., Khichdi), which improves the Net Protein Utilization (NPU). * **Reference Protein:** Egg is considered the reference protein (Biological Value = 100). * **Pulse Protein Content:** Average pulses provide 20-25g of protein per 100g, while Soyabean provides 40-43g. * **Antinutritional Factors:** Pulses often contain phytates and lectins; Soyabean specifically contains **Trypsin inhibitors**, which are inactivated by thorough cooking (heat).

Question 152: Which protein quality indicator was adopted by the Indian Council of Medical Research (ICMR) when recommending dietary protein requirements?

A. Amino acid score
B. Net protein utilization (Correct Answer)
C. Biological value
D. Protein efficiency ratio

Explanation: **Explanation:** The **Net Protein Utilization (NPU)** is the primary indicator adopted by the ICMR (and the Expert Group of the National Institute of Nutrition) to adjust dietary protein recommendations for the Indian population. **Why NPU is the Correct Answer:** NPU measures the proportion of dietary protein that is actually retained by the body for maintenance and growth. It is calculated as: *NPU = (Retained Nitrogen / Intake Nitrogen) × 100* Alternatively, it is the product of **Biological Value (BV) × Digestibility Coefficient (DC)**. Since Indian diets are predominantly plant-based and have lower digestibility compared to animal proteins, the ICMR uses an average NPU of **65** to calculate the Recommended Dietary Allowance (RDA). This ensures that the quantity of protein recommended compensates for the lower quality and digestibility of the typical diet. **Why Other Options are Incorrect:** * **Amino Acid Score (A):** This is a chemical score based on the limiting amino acid compared to a reference protein (like egg). While useful for predicting quality, it does not account for human digestibility. * **Biological Value (C):** BV measures the percentage of *absorbed* nitrogen retained. It ignores the nitrogen lost during digestion (fecal loss), making it less comprehensive than NPU for dietary planning. * **Protein Efficiency Ratio (D):** This measures weight gain per gram of protein intake in growing rats. It is no longer the standard for human nutritional requirements as it overestimates the needs for growth versus maintenance. **High-Yield Clinical Pearls for NEET-PG:** * **Reference Protein:** Egg is considered the reference protein (NPU = 100). * **ICMR RDA Factor:** To convert "Safe Level" of protein to "Dietary Requirement," the ICMR divides the requirement by 0.65 (the NPU of the Indian diet). * **Limiting Amino Acids:** Pulses are deficient in **Methionine**, while Cereals are deficient in **Lysine**. This is why a cereal-pulse combination (4:1 ratio) improves the overall NPU.

Question 153: What is the recommended daily calorie intake during late pregnancy?

A. 2800 calories
B. 2300 calories (Correct Answer)
C. 1500 calories
D. 3000 calories

Explanation: ### Explanation **1. Understanding the Correct Answer (B: 2300 calories)** The nutritional requirements in pregnancy are calculated by adding a specific "extra allowance" to the woman’s pre-pregnancy sedentary requirements. According to the **ICMR-NIN (2020) guidelines**: * The Estimated Average Requirement (EAR) for a **sedentary woman** is **1660 kcal/day**. * The additional calorie requirement for pregnancy is **+350 kcal/day** (in the 2nd trimester) and **+600 kcal/day** (in the 3rd trimester). * Therefore, in late pregnancy (3rd trimester), the total requirement is approximately **1660 + 600 = 2260 kcal/day**, which rounds to the nearest option of **2300 calories**. **2. Analysis of Incorrect Options** * **A (2800 calories):** This is excessively high for a sedentary pregnant woman and may lead to gestational obesity or macrosomia. However, this might be appropriate for a woman performing *heavy* physical labor. * **C (1500 calories):** This is below the baseline requirement for a non-pregnant sedentary woman (1660 kcal). Such low intake leads to Intrauterine Growth Restriction (IUGR). * **D (3000 calories):** This far exceeds the physiological needs of pregnancy and is not supported by standard nutritional guidelines. **3. High-Yield Clinical Pearls for NEET-PG** * **Protein Requirement:** The additional protein allowance in the 3rd trimester is **+22.0 g/day** (Total ≈ 68 g/day). * **Iron:** Requirement increases to **27 mg/day** during pregnancy. * **Calcium:** The RDA remains **1000 mg/day** (same as non-pregnant adults) according to 2020 guidelines, as absorption efficiency increases. * **Weight Gain:** Recommended weight gain for a woman with a normal BMI is **10–12 kg**. * **Folic Acid:** 400 μg/day is recommended to prevent Neural Tube Defects (NTDs), ideally starting periconceptionally.

Question 154: Amongst the following fats and oils, which has the highest proportion of polyunsaturated fatty acids (PUFA)?

A. Groundnut oil
B. Coconut oil
C. Safflower oil (Correct Answer)
D. Butter

Explanation: **Explanation:** The correct answer is **Safflower oil**. The classification of dietary fats is based on the predominance of fatty acid chains: Saturated (SFA), Monounsaturated (MUFA), and Polyunsaturated (PUFA). PUFAs are essential fatty acids (like Linoleic acid) that the body cannot synthesize. **Why Safflower Oil is Correct:** Safflower oil contains the highest concentration of PUFA among common edible oils, approximately **73-75%**. It is primarily composed of Linoleic acid (n-6). In the context of NEET-PG, it is often compared with Sunflower oil (approx. 60-65% PUFA) and Soyabean oil (approx. 60% PUFA). **Analysis of Incorrect Options:** * **Coconut oil:** This is the richest source of **Saturated Fatty Acids (SFA)**, containing about 92%. It is unique because it is high in Medium Chain Triglycerides (MCTs). * **Butter:** An animal fat high in **Saturated Fatty Acids** and cholesterol. It contains roughly 60-65% SFA and very low PUFA (approx. 2-4%). * **Groundnut oil:** This is a balanced oil but is primarily known for being rich in **Monounsaturated Fatty Acids (MUFA)**, specifically Oleic acid. It contains about 40-50% MUFA and only 30% PUFA. **High-Yield Clinical Pearls for NEET-PG:** * **Highest PUFA:** Safflower oil (~75%). * **Highest MUFA:** Olive oil (~75%), followed by Groundnut oil. * **Highest SFA:** Coconut oil (~92%). * **P/S Ratio:** The recommended Polyunsaturated to Saturated fat ratio for a healthy diet is **0.8 – 1.0**. * **Essential Fatty Acids:** Linoleic acid (n-6) and Linolenic acid (n-3) are the two primary PUFAs required in the diet to prevent deficiency syndromes like Phrynoderma (Toad skin).

Question 155: Which of the following statements regarding the refining of oils is NOT TRUE?

A. Refining is done using steam, alkali, etc.
B. It removes free fatty acids and rancid material from oil.
C. It increases the unsaturated fatty acid content of the oil. (Correct Answer)
D. Refined oils are generally more costly than unrefined oils.

Explanation: ### Explanation The primary objective of **refining vegetable oils** is to improve the oil's quality, shelf life, and appearance by removing impurities. It is a physical and chemical process that does not alter the fundamental fatty acid profile of the oil. **Why Option C is the Correct Answer (The False Statement):** Refining is a purification process, not a chemical modification of the carbon chains. It **does not change the fatty acid composition** (the ratio of saturated to unsaturated fats). Increasing the unsaturated fatty acid content would require complex chemical synthesis, while decreasing it (making it more saturated) occurs during *hydrogenation*, not refining [1]. **Analysis of Other Options:** * **Option A:** Refining involves several steps, including **degumming** (using water/acid), **neutralization** (using alkali like NaOH to remove free fatty acids), and **deodorization** (using high-temperature steam). * **Option B:** The process effectively removes **Free Fatty Acids (FFAs)**, which cause acidity, and volatile oxidative products (rancid materials) that cause off-flavors and odors. * **Option C:** Due to the additional industrial processing steps, energy consumption, and loss of some oil volume during purification, refined oils are **more expensive** than crude/unrefined oils [1]. --- ### High-Yield Clinical Pearls for NEET-PG * **Refining vs. Hydrogenation:** Refining removes impurities; Hydrogenation converts liquid oils into solid fats (vanaspati) and creates harmful **Trans-fatty acids** [1]. * **Nutrient Loss:** Refining often removes natural antioxidants like **Vitamin E (Tocopherols)** and pigments like Beta-carotene. * **SFA vs. PUFA:** For a healthy heart, the recommended P:S (Polyunsaturated to Saturated) ratio is **0.8 to 1.0** [2]. * **Adulteration:** Argemone oil is a common adulterant in mustard oil, leading to **Epidemic Dropsy** (due to Sanguinarine toxin).

Question 156: Which type of milk among the following has the lowest protein content?

A. Human milk (Correct Answer)
B. Goat milk
C. Cow milk
D. Buffalo milk

Explanation: **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%).

Question 157: All of the following are used to assess the mid-upper arm circumference except?

A. Bangle test
B. Shakir tape method
C. Quac stick
D. Harpenden calliper (Correct Answer)

Explanation: 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.

Question 158: Clinical features presented below are due to deficiency of:

A. Tryptophan (Correct Answer)
B. Cysteine
C. Glutamine
D. Phenylalanine

Explanation: ***Tryptophan*** - **Tryptophan deficiency** leads to **pellagra**, characterized by the classic **4 D's**: Dermatitis, Diarrhea, Dementia, and Death. - Tryptophan serves as a precursor for **niacin (vitamin B3) synthesis**, and its deficiency results in **niacin deficiency** causing pellagra. *Cysteine* - **Cysteine deficiency** primarily affects **protein synthesis** and **antioxidant production** (glutathione), not causing pellagra symptoms. - Deficiency may lead to **hair and nail problems** or **immune dysfunction**, but not the classic 4 D's. *Glutamine* - **Glutamine deficiency** mainly affects **intestinal barrier function** and **immune cell metabolism**, particularly during stress or illness. - Does not cause **dermatitis**, **dementia**, or the characteristic **pellagra symptoms**. *Phenylalanine* - **Phenylalanine deficiency** is extremely rare and would primarily affect **protein synthesis** and **tyrosine production**. - Does not lead to **pellagra** or the **4 D's** characteristic of niacin/tryptophan deficiency.

Question 159: Which one of the following cooking oils contains the highest percentage of linoleic acid?

A. Safflower oil (Correct Answer)
B. Sunflower oil
C. Corn oil
D. Groundnut oil

Explanation: **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).

Question 160: What is the total recommended amount of iron supplementation during pregnancy?

A. 600 mg
B. 800 mg
C. 1000 mg (Correct Answer)
D. 1200 mg

Explanation: ### Explanation **1. Why 1000 mg is the Correct Answer:** The total iron requirement during a normal singleton pregnancy is approximately **1000 mg**. This physiological demand is distributed as follows: * **300 mg:** For the fetus and placenta. * **500 mg:** For the expansion of maternal red cell mass (erythropoiesis). * **200 mg:** To cover obligatory losses through the skin, urine, and stools. While the body "saves" about 250–300 mg due to amenorrhea, the net requirement remains significantly higher than pre-pregnancy levels, necessitating supplementation to prevent Iron Deficiency Anemia (IDA). **2. Analysis of Incorrect Options:** * **600 mg (Option A):** This is an underestimate. It barely covers the maternal red cell expansion and obligatory losses, leaving nothing for the fetus. * **800 mg (Option B):** While closer to the net requirement (after accounting for amenorrhea savings), it does not represent the "total" physiological demand of 1000 mg cited in standard textbooks like Park’s PSM and Williams Obstetrics. * **1200 mg (Option D):** This exceeds the standard physiological requirement for a normal pregnancy, though it might be reached in multifetal gestations. **3. High-Yield Clinical Pearls for NEET-PG:** * **IFA Regimen (Anemia Mukt Bharat):** Prophylactic dose is **60 mg elemental iron + 500 mcg Folic Acid** daily for 180 days (starting from the 2nd trimester/14 weeks) and continued for 180 days postpartum. * **Therapeutic Dose:** If a pregnant woman is diagnosed with anemia, the dose is doubled (two tablets daily). * **Iron Absorption:** Best absorbed on an empty stomach with Vitamin C (citrus fruits); inhibited by tea, coffee, and calcium. * **Daily Requirement:** In the second half of pregnancy, the daily requirement jumps to approximately **5–7 mg/day**.

Practice by Chapter

Basic Nutritional Requirements

Practice Questions

Assessment of Nutritional Status

Practice Questions

Protein-Energy Malnutrition

Practice Questions

Micronutrient Deficiencies

Practice Questions

Nutritional Programs in India

Practice Questions

Dietary Guidelines

Practice Questions

Food Safety and Security

Practice Questions

Diet and Non-Communicable Diseases

Practice Questions

Nutrition in Pregnancy and Lactation

Practice Questions

Infant and Young Child Nutrition

Practice Questions

Nutrition in Emergencies

Practice Questions

Food Fortification and Supplementation

Practice Questions

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