Nutrition and Health — MCQs

A 50-year-old male patient with a history of hypertension, currently on medication, presents for a routine checkup. Laboratory investigations show plasma cholesterol levels of 5.8 mmol/L and random blood sugar of 180 mg/dL. The physician advised dietary restrictions to prevent arteriosclerosis. Which of the following factors does NOT contribute to the development of arteriosclerosis?

Q426Easy

What is the recommended daily protein intake (in gm/kg/day) for a female child aged 13-15 years?

Q427Easy

What is the recommended percentage of fat intake in a prudent diet?

Q428Easy

Which of the following are suggestions to improve the nutritional value of the Mid-day meal program?

Q429Easy

What is the recommended concentration of anhydrous glucose in ORS for reduced osmolarity?

Q430Easy

Which of the following is NOT an essential fatty acid?

Nutrition and Health Indian Medical PG Practice Questions and MCQs

Question 421: Bitot's spots are seen in which part of the eye?

A. Conjunctiva (Correct Answer)
B. Cornea
C. Retina
D. Vitreous

Explanation: **Explanation:** Bitot’s spots are a hallmark clinical sign of **Vitamin A deficiency (VAD)**. They are characterized by triangular, foamy, silvery-white patches that typically appear on the **bulbar conjunctiva**, most commonly on the temporal side. **1. Why Conjunctiva is Correct:** Vitamin A is essential for maintaining the integrity of epithelial surfaces. Deficiency leads to **squamous metaplasia** of the conjunctival epithelium and a loss of goblet cells. This results in keratinization and the accumulation of keratin debris mixed with *Corynebacterium xerosis* gas bubbles, forming the characteristic "foamy" Bitot’s spot on the conjunctiva. **2. Why other options are incorrect:** * **Cornea:** While VAD affects the cornea, it manifests as **Corneal Xerosis** (X2) or **Keratomalacia** (X3A/X3B), which are later and more severe stages involving liquefactive necrosis. * **Retina:** VAD affects the retina by impairing the regeneration of rhodopsin, leading to **Night Blindness (Nyctalopia)**, but it does not cause visible "spots" on the retina. * **Vitreous:** The vitreous humor is a clear gel and is not primarily involved in the epithelial changes associated with Vitamin A deficiency. **Clinical Pearls for NEET-PG:** * **WHO Classification (Xerophthalmia):** * **X1A:** Conjunctival Xerosis * **X1B:** Bitot’s Spots (Earliest *objective* sign) * **XN:** Night Blindness (Earliest *subjective* symptom) * **Reversibility:** Bitot’s spots in children are usually reversible with Vitamin A supplementation, but in adults, they may represent permanent "sequelae" of past deficiency. * **Management:** Treatment involves the standard WHO schedule: 200,000 IU of Vitamin A orally on Day 0, Day 1, and Day 14 (half dose for infants 6–12 months).

Question 422: What is the general glycemic index of fruits?

A. Low (Correct Answer)
B. Medium
C. High
D. None

Explanation: **Explanation:** The **Glycemic Index (GI)** is a ranking of carbohydrates on a scale of 0 to 100 based on how quickly they raise blood glucose levels after consumption. **Why Option A is Correct:** Most whole fruits have a **low glycemic index (GI < 55)**. Despite containing natural sugars (fructose), fruits are rich in **soluble dietary fiber** (like pectin) and organic acids. Fiber slows down the digestion and absorption of glucose in the small intestine, preventing rapid insulin spikes. Additionally, the fructose in fruit must be processed by the liver before it affects blood sugar levels, further contributing to a lower GI compared to refined starches. **Why Other Options are Incorrect:** * **Medium (GI 56–69):** Only a few tropical fruits like papaya, pineapple, and cantaloupe fall into this category. They are the exception, not the general rule. * **High (GI > 70):** This category is reserved for refined grains (white bread), potatoes, and watermelons. Most fruits do not reach this threshold. * **None:** This is incorrect as all carbohydrate-containing foods possess a measurable glycemic index. **NEET-PG High-Yield Pearls:** 1. **Glycemic Load (GL):** This is a more accurate clinical predictor than GI because it accounts for the **portion size** (GL = GI × Carbohydrate per serving / 100). 2. **Form Matters:** Whole fruits have a low GI, but **fruit juices** have a high GI because the fiber matrix is removed, leading to rapid absorption. 3. **Ripeness:** As a fruit (like a banana) ripens, its starch converts to sugar, increasing its GI. 4. **Diabetes Management:** Patients are encouraged to consume low-GI fruits (apples, pears, oranges) to improve glycemic control and satiety.

Question 423: What serum albumin level is considered a mild degree of malnutrition?

A. 4.0 g/dL
B. 3.5 g/dL (Correct Answer)
C. 3.0 g/dL
D. 2.5 g/dL

Explanation: **Explanation:** Serum albumin is a widely used biochemical marker for assessing visceral protein status and chronic nutritional depletion. Because albumin has a relatively long half-life (approximately 20 days), it reflects long-term nutritional status rather than acute changes. **1. Why Option B is Correct:** In clinical nutrition, the standard classification for malnutrition based on serum albumin levels is: * **Normal:** 3.5 to 5.0 g/dL * **Mild Malnutrition:** 2.8 to 3.4 g/dL (often rounded or thresholded at **3.5 g/dL** in many standardized exams to represent the start of the deficit). * **Moderate Malnutrition:** 2.1 to 2.7 g/dL * **Severe Malnutrition:** < 2.1 g/dL **2. Analysis of Incorrect Options:** * **Option A (4.0 g/dL):** This falls within the reference range for a healthy, well-nourished individual. * **Option C (3.0 g/dL):** While this indicates malnutrition, it is typically categorized as the lower end of "mild" or the beginning of "moderate" depletion depending on the specific scale used (e.g., Blackburn’s or WHO criteria). * **Option D (2.5 g/dL):** This level signifies **moderate to severe** malnutrition and is often associated with the development of nutritional edema (as seen in Kwashiorkor). **3. High-Yield Clinical Pearls for NEET-PG:** * **Half-life:** Albumin (20 days) is for chronic status; **Pre-albumin** (2 days) and **Retinol-binding protein** (12 hours) are better for monitoring acute nutritional changes. * **Negative Acute Phase Reactant:** Albumin levels drop during infection, inflammation, or trauma regardless of nutritional intake; thus, it must be interpreted cautiously in hospitalized patients. * **Kwashiorkor:** Hypoalbuminemia is the hallmark of Kwashiorkor, leading to decreased oncotic pressure and subsequent edema.

Question 424: Sorghum contains a good amount of which amino acid?

A. Lysine
B. Arginine
C. Leucine (Correct Answer)
D. Histidine

Explanation: **Explanation:** The correct answer is **Leucine**. **1. Why Leucine is correct:** Sorghum (Jowar) is unique among cereals because it contains a disproportionately high concentration of the amino acid **Leucine**. While most cereals are deficient in certain essential amino acids, sorghum's high leucine content is clinically significant. Excess leucine interferes with the conversion of Tryptophan to Niacin (Vitamin B3) by inhibiting the enzyme *quinolinate phosphoribosyl transferase (QPRT)*. This biochemical imbalance leads to a secondary deficiency of Niacin, which is the underlying cause of **Pellagra** in populations where sorghum is the staple diet. **2. Analysis of Incorrect Options:** * **Lysine:** This is the **limiting amino acid** in almost all cereals, including sorghum. Cereals are characteristically deficient in lysine but rich in methionine. * **Arginine & Histidine:** These are semi-essential amino acids. While present in grains, they are not found in excess in sorghum and do not have the specific clinical association with disease (like the Leucine-Pellagra link) that makes Leucine a high-yield topic for exams. **3. Clinical Pearls for NEET-PG:** * **The Pellagra Connection:** Pellagra is traditionally associated with **Maize** (due to bound niacin/niacytin) and **Sorghum** (due to high leucine). * **Limiting Amino Acids:** * Cereals: Lysine (Deficient), Methionine (Rich). * Pulses: Methionine (Deficient), Lysine (Rich). * **Mutual Supplementation:** This is why a cereal-pulse combination (e.g., Dal-Chawal) provides a complete protein profile, as they compensate for each other's deficiencies. * **Pellagra Symptoms (4 Ds):** Dermatitis (Casal’s necklace), Diarrhea, Dementia, and Death.

Question 425: A 50-year-old male patient with a history of hypertension, currently on medication, presents for a routine checkup. Laboratory investigations show plasma cholesterol levels of 5.8 mmol/L and random blood sugar of 180 mg/dL. The physician advised dietary restrictions to prevent arteriosclerosis. Which of the following factors does NOT contribute to the development of arteriosclerosis?

A. High plasma cholesterol levels
B. Diets high in cholesterol
C. Elevated blood triacylglycerol
D. Low LDL:HDL cholesterol ratio (Correct Answer)

Explanation: **Explanation** The correct answer is **D. Low LDL:HDL cholesterol ratio.** **1. Why the correct answer is right:** Arteriosclerosis is driven by the accumulation of lipids in the arterial walls. To assess cardiovascular risk, the **LDL:HDL ratio** is a critical predictor. * **LDL (Low-Density Lipoprotein)** is "bad cholesterol" because it transports cholesterol from the liver to the tissues (pro-atherogenic). * **HDL (High-Density Lipoprotein)** is "good cholesterol" because it promotes reverse cholesterol transport, moving lipids from the tissues back to the liver (anti-atherogenic). A **low ratio** indicates either low LDL or high HDL levels, both of which are **protective** against arteriosclerosis. Conversely, a high ratio is a major risk factor. **2. Why the other options are wrong:** * **A & B (High plasma/dietary cholesterol):** Elevated circulating cholesterol (hypercholesterolemia), often driven by diets rich in saturated fats and cholesterol, leads to endothelial injury and the formation of foam cells, the hallmark of atherosclerotic plaques. * **C (Elevated blood triacylglycerol):** Hypertriglyceridemia is an independent risk factor for cardiovascular disease. High triglycerides often correlate with low HDL levels and the presence of small, dense LDL particles, which are highly prone to oxidation and plaque formation. **3. NEET-PG High-Yield Pearls:** * **Atherogenic Index:** The ratio of Total Cholesterol/HDL (>4.5) or LDL/HDL (>3.5) is considered a significant risk factor for Ischemic Heart Disease (IHD). * **Protective Factors:** HDL levels >60 mg/dL are considered cardioprotective. * **Dietary Goal:** For prevention of atherosclerosis, saturated fat intake should be <7% of total energy, and dietary cholesterol should be <200 mg/day. * **Rule of Thumb:** "LDL is **L**ethal; HDL is **H**ealthy."

Question 426: What is the recommended daily protein intake (in gm/kg/day) for a female child aged 13-15 years?

A. 0.95 (Correct Answer)
B. 0.68
C. 1.00
D. 1.33

Explanation: This question is based on the **ICMR-NIN (2020) Dietary Guidelines for Indians**, which revised the Recommended Dietary Allowances (RDA) for various age groups. ### **Explanation of the Correct Answer** **Option A (0.95 gm/kg/day)** is the correct RDA for a female child aged **13–15 years**. During adolescence, protein requirements are elevated to support the rapid "pubertal growth spurt," lean body mass development, and hormonal changes. The ICMR 2020 guidelines shifted from a fixed gram-per-day value to a weight-based calculation for children and adolescents to ensure precision based on growth velocity. ### **Analysis of Incorrect Options** * **Option B (0.68 gm/kg/day):** This is the RDA for **sedentary adult males and females**. In the 2020 guidelines, the protein requirement for adults was reduced from 1.0 g/kg to 0.83 g/kg (estimated average requirement) with an RDA of 0.66–0.83 g/kg. * **Option C (1.00 gm/kg/day):** This was the older RDA (ICMR 2010) for most age groups. It is no longer the standard for the 13–15 age bracket under the revised 2020 guidelines. * **Option D (1.33 gm/kg/day):** This value is significantly higher and is more characteristic of the protein requirements for **infants (6–12 months)**, who require higher protein density per kg of body weight for rapid initial growth. ### **High-Yield NEET-PG Pearls** * **Reference Body Weight (ICMR 2020):** Adult Male = 65 kg; Adult Female = 55 kg. * **Adolescent Protein (13–15 yrs):** Boys require **0.90 g/kg/day**, while Girls require **0.95 g/kg/day**. Note that girls have a slightly higher requirement per kg in this specific bracket due to earlier pubertal onset. * **Pregnancy/Lactation:** Always remember to add the "additional" protein requirements to the base RDA (e.g., +22.0 g/day in the 3rd trimester). * **Net Protein Utilization (NPU):** The safe intake is calculated based on a protein quality (NPU) of 100.

Question 427: What is the recommended percentage of fat intake in a prudent diet?

A. Less than 10-15%
B. Less than 5-10%
C. Less than 15-20%
D. Less than 20-30% (Correct Answer)

Explanation: ### Explanation **1. Understanding the Correct Answer (Option D: Less than 20-30%)** A **Prudent Diet** is a balanced dietary pattern designed to prevent chronic non-communicable diseases (NCDs) such as obesity, hypertension, and cardiovascular diseases. According to WHO and standard nutritional guidelines, the total fat intake in a prudent diet should be limited to **less than 20-30% of the total daily energy intake**. The goal is to provide enough essential fatty acids and fat-soluble vitamins while avoiding caloric excess. Within this 30%, the quality of fat matters: saturated fats should be <10%, and trans-fats should be <1% of total energy. **2. Analysis of Incorrect Options** * **Options A, B, and C:** These ranges (5% to 20%) are considered **too restrictive**. Very low-fat diets (below 15%) can lead to deficiencies in essential fatty acids (like Linoleic and Linolenic acid) and impair the absorption of fat-soluble vitamins (A, D, E, and K). Furthermore, extremely low fat intake often leads to a compensatory increase in refined carbohydrate consumption, which can elevate triglycerides and lower HDL levels. **3. High-Yield Clinical Pearls for NEET-PG** * **Dietary Fiber:** A prudent diet recommends an intake of **~40g/2000 kcal** (or 25-30g/day). * **Salt Intake:** Should be restricted to **less than 5g per day** to prevent hypertension. * **Refined Sugars:** Should constitute **less than 10%** (ideally <5%) of total energy. * **P:S Ratio:** The recommended Polyunsaturated to Saturated fatty acid ratio in a balanced diet is **0.8 to 1.0**. * **Cholesterol:** Dietary cholesterol should be limited to **less than 300 mg/day**.

Question 428: Which of the following are suggestions to improve the nutritional value of the Mid-day meal program?

A. Sprouted pulses should be added as they have more nutrients. (Correct Answer)
B. The cereals to pulse ratio should be 1:3.
C. Rice water left after cooking should be mixed with dal.
D. Food grains should be stored away from moist areas.

Explanation: ### Explanation **1. Why Option A is Correct:** Sprouting (germination) is a high-yield nutritional intervention. It significantly increases the bioavailability of nutrients in pulses. Specifically, sprouting increases **Vitamin C** content, enhances **B-complex vitamins** (riboflavin, niacin, and choline), and reduces **anti-nutritional factors** like phytic acid and tannins. This process makes iron and calcium more absorbable, directly addressing common deficiencies in school-going children. **2. Analysis of Incorrect Options:** * **Option B:** The recommended cereal-to-pulse ratio for a balanced protein profile in the Mid-day Meal (MDM) is **5:1 or 4:1**, not 1:3. This ensures a proper balance of essential amino acids (lysine from pulses and methionine from cereals). * **Option C:** While rice water (kanji) contains some B-vitamins, the primary recommendation to prevent nutrient loss is to **avoid washing rice excessively** before cooking and to use the **"absorption method"** (using just enough water so none is discarded). Mixing discarded water with dal is a secondary corrective measure, not a primary nutritional improvement strategy. * **Option D:** While this is a standard food safety and storage practice to prevent fungal growth (like *Aspergillus flavus* which produces Aflatoxin), it is a **logistical/hygienic requirement** rather than a specific suggestion to "improve the nutritional value" of the meal itself. **3. High-Yield NEET-PG Pearls:** * **MDM Norms (Primary):** 450 Calories and 12g Protein. * **MDM Norms (Upper Primary):** 700 Calories and 20g Protein. * **Fortification:** The MDM scheme now emphasizes the use of **double-fortified salt** (Iron + Iodine) and fortified oils/rice to combat "hidden hunger." * **Vitamin C:** Sprouting is the most cost-effective way to introduce Vitamin C into a cereal-pulse-based diet.

Question 429: What is the recommended concentration of anhydrous glucose in ORS for reduced osmolarity?

A. 26 gm/l
B. 2.9 gm/L
C. 13.5 gm/L (Correct Answer)
D. 1.5 gm/L

Explanation: ### Explanation The correct answer is **13.5 gm/L**. **1. Underlying Medical Concept:** The World Health Organization (WHO) and UNICEF shifted from the standard ORS to **Low Osmolarity ORS** to reduce the risk of hypernatremia and decrease the need for unscheduled IV fluids. The physiological basis of ORS is the **sodium-glucose cotransport** mechanism in the small intestine. For optimal absorption, glucose and sodium must be present in a specific ratio. In the reduced osmolarity formulation, the concentration of **Anhydrous Glucose is 13.5 gm/L**, which contributes 75 mmol/L to the total osmolarity (245 mOsm/L). **2. Analysis of Options:** * **Option A (26 gm/L):** This was the glucose concentration in the **Old (Standard) WHO ORS**. It resulted in a higher total osmolarity (311 mOsm/L), which sometimes led to osmotic diarrhea. * **Option B (2.9 gm/L):** This is the concentration of **Trisodium Citrate** in the current low osmolarity ORS. * **Option C (13.5 gm/L):** Correct. This is the anhydrous glucose concentration for the current WHO-recommended formula. * **Option D (1.5 gm/L):** This is the concentration of **Potassium Chloride** in the current ORS formula. **3. High-Yield Clinical Pearls for NEET-PG:** * **Total Osmolarity of New ORS:** 245 mOsm/L (Sodium: 75, Chloride: 65, Glucose: 75, Potassium: 20, Citrate: 10). * **Sodium Concentration:** Reduced from 90 mEq/L (Old) to **75 mEq/L** (New). * **Benefits of Low Osmolarity ORS:** Reduces stool output by 20%, reduces vomiting by 30%, and reduces the need for IV fluids by 33%. * **Re-Somal:** A special ORS for severely malnourished children (SAM) with lower sodium (45 mmol/L) and higher potassium (40 mmol/L).

Question 430: Which of the following is NOT an essential fatty acid?

A. Linoleic acid
B. Linolenic acid
C. Arachidonic acid
D. Glutamic acid (Correct Answer)

Explanation: **Explanation** The correct answer is **Glutamic acid** because it is a **non-essential amino acid**, not a fatty acid. **Understanding Essential Fatty Acids (EFAs)** Essential fatty acids are polyunsaturated fatty acids (PUFAs) that cannot be synthesized by the human body and must be obtained through the diet. They are crucial for cell membrane structure, prostaglandin synthesis, and brain function. * **Why Glutamic acid is the correct choice:** It is an amino acid used in the biosynthesis of proteins. Since the question asks for what is *not* a fatty acid, this is the outlier. * **Linoleic acid (Omega-6):** This is a primary EFA. It is found in vegetable oils (sunflower, corn) and serves as a precursor to arachidonic acid. * **Linolenic acid (Omega-3):** Specifically Alpha-linolenic acid (ALA), this is a primary EFA found in soy, walnuts, and flaxseed. It is vital for cardiovascular health. * **Arachidonic acid:** While often synthesized from linoleic acid, it is considered "semi-essential." If linoleic acid is deficient in the diet, arachidonic acid becomes essential. **NEET-PG High-Yield Pearls:** 1. **The "Big Two":** Strictly speaking, only Linoleic and Linolenic acids are true EFAs. 2. **EFA Deficiency:** Clinically manifests as **Phrynoderma** (follicular hyperkeratosis or "toad skin"), poor wound healing, and growth retardation. 3. **P/S Ratio:** In a healthy diet, the ratio of Polyunsaturated to Saturated fats (P/S ratio) should be **0.8 to 1.0**. 4. **Energy Value:** Fats provide **9 kcal/g**, the highest energy density of all macronutrients.

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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