Dietary Guidelines and Recommendations — MCQs
A child was fed on a staple diet of maize for a long time. Which of the following vitamin may get deficient in his body?
30 years old came with complaints of easy fatigability, exertional dyspnea, and weight loss. She also complains of frequent falls. physical examination revealed there was a bilateral decrease in vibration sense. Her hemoglobin levels were 8.2g%. She was treated with folate. Her anemia improved but neurological symptoms worsened. Which of the following is the most probable reason for her condition?
Additional protein and calorie requirements in pregnancy are?
A 2-year-old boy weighing 12 kg is diagnosed with vitamin A deficiency. What is the recommended oral dose of vitamin A for him?
What is the recommended dietary allowance of iron during pregnancy?
Maximum concentration of vitamin A is found in which organ?
Which of the following statements about folic acid and vitamin B12 is NOT true?
NPCDCS covers all except:
Concentration of diethylcarbomazine in DEC medicated salt in endemic filariasis is
Which is not a dietary fiber ?
Dietary Guidelines and Recommendations Indian Medical PG Practice Questions and MCQs
Question 1: A child was fed on a staple diet of maize for a long time. Which of the following vitamin may get deficient in his body?
- A. Thiamine (Vitamin B1)
- B. Vitamin B6 (Pyridoxine)
- C. Cobalamin (Vitamin B12)
- D. Niacin (Vitamin B3) (Correct Answer)
Explanation: ***Niacin (Vitamin B3)*** - Maize is deficient in tryptophan (an amino acid that can be converted to **niacin**) and contains niacin in a bound form (**niacytin**) that is not bioavailable. - A staple diet of maize without adequate supplementation can lead to **pellagra**, characterized by the classic triad of dermatitis, diarrhea, and dementia (3 D's). - This is particularly common in populations relying heavily on untreated maize as a staple food. *Thiamine (Vitamin B1)* - While polishing rice can remove thiamine, maize itself is not primarily associated with **thiamine deficiency** as a staple. - **Beriberi** (thiamine deficiency) presents with neurological and cardiovascular symptoms (wet and dry beriberi), distinct from pellagra. *Vitamin B6 (Pyridoxine)* - Deficiency of **pyridoxine** is uncommon with maize-based diets unless there are other contributing factors like drug interactions (e.g., isoniazid). - Symptoms include peripheral neuropathy, seborrheic dermatitis, and sideroblastic anemia, which are not directly linked to a maize staple diet. *Cobalamin (Vitamin B12)* - **Vitamin B12** is found primarily in animal products, so a vegetarian or vegan diet poses a risk for deficiency, not specifically a maize-based diet. - Deficiency leads to megaloblastic anemia and neurological damage (subacute combined degeneration), unrelated to maize's nutritional profile.
Question 2: 30 years old came with complaints of easy fatigability, exertional dyspnea, and weight loss. She also complains of frequent falls. physical examination revealed there was a bilateral decrease in vibration sense. Her hemoglobin levels were 8.2g%. She was treated with folate. Her anemia improved but neurological symptoms worsened. Which of the following is the most probable reason for her condition?
- A. Folate therapy caused rapid use of Vit B12 stores aggravating symptoms (Correct Answer)
- B. Vitamin B6 deficiency unmasked by folate treatment.
- C. Impaired folate metabolism in the central nervous system.
- D. Malabsorption of folate due to gastrointestinal issues.
Explanation: ***Folate therapy caused rapid use of Vit B12 stores aggravating symptoms*** - This patient likely has **Vitamin B12 deficiency**, which presents with **macrocytic anemia** and **neurological symptoms** like decreased vibration sense and frequent falls [1]. - While folate improves the anemia by allowing erythrocyte maturation, it can **deplete existing B12 stores** and worsen neurological symptoms in the presence of an underlying B12 deficiency [1]. *Vitamin B6 deficiency unmasked by folate treatment.* - **Vitamin B6 deficiency** can cause **microcytic anemia** and neuropathies, but it is not typically associated with the macrocytic anemia and specific neurological deterioration seen here after folate treatment. - Folate treatment itself does not directly unmask or worsen B6 deficiency in this manner. *Impaired folate metabolism in the central nervous system.* - Impaired folate metabolism in the CNS is rare and usually associated with specific genetic disorders or malformations, which does not explain the initial **macrocytic anemia** or the paradoxical worsening of neurological symptoms with folate. - The improvement in anemia with folate suggests that the central problem was not primarily impaired folate metabolism itself. *Malabsorption of folate due to gastrointestinal issues.* - If **folate malabsorption** was the primary issue, folate supplementation would not have improved the anemia, contrary to what is described in the case. - This option does not explain the worsening neurological symptoms after folate treatment.
Question 3: Additional protein and calorie requirements in pregnancy are?
- A. 60 kcal/day calorie, 12 g/day protein
- B. 120 kcal/day calorie, 25 g/day protein
- C. 450 kcal/day calorie, 45 g/day protein
- D. 300 kcal/day calorie, 25 g/day protein (Correct Answer)
Explanation: ***300 kcal/day calorie, 25 g/day protein*** - This option correctly states the typical **additional daily calorie and protein requirements** to support fetal growth and maternal physiological changes during pregnancy, especially during the second and third trimesters. - The **300 kcal/day** accounts for the increased metabolic rate and energy needed for tissue synthesis, while **25 g/day of protein** is crucial for fetal tissue development and maternal blood volume expansion. *60 kcal/day calorie, 12 g/day protein* - These values are **too low** to meet the significantly increased metabolic and growth demands of pregnancy. - Insufficient calorie and protein intake can lead to **poor fetal growth** and adverse pregnancy outcomes. *120 kcal/day calorie, 25 g/day protein* - While the protein requirement of **25 g/day** is appropriate, the **120 kcal/day** increase is still too low to support the full physiological demands of pregnancy. - This would not adequately cover the energy cost of tissue accretion and increased basal metabolic rate. *450 kcal/day calorie, 45 g/day protein* - These values represent an **excessive increase** in both calorie and protein intake for normal pregnancy. - Such high additional intake is generally **not recommended** for the average pregnant woman and could potentially contribute to excessive maternal weight gain or other complications.
Question 4: A 2-year-old boy weighing 12 kg is diagnosed with vitamin A deficiency. What is the recommended oral dose of vitamin A for him?
- A. 200,000 I.U. (Correct Answer)
- B. 50,000 I.U.
- C. 100,000 I.U.
- D. 150,000 I.U.
Explanation: ***200,000 I.U.*** - According to **WHO guidelines**, for children aged **12 months and older** with vitamin A deficiency, the recommended oral dose is **200,000 I.U.** - This dose is given immediately upon diagnosis, repeated the next day, and a third dose is given 2-4 weeks later. - Since this child is **2 years old**, he falls into the ≥12 months category requiring 200,000 I.U. *100,000 I.U.* - A dose of **100,000 I.U.** is recommended for infants aged **6-11 months** with vitamin A deficiency. - This child is 2 years old, making 100,000 I.U. an insufficient dose for his age group. *50,000 I.U.* - A dose of **50,000 I.U.** is recommended for infants **younger than 6 months** diagnosed with vitamin A deficiency. - This dose is too low for a 2-year-old child. *150,000 I.U.* - **150,000 I.U.** is not a standard WHO-recommended dose for vitamin A deficiency treatment in any pediatric age group. - This is an incorrect dosing option.
Question 5: What is the recommended dietary allowance of iron during pregnancy?
- A. 15 mg of iron
- B. 27 mg of iron (Correct Answer)
- C. 35 mg of iron
- D. 18 mg of iron
Explanation: ***27 mg of iron*** - The **recommended dietary allowance (RDA)** for iron during pregnancy is specifically increased to **27 mg per day** to meet the higher demands of **maternal red blood cell mass expansion** and fetal development. - This increased intake helps prevent **iron-deficiency anemia**, which is common in pregnancy due to the significant increase in **blood volume** and iron transfer to the fetus. *35 mg of iron* - While iron requirements are higher in pregnancy, **35 mg** is generally higher than the widely accepted RDA and might be a dose considered for **iron supplementation** in cases of confirmed deficiency, rather than a general dietary recommendation. - Exceeding the RDA significantly without medical supervision could lead to **iron toxicity** or side effects like constipation and nausea. *15 mg of iron* - **15 mg** is below the recommended daily intake for pregnant women and would be insufficient to meet the increased physiological demands for iron during pregnancy. - This intake level is similar to the RDA for **non-pregnant adult women**, failing to account for the substantial iron needs for **fetal growth and placental development**. *18 mg of iron* - **18 mg** closely matches the RDA for **non-pregnant adult women** and is insufficient for the unique physiological requirements of pregnancy. - This amount would likely lead to a **negative iron balance** and increase the risk of developing **iron-deficiency anemia** as pregnancy progresses.
Question 6: Maximum concentration of vitamin A is found in which organ?
- A. Liver (Correct Answer)
- B. Kidney
- C. Lung
- D. Heart
Explanation: ***Liver*** - The **liver** is the primary organ for **storage of vitamin A** (retinyl esters), accounting for 90% of the body's total vitamin A content. - **Hepatic stellate cells** within the liver are specialized for storing the majority of this fat-soluble vitamin. *Kidney* - The **kidney** plays a role in **vitamin D metabolism** and excretion, but not significant vitamin A storage. - While it helps regulate blood levels of various substances, it does not accumulate large quantities of vitamin A. *Lung* - The **lung** does not serve as a major storage site for **vitamin A**. - Its primary functions are related to **gas exchange**, not nutrient storage. *Heart* - The **heart** is responsible for **pumping blood** throughout the body and has minimal involvement in vitamin A storage. - It utilizes certain vitamins for its metabolic processes but does not act as a primary reservoir.
Question 7: Which of the following statements about folic acid and vitamin B12 is NOT true?
- A. Vegetarians have vitamin B12 deficit
- B. Deficiency of both causes megaloblastic anemia
- C. Recommended daily allowances for Folic acid is 1000 micro grams (Correct Answer)
- D. Both are required for DNA synthesis
Explanation: ***Recommended daily allowances for Folic acid is 1000 micro grams*** - The **recommended daily allowance (RDA)** for folic acid in adults is typically around **400 micrograms (mcg)**, not 1000 mcg. Pregnant women may require a higher intake of 600 mcg. - An intake of 1000 mcg (1 mg) is closer to the **tolerable upper intake level (UL)** for folic acid, above which there is a risk of masking a vitamin B12 deficiency. *Both are required for DNA synthesis* - Both **folic acid** (as tetrahydrofolate) and **vitamin B12** (as methylcobalamin) are essential coenzymes in the **one-carbon metabolism pathway**. - This pathway is crucial for the synthesis of **purines and pyrimidines**, which are the building blocks of **DNA**. *Vegetarians have vitamin B12 deficit* - **Vitamin B12 (cobalamin)** is found almost exclusively in **animal products** (meat, fish, eggs, dairy). - Therefore, individuals following a strict **vegetarian or vegan diet** are at a significant risk of developing a vitamin B12 deficiency if they do not consume fortified foods or supplements. *Deficiency of both causes megaloblastic anemia* - Both **folic acid deficiency** and **vitamin B12 deficiency** impair DNA synthesis, which leads to arrested maturation of red blood cell precursors in the bone marrow. - This results in the production of **large, immature red blood cells** known as **megaloblasts**, clinically manifesting as **megaloblastic anemia**.
Question 8: NPCDCS covers all except:
- A. Depression (Correct Answer)
- B. Diabetes
- C. Hypertension
- D. Stroke
Explanation: ***Depression*** - The **National Programme for Prevention and Control of Cancer, Diabetes, Cardiovascular Diseases and Stroke (NPCDCS)** specifically focuses on the prevention and control of non-communicable diseases such as **cancer, diabetes, cardiovascular diseases (including hypertension and myocardial infarction), and stroke**. - While depression is a significant non-communicable disease, it is not explicitly covered under the primary scope of the NPCDCS, which has a distinct focus on the four mentioned disease groups. *Diabetes* - **Diabetes** is one of the foundational non-communicable diseases directly addressed by the NPCDCS, with specific initiatives for its prevention, early detection, and management. - The program aims to reduce the burden of diabetes through various health promotion and healthcare delivery strategies. *Hypertension* - **Hypertension** is a major risk factor for cardiovascular diseases and stroke, and its control is a key component of the NPCDCS. - The program includes screening, diagnosis, and management protocols for hypertension as part of its strategy to reduce cardiovascular morbidity and mortality. *Stroke* - **Stroke** is explicitly part of the NPCDCS mandate, as indicated by its inclusion in the program's full name. - The program addresses stroke through prevention initiatives, early recognition campaigns, and strengthening healthcare services for acute and rehabilitation care.
Question 9: Concentration of diethylcarbomazine in DEC medicated salt in endemic filariasis is
- A. 2-4 gm/kg (Correct Answer)
- B. 3-6 gm/kg
- C. 5-10 gm/kg
- D. 10-15 gm/kg
Explanation: ***2-4 gm/kg*** - The standard concentration of **diethylcarbamazine (DEC)** in medicated salt for endemic filariasis control programs is **2-4 grams per kilogram of salt**. - This concentration is designed to provide an adequate prophylactic dose of DEC to the population through regular salt consumption, effectively reducing **microfilaria** prevalence and transmission. *3-6 gm/kg* - This concentration is generally **higher** than the recommended dose for mass drug administration using medicated salt in endemic areas. - Using a higher concentration could potentially increase the risk of **adverse effects** without significantly improving efficacy, especially if daily salt intake varies widely. *5-10 gm/kg* - Such a high concentration of **DEC** in salt would be considered excessive for general population use in filariasis control. - It could lead to a greater incidence of **side effects** like fever, headache, and nausea, which might discourage compliance with the program. *10-15 gm/kg* - These concentrations are far beyond the recommended therapeutic or prophylactic range for **DEC medicated salt** campaigns. - Administering **DEC** at such high levels through salt would likely cause significant and widespread adverse reactions, making the intervention impractical and unsafe.
Question 10: Which is not a dietary fiber ?
- A. Lignin
- B. Pectin
- C. Cellulose
- D. Lactulose (Correct Answer)
Explanation: ***Lactulose*** - **Lactulose is NOT a dietary fiber** - it is a synthetic disaccharide used pharmaceutically as an osmotic laxative and for treating hepatic encephalopathy. - Unlike true dietary fibers, lactulose is a manufactured drug, not a naturally occurring food component. - While it is fermented by colonic bacteria (similar to fiber), it does not meet the definition of dietary fiber. *Lignin* - Lignin is a complex aromatic polymer that provides structural support to plant cell walls. - It is classified as a non-polysaccharide dietary fiber that is largely indigestible by human enzymes. - Contributes to fecal bulk and is considered an insoluble fiber. *Pectin* - Pectin is a soluble dietary fiber found naturally in fruits, particularly in apple peels and citrus fruits. - Forms a gel when mixed with water, slowing gastric emptying and aiding digestion. - Beneficial for gut health and blood glucose regulation. *Cellulose* - Cellulose is the most abundant dietary fiber and a major structural component of plant cell walls. - An insoluble fiber composed of β-1,4-linked glucose polymers that cannot be digested by human enzymes. - Contributes to stool bulk and promotes regular bowel movements.
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