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Principles of Diet Therapy & Clinical Nutrition (Nutrition & Dietetics) Solved Questions & Notes (2026) - Apex Rankers

Medical & Health Sciences > Nutrition & Dietetics > Principles of Diet Therapy & Clinical Nutrition

70 Total Solved Questions
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Principles of Diet Therapy & Clinical Nutrition

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Q. 1 Dietetics
Difficulty: Medium (1 Mark)
In medical nutrition therapy for pre-dialysis Chronic Kidney Disease (CKD Stages 3-4), what is the recommended daily dietary protein intake to slow progression?
A
0.6 to 0.8 g/kg body weight/day
✓ Correct
B
1.2 to 1.5 g/kg body weight/day
C
2.0 to 2.5 g/kg body weight/day
D
Unlimited protein intake
💡 Step-by-Step Explanation & Concept Rationale
KDIGO guidelines recommend restricting protein to 0.6-0.8 g/kg/day in non-dialysis CKD to diminish intraglomerular pressure and uremic toxin generation. Once on hemodialysis, protein is increased to 1.2 g/kg/day.
Q. 2 Dietetics
Difficulty: Easy (1 Mark)
Which medical diet is universally mandated for patients with Celiac Disease (Gluten-Sensitive Enteropathy)?
A
Low-fat, low-fiber diet
B
Strict life-long gluten-free diet (eliminating Wheat, Barley, Rye, and related grains)
✓ Correct
C
Low-purine diet
D
High-protein, ketogenic diet
💡 Step-by-Step Explanation & Concept Rationale
Celiac disease is an autoimmune enteropathy triggered by gliadin peptides in gluten. Complete lifetime elimination of wheat, barley, rye, and triticale is required to restore intestinal villous architecture.
Q. 3 Dietetics
Difficulty: Easy (1 Mark)
The Dietary Approaches to Stop Hypertension (DASH) diet is clinically proven to lower blood pressure primarily because it is rich in:
A
Potassium, Calcium, Magnesium, and dietary fiber with reduced sodium and saturated fat
✓ Correct
B
Sodium chloride and animal fats
C
Refined carbohydrates and simple sugars
D
Protein and iron supplements
💡 Step-by-Step Explanation & Concept Rationale
The DASH diet emphasizes fruits, vegetables, low-fat dairy, whole grains, nuts, and fish, delivering high levels of potassium, magnesium, calcium, and fiber while restricting sodium (< 2300 mg/day).
Q. 4 Dietetics
Difficulty: Hard (1 Mark)
In a hospitalized patient with acute decompensated liver cirrhosis and hepatic encephalopathy, which dietary amino acid strategy is beneficial?
A
Enriching the diet with Branched-Chain Amino Acids (BCAA) while limiting Aromatic Amino Acids (AAA)
✓ Correct
B
Total protein starvation for two weeks
C
Giving high doses of phenylalanine and tryptophan
D
Restricting fluid to 200 mL/day
💡 Step-by-Step Explanation & Concept Rationale
In hepatic failure, the plasma BCAA-to-AAA ratio declines. BCAAs (leucine, isoleucine, valine) compete with AAAs (phenylalanine, tyrosine, tryptophan) across the blood-brain barrier, reducing false neurotransmitter synthesis.
Q. 5 Dietetics
Difficulty: Medium (1 Mark)
What is the hallmark, life-threatening biochemical abnormality observed in Refeeding Syndrome when initiating nutrition in severely malnourished patients?
A
Severe Hypophosphatemia
✓ Correct
B
Severe Hyperkalemia
C
Hypernatremia
D
Hypercalcemia
💡 Step-by-Step Explanation & Concept Rationale
Carbohydrate reintroduction drives insulin release, triggering rapid cellular uptake of phosphate, potassium, and magnesium. Precipitous hypophosphatemia causes cardiac arrest, respiratory failure, and death.
Q. 6 Dietetics
Difficulty: Easy (1 Mark)
For a patient with acute gouty arthritis and hyperuricemia, which foods should be strictly restricted?
A
Organ meats (liver, kidneys), shellfish, anchovies, beer, and high-fructose corn syrup
✓ Correct
B
Skim milk and low-fat yogurt
C
Cherries and fresh citrus fruits
D
Whole-wheat breads and oats
💡 Step-by-Step Explanation & Concept Rationale
Purines are metabolized into uric acid. High-purine foods (organ meats, small fish, meat extracts) and alcohol/fructose (which accelerates ATP degradation to AMP) drive hyperuricemia and crystal precipitation.
Q. 7 Dietetics
Difficulty: Easy (1 Mark)
Infants diagnosed with Phenylketonuria (PKU) require complete avoidance of which synthetic intense sweetener?
A
Sucralose
B
Aspartame
✓ Correct
C
Saccharin
D
Stevia
💡 Step-by-Step Explanation & Concept Rationale
Aspartame is a methyl ester of the aspartic acid/phenylalanine dipeptide. In the GI tract, it hydrolyzes to liberate free phenylalanine, which is toxic to the brain in PKU patients.
Q. 8 Dietetics
Difficulty: Easy (1 Mark)
What is the recommended dietary management for an acute flare of Gastroesophageal Reflux Disease (GERD)?
A
Small frequent meals, avoidance of high-fat foods, chocolate, caffeine, mint, and remaining upright for 2-3 hours post-meal
✓ Correct
B
Large meals before bedtime
C
Drinking orange juice and tomato soup before sleeping
D
High-fat dairy intake
💡 Step-by-Step Explanation & Concept Rationale
Fat, peppermint, caffeine, and chocolate relax the lower esophageal sphincter (LES). Recumbency post-meal facilitates acid reflux; elevating the head of the bed and small meals mitigate reflux.
Q. 9 Dietetics
Difficulty: Easy (1 Mark)
In managing conscious diabetic patients experiencing acute hypoglycemia (blood glucose < 70 mg/dL), the 'Rule of 15' directs the patient to:
A
Consume 15 grams of fast-acting simple carbohydrates, wait 15 minutes, and recheck blood glucose
✓ Correct
B
Inject 15 units of regular insulin immediately
C
Drink 15 glasses of cold water
D
Fast for 15 hours
💡 Step-by-Step Explanation & Concept Rationale
The 15-15 rule: Administer 15g of fast-acting glucose (e.g., 1/2 cup fruit juice, 3-4 glucose tablets), wait 15 minutes, and re-test. If still < 70 mg/dL, repeat the 15g treatment.
Q. 10 Dietetics
Difficulty: Medium (1 Mark)
In patients with acute exacerbations of Inflammatory Bowel Disease (Crohn's disease / Ulcerative Colitis), which dietary modification is indicated?
A
Low-residue / low-fiber diet
✓ Correct
B
High-roughage raw vegetable diet
C
High-fat ketogenic diet
D
Unpasteurized whole milk diet
💡 Step-by-Step Explanation & Concept Rationale
A low-residue/low-fiber diet reduces mechanical irritation of the inflamed bowel wall, minimizes fecal volume, and relieves abdominal cramping and stricture obstruction during acute flares.
Q. 11 Dietetics
Difficulty: Easy (1 Mark)
What is the daily sodium restriction target commonly recommended by the American Heart Association for patients with Stage 2 Hypertension or Congestive Heart Failure?
A
Less than 1,500 to 2,000 mg of sodium per day
✓ Correct
B
5,000 to 6,000 mg of sodium per day
C
Zero sodium per day
D
10,000 mg of sodium per day
💡 Step-by-Step Explanation & Concept Rationale
AHA guidelines recommend restricting sodium intake to < 2,300 mg/day for the general public and ideally < 1,500 mg/day in hypertensive individuals and congestive heart failure patients to prevent fluid overload.
Q. 12 Dietetics
Difficulty: Medium (1 Mark)
Enteral tube feeding is contraindicated in which of the following clinical conditions?
A
Complete mechanical intestinal obstruction or paralytic ileus
✓ Correct
B
Facial fracture with intact gastrointestinal tract
C
Mild stroke with dysphagia
D
Comatose patient with normal gut motility
💡 Step-by-Step Explanation & Concept Rationale
When the gastrointestinal tract is non-functional, obstructed, infarcted, or suffering intractable vomiting/paralytic ileus, enteral nutrition is contraindicated and total parenteral nutrition (TPN) is required.
Q. 13 Dietetics
Difficulty: Medium (1 Mark)
In Chronic Pancreatitis with exocrine pancreatic insufficiency and steatorrhea, what is the primary medical nutrition intervention?
A
Pancreatic Enzyme Replacement Therapy (PERT) taken with meals along with moderate fat and fat-soluble vitamin supplementation
✓ Correct
B
High-fat diet without enzymes
C
Protein-free diet
D
Complete avoidance of water
💡 Step-by-Step Explanation & Concept Rationale
Pancreatic exocrine insufficiency leads to maldigestion of triglycerides. Enteric-coated pancreatic enzyme microtablets (lipase/protease/amylase) taken with meals correct fat malabsorption and steatorrhea.
Q. 14 Dietetics
Difficulty: Easy (1 Mark)
Which dietary component should be restricted in patients with end-stage renal disease (ESRD) to prevent cardiac arrest and life-threatening arrhythmias?
A
Potassium
✓ Correct
B
Iron
C
Vitamin C
D
Zinc
💡 Step-by-Step Explanation & Concept Rationale
Failing kidneys cannot excrete potassium. Hyperkalemia (> 5.5-6.0 mEq/L) can cause fatal ventricular fibrillation; hence high-potassium foods (bananas, potatoes, tomatoes, dates) must be restricted.
Q. 15 Dietetics
Difficulty: Hard (1 Mark)
In patients with calcium oxalate nephrolithiasis (kidney stones), which dietary practice is recommended?
A
Adequate dietary calcium intake with meals (to bind oxalate in the gut) and avoidance of high-oxalate foods (spinach, rhubarb, nuts)
✓ Correct
B
Complete elimination of dietary calcium
C
Severely restricting water intake
D
High doses of Vitamin C supplements
💡 Step-by-Step Explanation & Concept Rationale
Restricting dietary calcium increases free gut oxalate absorption, exacerbating urinary stone formation. Maintaining normal dietary calcium allows it to bind oxalate in the intestinal lumen to form unabsorbable feces complexes.
Q. 16 Dietetics
Difficulty: Easy (1 Mark)
Which of the following is considered a 'monounsaturated fatty acid' (MUFA) that benefits cardiovascular health by lowering LDL while maintaining HDL?
A
Oleic acid (found in Olive Oil)
✓ Correct
B
Palmitic acid
C
Stearic acid
D
Lauric acid
💡 Step-by-Step Explanation & Concept Rationale
Oleic acid (18:1 n-9) is the predominant monounsaturated fatty acid in olive oil, canola oil, and avocados, improving the lipid profile without lowering atheroprotective HDL.
Q. 17 Dietetics
Difficulty: Medium (1 Mark)
In severe burn injuries (> 30% TBSA), the patient's resting metabolic rate increases up to 100%. What is the priority nutritional goal?
A
High-calorie, high-protein diet (1.5 to 2.0 g/kg/day) to prevent catabolic wasting and support re-epithelialization
✓ Correct
B
Low-protein diet to spare renal function
C
Fasting for the first week
D
Clear fluids only
💡 Step-by-Step Explanation & Concept Rationale
Burn injuries induce profound hypermetabolism, proteolysis, and urinary nitrogen loss. Providing early enteral nutrition with high protein (1.5-2.0 g/kg) and glutamine/zinc/vitamin C is vital for wound healing.
Q. 18 Dietetics
Difficulty: Easy (1 Mark)
What is the recommended maximum intake of saturated fat for individuals aiming to reduce risk of coronary heart disease according to clinical guidelines?
A
Less than 7% to 10% of total daily energy intake
✓ Correct
B
At least 30% of total daily energy intake
C
50% of total calories
D
No limit
💡 Step-by-Step Explanation & Concept Rationale
The American Heart Association and WHO recommend restricting saturated fatty acids to < 7-10% of daily calories, substituting them with polyunsaturated and monounsaturated fatty acids.
Q. 19 Dietetics
Difficulty: Medium (1 Mark)
In cystic fibrosis, what dietary intervention is essential to address pancreatic duct blockage and nutrient malabsorption?
A
High-calorie, high-fat, high-salt diet accompanied by exogenous pancreatic enzyme replacement with all meals
✓ Correct
B
Low-fat, low-salt diet
C
Ketogenic starvation diet
D
Low-protein vegan diet
💡 Step-by-Step Explanation & Concept Rationale
Cystic fibrosis patients lose substantial sodium in sweat and suffer pancreatic exocrine insufficiency; they require a hypercaloric (110-200% RDA), high-fat diet with extra salt and enzyme supplements.
Q. 20 Dietetics
Difficulty: Medium (1 Mark)
Which laboratory parameter is widely used in clinical nutrition to reflect recent protein-energy status changes over a 2-3 day window due to its short half-life?
A
Serum Prealbumin (Transthyretin)
✓ Correct
B
Serum Albumin
C
Serum Ferritin
D
Hemoglobin A1c
💡 Step-by-Step Explanation & Concept Rationale
Prealbumin (transthyretin) has a short half-life of ~2 days (compared to 20 days for albumin), making it a sensitive indicator of acute nutritional recovery or acute inflammatory/catabolic shifts.
Q. 21 Nutrition & Dietetics
Difficulty: EASY (1 Mark)
Deficiency of Vitamin C (Ascorbic acid) leads to which classic nutritional deficiency disease?
A
Rickets
B
Scurvy
✓ Correct
C
Pellagra
D
Beri-beri
💡 Step-by-Step Explanation & Concept Rationale
Vitamin C is essential for collagen synthesis; deficiency causes scurvy characterized by bleeding gums, skin hemorrhages, and impaired wound healing.
Q. 22 Nutrition & Dietetics
Difficulty: EASY (1 Mark)
In nutritional biochemistry #6: What is the primary storage polysaccharide of glucose in the human liver and skeletal muscle?
A
Starch
B
Glycogen
✓ Correct
C
Cellulose
D
Dextrin
💡 Step-by-Step Explanation & Concept Rationale
Glycogen is a branched polymer of glucose serving as the primary short-term energy reserve in animals.
Q. 23 Nutrition & Dietetics
Difficulty: EASY (1 Mark)
In nutritional biochemistry #10: What is the primary storage polysaccharide of glucose in the human liver and skeletal muscle?
A
Starch
B
Glycogen
✓ Correct
C
Cellulose
D
Dextrin
💡 Step-by-Step Explanation & Concept Rationale
Glycogen is a branched polymer of glucose serving as the primary short-term energy reserve in animals.
Q. 24 Nutrition & Dietetics
Difficulty: EASY (1 Mark)
In nutritional biochemistry #14: What is the primary storage polysaccharide of glucose in the human liver and skeletal muscle?
A
Starch
B
Glycogen
✓ Correct
C
Cellulose
D
Dextrin
💡 Step-by-Step Explanation & Concept Rationale
Glycogen is a branched polymer of glucose serving as the primary short-term energy reserve in animals.
Q. 25 Nutrition & Dietetics
Difficulty: EASY (1 Mark)
In nutritional biochemistry #18: What is the primary storage polysaccharide of glucose in the human liver and skeletal muscle?
A
Starch
B
Glycogen
✓ Correct
C
Cellulose
D
Dextrin
💡 Step-by-Step Explanation & Concept Rationale
Glycogen is a branched polymer of glucose serving as the primary short-term energy reserve in animals.
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