Q. 1
Pharmacy
Difficulty: Easy
(1 Mark)
According to EU GMP / WHO sterile manufacturing guidelines, what cleanroom grade is required for high-risk aseptic operations such as filling sterile ampoules and compounding cytotoxic drugs?
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Step-by-Step Explanation & Concept Rationale
Grade A represents the local zone for high-risk operations (e.g., aseptic filling, stoppering, open ampoules) with laminar airflow (0.45 m/s +/- 20%) and maximum 3,520 particles/m3 (>= 0.5 um), corresponding to ISO Class 5.
Q. 2
Pharmacy
Difficulty: Easy
(1 Mark)
What is the certified particulate filtration efficiency and minimum particle size threshold for standard High-Efficiency Particulate Air (HEPA) filters used in pharmaceutical cleanrooms?
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Step-by-Step Explanation & Concept Rationale
By standard specification, HEPA filters must retain at least 99.97% of particles having a diameter of 0.3 um (the most penetrating particle size or MPPS) from the air stream.
Q. 3
Pharmacy
Difficulty: Easy
(1 Mark)
What are the standard operational parameters for moist heat sterilization using an autoclave under steam pressure?
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Step-by-Step Explanation & Concept Rationale
Standard pharmacopeial autoclaving relies on saturated steam under pressure at 121°C (250°F) for at least 15-20 minutes, which coagulates and denatures essential microbial proteins and destroys bacterial spores.
Q. 4
Pharmacy
Difficulty: Medium
(1 Mark)
Which biological indicator organism is officially specified to validate moist heat (autoclave) sterilization cycles?
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Step-by-Step Explanation & Concept Rationale
Geobacillus stearothermophilus (formerly Bacillus stearothermophilus) spores possess extreme thermal resistance to moist steam heat, making them the standard biological indicator for autoclaving cycles.
Q. 5
Pharmacy
Difficulty: Medium
(1 Mark)
Which biological indicator organism is used for dry heat sterilization validation?
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Step-by-Step Explanation & Concept Rationale
Bacillus atrophaeus spores demonstrate high resistance to dry heat and ethylene oxide gas sterilization, serving as the official pharmacopeial indicator for dry heat ovens and EtO chambers.
Q. 6
Pharmacy
Difficulty: Medium
(1 Mark)
What temperature and duration are required to achieve complete depyrogenation of glassware and metal containers using dry heat?
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Step-by-Step Explanation & Concept Rationale
Bacterial endotoxins (lipopolysaccharides) are thermostable and survive standard autoclaving. Depyrogenation requires intense dry heat destruction: typically 250°C for >= 30 minutes, or 200°C for >= 60 minutes.
Q. 7
Pharmacy
Difficulty: Easy
(1 Mark)
What reagent derived from the horseshoe crab (Limulus polyphemus) is standardly used in the pharmacopeial Bacterial Endotoxins Test (BET)?
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Step-by-Step Explanation & Concept Rationale
The LAL test uses an aqueous extract of amebocytes from the horseshoe crab. Bacterial endotoxins trigger an enzyme cascade in the lysate, resulting in gel clot formation or chromogenic color change.
Q. 8
Pharmacy
Difficulty: Hard
(1 Mark)
According to the United States Pharmacopeia (USP) and British Pharmacopoeia (BP), Water for Injection (WFI) must meet which endotoxin limit?
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Step-by-Step Explanation & Concept Rationale
Both USP and BP mandate that Water for Injection (WFI) must contain no more than 0.25 EU/mL of bacterial endotoxins to prevent febrile pyrogenic reactions upon IV administration.
Q. 9
Pharmacy
Difficulty: Hard
(1 Mark)
In a hospital cleanroom suite, what type of Biological Safety Cabinet (BSC) is required for compounding hazardous cytotoxic chemotherapy drugs?
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Step-by-Step Explanation & Concept Rationale
Cytotoxic antineoplastic drugs must never be compounded in horizontal laminar flow hoods (which blow toxins into the operator's face). They must be reconstituted in Class II Type B2 cabinets (total external exhaust through HEPA filters) or Class II Type A2 vented externally, under negative air pressure.
Q. 10
Pharmacy
Difficulty: Medium
(1 Mark)
What mechanical containment device connects vials, syringes, and IV infusion bags to prevent aerosolization and environmental leakage of hazardous drugs during chemotherapy preparation?
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Step-by-Step Explanation & Concept Rationale
A Closed System Drug-Transfer Device (CSTD) mechanically prohibits the transfer of environmental contaminants into the system and prevents hazardous drug aerosol or liquid leakages outside the system.
Q. 11
Pharmacy
Difficulty: Medium
(1 Mark)
In Total Parenteral Nutrition (TPN) compounding, which two mineral ions are most prone to form life-threatening, insoluble crystalline precipitates when mixed improperly?
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Step-by-Step Explanation & Concept Rationale
Calcium and inorganic phosphate readily react to form insoluble calcium phosphate (CaHPO4), which can cause pulmonary microvascular emboli and sudden death. Order of addition, pH, amino acid concentration, and calcium salt type (gluconate vs chloride) are critical.
Q. 12
Pharmacy
Difficulty: Hard
(1 Mark)
Why is Calcium Gluconate preferred over Calcium Chloride when compounding parenteral nutrition (TPN) formulations?
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Step-by-Step Explanation & Concept Rationale
Calcium gluconate is an organic calcium salt that ionizes slowly and incompletely in solution, leaving fewer free calcium ions available to react with phosphate ions, greatly lowering precipitation risk.
Q. 13
Pharmacy
Difficulty: Easy
(1 Mark)
In industrial tablet compression, what tablet defect is described as the partial or complete horizontal separation of the top or bottom crown from the main body of the tablet?
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Step-by-Step Explanation & Concept Rationale
Capping is the separation of the top or bottom crown of a tablet from the main tablet body, typically caused by air entrapment during high-speed compression, excessive fine powder, or insufficient moisture.
Q. 14
Pharmacy
Difficulty: Easy
(1 Mark)
What is the tablet manufacturing defect where an unequal distribution of color occurs on the surface of a tablet?
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Step-by-Step Explanation & Concept Rationale
Mottling is an uneven distribution of coloring agent on the tablet surface, with light and dark spots, often due to dye migration during drying of granulation or poor dye distribution.
Q. 15
Pharmacy
Difficulty: Medium
(1 Mark)
What is the role of Magnesium Stearate in pharmaceutical tablet formulations, and what is the risk of over-blending it?
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Step-by-Step Explanation & Concept Rationale
Magnesium stearate is an essential boundary lubricant (0.25% to 1.0%). Because it is strongly hydrophobic, excessive blending time coats granule surfaces with a waxy hydrophobic film, prolonging disintegration and reducing dissolution rate.
Q. 16
Pharmacy
Difficulty: Easy
(1 Mark)
Which of the following excipients is classified as a 'Superdisintegrant' that promotes rapid tablet breakup via rapid capillary water uptake and swelling?
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Step-by-Step Explanation & Concept Rationale
Croscarmellose sodium (cross-linked sodium carboxymethylcellulose) and sodium starch glycolate are superdisintegrants that swell up to 10-20 times their volume in contact with water, rapidly breaking the tablet matrix apart within seconds.
Q. 17
Pharmacy
Difficulty: Easy
(1 Mark)
What mathematical equation describes the rate of solid drug dissolution from particles into surrounding solvent fluid?
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Step-by-Step Explanation & Concept Rationale
The Noyes-Whitney equation states that dissolution rate (dM/dt) is proportional to diffusion coefficient (D), particle surface area (A), and concentration gradient (Cs - C) across the stagnant boundary layer of thickness h.
Q. 18
Pharmacy
Difficulty: Easy
(1 Mark)
According to the Biopharmaceutics Classification System (BCS), what defines a 'Class II' drug substance?
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Step-by-Step Explanation & Concept Rationale
Under the BCS classification: Class I = High Sol, High Perm; Class II = Low Sol, High Perm; Class III = High Sol, Low Perm; Class IV = Low Sol, Low Perm. For Class II drugs (e.g., Ketoconazole, Carbamazepine), dissolution is the rate-limiting step for absorption.
Q. 19
Pharmacy
Difficulty: Easy
(1 Mark)
Which pharmacopeial dissolution testing apparatus is designated as USP Apparatus 1?
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Step-by-Step Explanation & Concept Rationale
USP Apparatus 1 is the Rotating Basket; USP Apparatus 2 is the Paddle Apparatus; USP Apparatus 3 is the Reciprocating Cylinder; USP Apparatus 4 is the Flow-Through Cell.
Q. 20
Pharmacy
Difficulty: Easy
(1 Mark)
What is the standard volume and temperature of dissolution medium specified in pharmacopeial tablet dissolution testing?
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Step-by-Step Explanation & Concept Rationale
Dissolution testing is maintained at 37.0°C ± 0.5°C to simulate human body temperature, typically in 900 mL or 500 mL of buffer or simulated gastric/intestinal fluid.
Q. 21
Pharmacy
Difficulty: Easy
(1 Mark)
In hospital drug distribution, what is the 'Unit-Dose Drug Distribution System' (UDDD)?
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Step-by-Step Explanation & Concept Rationale
The Unit-Dose Drug Distribution System dispenses each dose in a separate, sealed, labeled unit package containing the exact dose ordered. It minimizes medication administration errors, reduces drug waste, and enhances nurse efficiency.
Q. 22
Pharmacy
Difficulty: Easy
(1 Mark)
What hospital multidisciplinary committee is responsible for evaluating, selecting, and maintaining the institutional drug formulary?
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Step-by-Step Explanation & Concept Rationale
The Pharmacy and Therapeutics (P&T) Committee consists of physicians, clinical pharmacists, nurses, and administrators who review clinical efficacy, safety, and pharmacoeconomic data to manage the hospital drug formulary.
Q. 23
Pharmacy
Difficulty: Easy
(1 Mark)
What clinical process involves creating the most accurate list possible of all medications a patient is taking and comparing it against admission, transfer, and discharge orders?
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Step-by-Step Explanation & Concept Rationale
Medication reconciliation is a formal process across healthcare transitions to prevent medication errors such as omissions, duplications, dosing errors, and drug interactions.
Q. 24
Pharmacy
Difficulty: Easy
(1 Mark)
According to the World Health Organization (WHO), what defines an 'Adverse Drug Reaction' (ADR)?
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Step-by-Step Explanation & Concept Rationale
WHO defines an ADR as 'a response to a medicine which is noxious and unintended, and which occurs at doses normally used in man for the prophylaxis, diagnosis, or therapy of disease, or for the modification of physiological function.'
Q. 25
Pharmacy
Difficulty: Easy
(1 Mark)
In the Rawlins-Thompson classification of adverse drug reactions, what characterizes a 'Type A' ADR?
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Step-by-Step Explanation & Concept Rationale
Type A (Augmented) reactions are common, predictable, dose-related extensions of the drug's known pharmacological actions (e.g., hypoglycemia from insulin, bleeding from warfarin). Type B (Bizarre) reactions are uncommon, unpredictable, and dose-independent (e.g., anaphylaxis).
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