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Objective Questions

Latest Pharmacist Exams Exam Question (Objective Questions), MCQ in English

Subjects : Pharmacist

Question Bank Pharmacist Exam - English
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Pharmacist

Question 1Single Answer
Which is an important advantage of liposomes as drug-delivery carriers?
  1. A
    Ability to encapsulate both hydrophilic and lipophilic drugs
  2. B
    Guaranteed elimination of drug toxicity
  3. C
    Mandatory rapid renal clearance
  4. D
    Complete prevention of drug degradation in every formulation
Question 2Single Answer
Liposomes are primarily composed of:
  1. A
    Polysaccharides
  2. B
    Proteins
  3. C
    Phospholipids
  4. D
    Nucleic acids
Question 3Single Answer
The aqueous cavity of a liposome is best suited for encapsulating:
  1. A
    Hydrophobic drugs
  2. B
    Lipophilic drugs
  3. C
    Hydrophilic drugs
  4. D
    Gaseous drugs
Question 4Single Answer
Which method is commonly used for the preparation of multilamellar vesicles (MLVs)?
  1. A
    Sonication
  2. B
    Extrusion
  3. C
    Thin-film hydration
  4. D
    Reverse-phase evaporation
Question 5Single Answer
Sterically stabilized liposomes, often referred to as "stealth liposomes," are modified with which polymer to prolong circulation time?
  1. A
    Polyvinylpyrrolidone (PVP)
  2. B
    Polyethylene glycol (PEG)
  3. C
    Hydroxypropyl methylcellulose (HPMC)
  4. D
    Ethylcellulose
Question 6Single Answer
Under the commonly used general definition, nanoparticles have dimensions approximately within which range?
  1. A
    1–100 nm
  2. B
    1–1000 µm
  3. C
    1–10 mm
  4. D
    10–100 cm
Question 7Single Answer
Which of the following materials is commonly used for the fabrication of polymeric nanoparticles?
  1. A
    Gold
  2. B
    Silicon dioxide
  3. C
    Polylactic acid (PLA)
  4. D
    Carbon nanotubes
Question 8Single Answer
Nanoparticles can enhance drug delivery by:
  1. A
    Increasing first-pass metabolism
  2. B
    Promoting drug degradation
  3. C
    Improving drug penetration across biological barriers
  4. D
    Enhancing non-specific drug distribution
Question 9Single Answer
Which of the following is a method for preparing nanoparticles by precipitation?
  1. A
    Emulsification-solvent evaporation
  2. B
    Nanoprecipitation
  3. C
    High-pressure homogenization
  4. D
    Spray drying
Question 10Single Answer
The enhanced permeability and retention effect has traditionally been associated with passive accumulation of nanocarriers particularly in?
  1. A
    Some solid tumors with abnormal vasculature
  2. B
    All healthy tissues equally
  3. C
    Normal intact brain tissue universally
  4. D
    Every organ regardless of vascular properties
Question 11Single Answer
Transdermal drug delivery systems (TDDS) primarily deliver drugs through which route?
  1. A
    Oral
  2. B
    Intravenous
  3. C
    Across the skin
  4. D
    Inhalation
Question 12Single Answer
The outermost layer of the skin that acts as the primary barrier to drug permeation is the:
  1. A
    Dermis
  2. B
    Hypodermis
  3. C
    Stratum corneum
  4. D
    Epidermis
Question 13Single Answer
Permeation enhancers are often included in transdermal formulations to:
  1. A
    Increase drug stability
  2. B
    Reduce skin irritation
  3. C
    Enhance drug penetration across the skin
  4. D
    Control the release rate from the patch
Question 14Single Answer
In which transdermal patch design is the drug incorporated directly into the pressure-sensitive adhesive layer?
  1. A
    Drug-in-adhesive system
  2. B
    Reservoir system
  3. C
    Membrane-controlled reservoir only
  4. D
    Osmotic implant
Question 15Single Answer
Iontophoresis, as an enhancement technique for transdermal delivery, utilizes:
  1. A
    Ultrasound waves
  2. B
    Magnetic fields
  3. C
    Electrical current
  4. D
    Microneedles
Question 16Single Answer
Which physicochemical property can substantially limit passive transdermal drug delivery?
  1. A
    Excessively large molecular size
  2. B
    Avoidance of gastrointestinal first-pass metabolism
  3. C
    Ability to provide sustained delivery
  4. D
    Possibility of terminating therapy by patch removal
Question 17Single Answer
Niosomes are vesicular systems similar to liposomes but are composed of:
  1. A
    Phospholipids
  2. B
    Non-ionic surfactants
  3. C
    Proteins
  4. D
    Cholesterol esters
Question 18Single Answer
Which property can make niosomes advantageous compared with conventional phospholipid liposomes?
  1. A
    Greater chemical stability of nonionic surfactants under suitable conditions
  2. B
    Guaranteed higher encapsulation of every drug
  3. C
    Guaranteed superior targeting of every tissue
  4. D
    Complete absence of formulation instability
Question 19Single Answer
Solid lipid nanoparticles (SLNs) are composed of:
  1. A
    Biodegradable polymers
  2. B
    Solid lipids
  3. C
    Liposomes encapsulated in a solid matrix
  4. D
    Nanoparticles coated with a lipid layer
Question 20Single Answer
Which of the following is a characteristic of solid lipid nanoparticles (SLNs)?
  1. A
    Liquid core
  2. B
    High drug loading capacity for hydrophilic drugs
  3. C
    Potential for controlled drug release
  4. D
    Limited stability
Question 21Single Answer
Nanostructured lipid carriers (NLCs) differ from SLNs by having:
  1. A
    A smaller particle size
  2. B
    A more crystalline matrix
  3. C
    A blend of solid and liquid lipids
  4. D
    A higher surface area
Question 22Single Answer
Which statement about routes of administration of nanoparticle-based drug-delivery systems is correct?
  1. A
    They may be designed for oral, parenteral, pulmonary and other routes depending on formulation
  2. B
    They can be administered only orally
  3. C
    They can be administered only intravenously
  4. D
    They can never be administered by inhalation
Question 23Single Answer
Ligand-targeted liposomes are modified with specific molecules to:
  1. A
    Increase their circulation time
  2. B
    Enhance drug solubility
  3. C
    Bind to receptors on target cells
  4. D
    Prevent opsonization
Question 24Single Answer
Dendrimers are branched polymeric nanoparticles with:
  1. A
    A hydrophobic core and hydrophilic surface
  2. B
    A well-defined, tree-like structure
  3. C
    A lamellar structure similar to liposomes
  4. D
    A porous matrix for drug encapsulation
Question 25Single Answer
Which structural property of dendrimers makes them useful for targeted drug-delivery applications?
  1. A
    Multiple surface functional groups that can be modified with targeting ligands
  2. B
    Complete absence of branching
  3. C
    Mandatory phospholipid bilayer formation
  4. D
    Inability to interact with therapeutic molecules
Question 26Single Answer
What is the primary barrier that microneedles are designed to bypass during transdermal or intradermal drug delivery?
  1. A
    Stratum corneum
  2. B
    Subcutaneous adipose tissue
  3. C
    Skeletal muscle
  4. D
    Periosteum
Question 27Single Answer
Which is an important advantage of microneedle-based delivery compared with conventional hypodermic injection?
  1. A
    Potential for minimally invasive delivery with reduced pain
  2. B
    Guaranteed delivery of unlimited drug quantities
  3. C
    Guaranteed systemic bioavailability of every drug
  4. D
    Faster onset for every medicine
Question 28Single Answer
Hydrogels used in drug delivery systems are typically composed of:
  1. A
    Lipids
  2. B
    Proteins
  3. C
    Cross-linked hydrophilic polymers
  4. D
    Inorganic materials
Question 29Single Answer
Stimuli-responsive hydrogels can release drugs in response to changes in:
  1. A
    Drug concentration
  2. B
    Atmospheric pressure
  3. C
    pH, temperature, or light
  4. D
    Patient's emotional state
Question 30Single Answer
Which of the following is an example of a transdermal patch used for hormone replacement therapy?
  1. A
    Nitroglycerin patch
  2. B
    Scopolamine patch
  3. C
    Estradiol patch
  4. D
    Fentanyl patch
Question 31Single Answer
The rate of drug release from a reservoir-type transdermal patch is primarily controlled by:
  1. A
    The concentration of the drug in the adhesive
  2. B
    The surface area of the patch
  3. C
    The properties of the rate-controlling membrane
  4. D
    The hydration level of the skin
Question 32Single Answer
Which technique is commonly used to determine the hydrodynamic particle size of nanoparticles and can also be used alongside electrophoretic measurements for zeta-potential characterization?
  1. A
    Dynamic light scattering-based analysis
  2. B
    Gas chromatography
  3. C
    High-performance liquid chromatography
  4. D
    Differential scanning calorimetry
Question 33Single Answer
Zeta potential represents the electrical potential at approximately which location around a dispersed particle?
  1. A
    Slipping or shear plane
  2. B
    Geometric center of the particle
  3. C
    Interior of the nanoparticle core
  4. D
    Outer boundary of the bulk liquid
Question 34Single Answer
Which factor can present an important challenge for orally administered nanoparticle drug-delivery systems?
  1. A
    Degradation or destabilization in the gastrointestinal environment
  2. B
    Mandatory passage across the blood-brain barrier
  3. C
    Complete absence of gastrointestinal barriers
  4. D
    Guaranteed quantitative intestinal absorption
Question 35Single Answer
Mucoadhesive nanoparticles are designed to:
  1. A
    Enhance drug penetration through the skin
  2. B
    Adhere to the mucus layer, prolonging residence time
  3. C
    Target specific receptors on immune cells
  4. D
    Increase the solubility of hydrophobic drugs
Question 36Single Answer
Which of the following is a common application of transdermal patches?
  1. A
    Treatment of acute infections
  2. B
    Delivery of large protein molecules
  3. C
    Management of chronic pain
  4. D
    Rapid onset of action drugs
Question 37Single Answer
The term "occlusion" in the context of transdermal patches refers to:
  1. A
    Enhancing drug solubility within the patch
  2. B
    Preventing drug leakage from the patch
  3. C
    Hydrating the stratum corneum to enhance permeability
  4. D
    Increasing the adhesive strength of the patch
Question 38Single Answer
Which of the following is NOT a common component of a transdermal patch?
  1. A
    Backing layer
  2. B
    Drug reservoir or matrix
  3. C
    Rate-controlling membrane (in some designs)
  4. D
    Effervescent agents
Question 39Single Answer
How can appropriately designed liposomal or niosomal formulations improve therapeutic performance?
  1. A
    By modifying drug distribution and potentially increasing exposure at desired sites
  2. B
    By invariably increasing drug metabolism
  3. C
    By guaranteeing complete elimination of adverse effects
  4. D
    By causing nonspecific distribution in every tissue
Question 40Single Answer
Which of the following advanced drug delivery systems is often used for gene therapy?
  1. A
    Transdermal patches
  2. B
    Lipoplexes and polyplexes (nanoparticles complexed with nucleic acids)
  3. C
    Solid lipid nanoparticles
  4. D
    Niosomes
Question 41Single Answer
The process by which nanoparticles are taken up by cells is known as:
  1. A
    Effusion
  2. B
    Diffusion
  3. C
    Endocytosis
  4. D
    Osmosis
Question 42Single Answer
Which drug property strongly influences passive permeation through intact skin?
  1. A
    Molecular size and partitioning characteristics
  2. B
    Tablet color
  3. C
    Manufacturer's trademark
  4. D
    Package size
Question 43Single Answer
Nanoparticles coated with polyethylene glycol (PEG) are often used to:
  1. A
    Enhance cellular uptake
  2. B
    Increase opsonization and phagocytosis
  3. C
    Prolong circulation time in the bloodstream
  4. D
    Improve drug solubility for hydrophobic drugs
Question 44Single Answer
Which of the following is a potential advantage of advanced drug delivery systems over conventional formulations?
  1. A
    Lower manufacturing costs
  2. B
    Reduced frequency of dosing
  3. C
    Faster onset of action for all drugs
  4. D
    Elimination of the need for preservatives
Question 45Single Answer
What category of intellectual property right grants exclusive rights for an invention, allowing the patent holder to exclude others from making, using, or selling the invention for a limited period?
  1. A
    Trademark
  2. B
    Copyright
  3. C
    Patent
  4. D
    Trade secret
Question 46Single Answer
Under the United States patent system, which three categories of patents are recognized as the principal statutory patent types?
  1. A
    Utility, design and plant patents
  2. B
    Product, process and trademark patents
  3. C
    Chemical, mechanical and copyright patents
  4. D
    Provisional, permanent and international patents
Question 47Single Answer
Under U.S. patent law, which type of patent protects a new, original and ornamental design for an article of manufacture?
  1. A
    Design patent
  2. B
    Utility patent
  3. C
    Plant patent
  4. D
    Provisional application
Question 48Single Answer
Under U.S. patent law, which patent category may protect a new and distinct variety of plant that meets the statutory requirements for plant-patent protection?
  1. A
    Plant patent
  2. B
    Design patent
  3. C
    Trademark
  4. D
    Copyright
Question 49Single Answer
Under the general TRIPS framework, the term of patent protection available to qualifying inventions must not end before the expiration of?
  1. A
    20 years from the filing date
  2. B
    10 years from the filing date
  3. C
    15 years from grant
  4. D
    50 years from grant
Question 50Single Answer
Under current U.S. law, what is generally the term of a design patent resulting from an application filed on or after May 13, 2015?
  1. A
    15 years from grant
  2. B
    20 years from filing
  3. C
    10 years from filing
  4. D
    25 years from grant
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