Select the correct statement:
Mycoplasma has cell wall
plasmids are present in gram negative bacteria
Gram negative bacteria form spores
bacterial ribosomes are not the major target for antibacterial drugs
Gram positive bacteria have peri-plasmic space
The Correct Answer is B
Bacterial structural anatomy varies significantly between different taxa, influencing their environmental resilience and susceptibility to antibiotics. Key differences exist in the composition of the cell envelope, the presence of extrachromosomal DNA, and specialized reproductive structures. These distinctions are the basis for the Gram stain classification. Knowledge of these structures is essential for identifying pathogens and selecting appropriate antimicrobial therapies in clinical practice.
Rationale:
A. Mycoplasma is unique among bacteria because it completely lacks a cell wall. Instead, its cell membrane contains sterols, which provide some structural integrity. Because they lack peptidoglycan, they are naturally resistant to beta-lactam antibiotics like penicillin. Stating that Mycoplasma has a cell wall is a biological inaccuracy that ignores their defining taxonomic feature.
B. Plasmids are small, extrachromosomal circular DNA molecules frequently found in gram-negative bacteria, as well as some gram-positives. They often carry accessory genes, such as those for antibiotic resistance (R-plasmids) or virulence factors. Plasmids can be transferred between bacteria through conjugation. This is a major mechanism for the spread of multi-drug resistance in clinical pathogens.
C. Gram-negative bacteria do not typically form spores; this capability is almost exclusively reserved for certain genera of gram-positive bacteria, such as Bacillus and Clostridium. Endospores are highly resistant structures that allow the cell to survive environmental extremes. Gram-negative cell walls, with their outer membrane, do not support the complex process of sporulation seen in specific gram-positive lineages.
D. Bacterial ribosomes are, in fact, a major target for many classes of antibacterial drugs. Antibiotics such as aminoglycosides, tetracyclines, and macrolides work by binding to the 30S or 50S subunits to inhibit protein synthesis. Because bacterial 70S ribosomes differ structurally from eukaryotic 80S ribosomes, they allow for selective toxicity. This statement incorrectly denies a fundamental principle of pharmacology.
E. Gram-positive bacteria do not possess a true periplasmic space; this structure is a characteristic of gram-negative bacteria. The periplasm is the region between the inner cytoplasmic membrane and the outer membrane in gram-negative cells. Gram-positive cells have a thick peptidoglycan layer directly outside the plasma membrane. They lack the outer membrane necessary to define a periplasmic compartment.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Dry powder inhalers (DPIs) utilize various mechanical designs to ensure patients receive an accurate dose of bronchodilators or corticosteroids. Proper technique is vital, as these devices are breath-actuated and require sufficient inspiratory flow. Manufacturers often include visual feedback mechanisms to confirm that a dose has been successfully loaded and inhaled. These safety features reduce the risk of double-dosing and improve patient confidence in their treatment.
Rationale:
A. Advair Diskus is a multi-dose DPI that utilizes a dose counter window showing the number of remaining doses. It does not use a color-changing green-to-red signal to confirm individual dose administration. Instead, it relies on a mechanical lever and a numerical countdown. Patients must manually check the number to ensure the device is not empty before use.
B. Anoro Ellipta features a simple numerical dose counter located on the side of the device. The Ellipta design is known for its large digits that turn red only when the inhaler is nearly empty (usually at 10 doses remaining). It does not provide a color-coded confirmation for every single puff taken, making it distinct from the Pressair mechanism.
C. Tudorza Pressair is specifically designed with a feedback window that turns from green to red. When the patient presses the button, the window turns green, indicating the dose is ready. Upon successful inhalation with sufficient force, the window triggers back to red, confirming the medication has been delivered. This ensures the patient knows the bronchodilator reached their lungs.
D. Spiriva HandiHaler requires the patient to insert a capsule into a chamber and pierce it manually. Confirmation of the dose is achieved through a vibrating sound (rattling) of the capsule during inhalation and visual inspection of the empty capsule afterward. It lacks any electronic or mechanical color-change indicator windows, relying instead on auditory and physical feedback from the device.
E. Arcapta Neohaler is another capsule-based DPI where the patient must see the capsule spinning and hear a whirring sound during the breath. Like the HandiHaler, it provides visual confirmation through a clear chamber, but it does not utilize a chromatic window transition. The absence of a green-to-red indicator distinguishes its user interface from the Pressair technology.
Correct Answer is A
Explanation
The patient interview is a fundamental component of the clinical data collection process in pharmacy practice. Its primary purpose is to gather accurate information regarding a patient's medication history, health beliefs, and therapy goals. A successful interview requires the use of active listening and open-ended questions. This interaction serves as the foundation for identifying drug-related problems and developing a collaborative care plan that respects the patient's perspective.
Rationale:
A. To establish a trusting relationship is a primary goal of the interview, as it encourages honest communication and improves medication adherence. When a patient feels respected and heard, they are more likely to disclose sensitive information about side effects or missed doses. This therapeutic alliance is essential for the pharmacist to provide personalized and effective pharmaceutical care.
B. Scolding a patient for non-adherence is counterproductive and damages the professional relationship. Such behavior creates a "blame culture" that discourages the patient from being honest about their challenges in the future. Instead, the pharmacist should use motivational interviewing techniques to identify barriers and support the patient in finding solutions to improve their health outcomes.
C. Offering personal advice is inappropriate in a professional setting; the pharmacist must provide evidence-based clinical recommendations. Personal anecdotes do not carry the scientific weight required for safe medical guidance and may be biased. The pharmacist's role is to translate pharmacological data into actionable health information, not to share subjective opinions or personal lifestyle choices.
D. Making a medical diagnosis is outside the scope of practice for a pharmacist; diagnosis is the legal responsibility of a physician or advanced practice provider. The pharmacist identifies medication-related problems and monitors drug therapy, but they do not define the underlying disease state. Misrepresenting a pharmacist's role as a diagnostic one can lead to legal and safety issues.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.