NEET-PG 2013 Practice Questions

Q: Phase II block is seen with:

SCh infusion. ***SCh infusion*** - A **prolonged infusion or high dose** of succinylcholine (SCh) can lead to a **Phase II block**, a desensitizing block resembling that of a non-depolarizing neuromuscular blocker. - This occurs due to the **persistent presence of SCh** at the neuromuscular junction, which initially depolarizes the endplate (Phase I) but eventually leads to **receptor desensitization** and repolarization, preventing further muscle contraction. *Single dose SCh* - A **single bolus dose of succinylcholine** typically produces a **Phase I block**, characterized by initial muscle fasciculations followed by flaccid paralysis due to persistent depolarization of the motor endplate. - It resolves relatively quickly as **succinylcholine is rapidly hydrolyzed** by pseudocholinesterase, usually not leading to a prolonged desensitization characteristic of Phase II. *Mivacurium* - **Mivacurium** is an intermediate-acting, **non-depolarizing neuromuscular blocker**. - Its mechanism of action involves **competitively binding to nicotinic acetylcholine receptors** at the neuromuscular junction, thereby preventing acetylcholine from binding and initiating muscle contraction, which is fundamentally different from a Phase II block caused by prolonged depolarization. *None of the options* - This option is incorrect because **SCh infusion** is a recognized cause of Phase II block. - The phenomenon of Phase II block is a well-established pharmacological response to **excessive and prolonged exposure** to depolarizing neuromuscular blockers like succinylcholine.

Q: A person has lost his leg in an accident and is unable to walk. This condition is classified as -

Disability. ***Disability*** - The loss of a limb leading to inability to walk is classified as a **disability** because it significantly impairs a major life activity. - According to the **WHO International Classification of Functioning, Disability and Health (ICF)**, disability is an **umbrella term** encompassing impairments (loss of limb), activity limitations (inability to walk), and participation restrictions. - The scenario describes both an **impairment** (anatomical loss) and an **activity limitation** (functional consequence), which together constitute a **disability**. *Medical condition* - While the accident caused a medical condition (trauma, amputation), the term "medical condition" describes the **disease or injury state** itself, not its functional impact. - The question asks for the **classification** of the inability to walk, which is a functional consequence, not the primary medical diagnosis. *Physical limitation* - This is a **descriptive term** for restricted physical capacity but not a standard **classification** in public health terminology. - In the WHO ICF framework, this would fall under "activity limitation," which is a component of disability rather than a separate classification. *Mobility challenge* - This is a colloquial or lay term describing the **difficulty in moving** but lacks the specificity of formal medical classification. - While accurate descriptively, it does not represent the **standardized terminology** used in Community Medicine and rehabilitation frameworks.

Q: Most important component of level of living is

Occupation. ***Occupation*** - **Occupation** is the most important component of the level of living as it is the primary determinant of **income**, which forms the economic foundation of the level of living. - In Community Medicine, "level of living" is an **objective economic indicator** primarily measured by income and consumption patterns, distinguishing it from the broader concept of "quality of life." - A stable and remunerative occupation ensures regular income, which directly enables individuals to afford basic necessities (food, clothing, shelter) and access other essential resources like healthcare and education. - Occupation also confers social status and determines the standard of living that an individual or family can maintain. *Education* - While **education** is crucial for human development and enhances future opportunities, it serves as a means to achieve better employment rather than being a direct component of the level of living itself. - Education's impact on living standards is realized primarily through its influence on occupational opportunities and earning potential. *Housing* - **Housing** is an important indicator of living standards and reflects the level of living, but the quality and affordability of housing are dependent on income derived from occupation. - It is more of an outcome of the level of living rather than its primary determinant. *Health* - **Health** is essential for well-being and productivity, but in the context of "level of living" as an economic measure, it is often a consequence of adequate income and access to resources (which stem from occupation) rather than the primary component. - Good health enables productivity, but health status alone does not define the economic level of living without associated income security.

Q: Which of the following statements about slow sand filters is true?

Requires a longer duration for filtration. ***Requires a longer duration for filtration*** - **Slow sand filters** operate at a much lower filtration rate (0.1–0.4 m/h) compared to rapid sand filters, thus requiring a **longer duration** to process the same volume of water. - This low filtration rate allows for the formation of a biological layer, the **schmutzdecke**, which is responsible for much of the purification. *Is more expensive than other filters* - **Slow sand filters** are generally **less expensive to construct and operate** than rapid sand filters because they do not require extensive chemical coagulation, flocculation, or backwashing equipment. - Their primary cost is often land acquisition due to the **larger footprint** required. *Uses sand size of 0.4 - 0.7 mm* - **Slow sand filters** use **finer (smaller) sand**, typically with an **effective size of 0.15-0.30 mm**, which is smaller than the sand used in rapid sand filters (0.4-0.7 mm). - The smaller sand particle size contributes to the slower filtration rate and enhanced biological treatment. *Occupies less space than other filters* - **Slow sand filters** require **significantly more land area** than rapid sand filters for a given output because of their low filtration rate and large basin size. - This larger footprint can be a limiting factor in areas with high land costs.

Q: What is the penalty for violating the Dowry Prohibition Act?

15000 Rs and 5 years. ***15000 Rs and 5 years*** - The **Dowry Prohibition Act of 1961** (as amended) stipulates that any person giving or taking dowry, or abetting the giving or taking of dowry, shall be punishable with imprisonment for a term which shall **not be less than five years** and with a fine which shall **not be less than fifteen thousand rupees** or the amount of the value of such dowry, whichever is more. - This represents the **minimum prescribed penalty** for offenses under Section 3 of the Act. *30000 Rs and 7 years* - While dowry-related offenses can lead to significant penalties, a flat fine of **30,000 Rs** and an imprisonment of **7 years** is not the standard or minimum penalty outlined in the **Dowry Prohibition Act**. - The minimum fine is **15,000 Rs or the dowry amount, whichever is more**, and the minimum imprisonment is **five years**, not seven. *Life imprisonment* - **Life imprisonment** is typically reserved for very severe crimes, and while dowry-related deaths can lead to such severe penalties under **Section 304B IPC for dowry death**, violating the general provisions of the **Dowry Prohibition Act** itself (giving or taking dowry under Section 3) does not directly carry a penalty of life imprisonment. - This option misrepresents the direct penalty for dowry prohibition violations under the Act. *Imprisonment for 10 years* - Imprisonment for **10 years** is not the prescribed minimum or standard penalty for violating the **Dowry Prohibition Act** under Section 3 for giving or taking dowry. - The **minimum imprisonment is five years**, with potential for longer sentences depending on the specific circumstances and judicial discretion.

Q: Which MRSA strain type is most commonly associated with hospital-acquired infections?

Phage type 80/81. ***Phage type 80/81*** - This **phage type**, particularly **epidemic methicillin-resistant *Staphylococcus aureus* (EMRSA) 15 and 16**, is historically and currently the most common cause of **hospital-acquired MRSA infections** worldwide. - It rapidly diversified and spread globally, becoming a significant nosocomial pathogen. *Phage type 83A* - While this phage type has been associated with **MRSA outbreaks**, it is not the most common strain type globally for hospital-acquired infections. - Its prevalence is more regional and sporadic compared to the widespread dominance of EMRSA 15/16. *Phage type 84* - **Phage type 84** is not widely recognized as a predominant strain associated with the majority of **hospital-acquired MRSA infections**. - Other, more virulent and successful clonal types have outcompeted it to become the most prevalent. *Phage type 85* - Similar to other less common types, **phage type 85** does not represent the major lineage responsible for the bulk of **hospital-acquired MRSA cases**. - The landscape of MRSA epidemiology is dominated by a few highly successful clonal complexes, of which 80/81 is a prime example.

Q: Which of the following is the only ovoviviparous parasite among the options provided?

Strongyloides. ***Strongyloides*** - *Strongyloides stercoralis* stands out as the only **ovoviviparous** parasite among the options, meaning that its eggs hatch while still inside the uterus of the female worm. - The female worm lays **larvated eggs** that quickly hatch into **rhabditiform larvae** in the intestine or intestinal wall, which are then passed in the feces. *Ascaris* - *Ascaris lumbricoides* is **oviparous**, laying **unembryonated eggs** that are passed in the feces and require a period of maturation in the soil to become infective. - The eggs are robust and can survive for long periods in the environment before they are ingested. *Enterobius* - *Enterobius vermicularis* (pinworm) is also **oviparous**, with the female worm migrating to the perianal region to lay **embryonated eggs** on the skin. - These eggs are immediately infective to humans upon ingestion. *Ancylostome* - Ancylostomes (hookworms) are **oviparous** and lay **thin-shelled eggs** that are passed in the feces and hatch into rhabditiform larvae in the soil. - These larvae then develop into infective **filariform larvae** that penetrate the skin.

Q: Amoebic liver abscess can be diagnosed by demonstrating-

Trophozoites in the pus. ***Trophozoites in the pus*** - **Amoebic liver abscesses** are caused by the invasive **trophozoite stage** of *Entamoeba histolytica*. - Demonstrating **trophozoites** in the characteristic **'anchovy paste' pus** aspirated from the abscess cavity is diagnostic. *Cysts in the pus* - **Cysts** are the **infective stage** of *Entamoeba histolytica* and are typically found in the **feces**, not in an abscess. - Cysts are responsible for transmission and survival outside the host, but they do not cause invasive disease. *Cysts in the liver* - The disease in the liver is caused by **trophozoites**, which invade the intestinal wall and then spread to the liver. - **Cysts** are never found within the liver parenchyma or abscesses. *Trophozoites in the feces* - While **trophozoites** can be found in the feces during acute amoebic dysentery, their presence alone does not confirm a liver abscess. - Furthermore, **trophozoites** are fragile and often difficult to detect in stool samples, especially once the stool has cooled.

Q: Which second generation antihistaminic does not produce an active metabolite?

Cetirizine. ***Cetirizine*** - Cetirizine is unique among second-generation antihistamines as it is an **active metabolite** of hydroxyzine and **does not undergo further significant metabolism** to an active compound. - This characteristic contributes to its relatively **predictable pharmacokinetics** and reduced potential for drug interactions related to metabolism. *Loratadine* - Loratadine is a **prodrug** that is extensively metabolized in the liver by **CYP3A4 and CYP2D6** to its active metabolite, **desloratadine**. - Desloratadine is responsible for most of the **antihistaminic effects** of loratadine. *Terfenadine* - Terfenadine is a **prodrug** that is extensively metabolized by **CYP3A4** to its active metabolite, **fexofenadine**. - Due to its **cardiotoxicity** (QT prolongation) when its metabolism was inhibited, terfenadine was withdrawn from the market, and fexofenadine was developed as a safer alternative. *None of the options* - This option is incorrect because **cetirizine** does not produce an active metabolite, making it a valid answer for the question.

Question 1

Phase II block is seen with:

Accepted Answer

SCh infusion

Answer

Single dose SCh

Answer

Mivacurium

Answer

None of the options

Question 2

A person has lost his leg in an accident and is unable to walk. This condition is classified as -

Accepted Answer

Disability

Answer

Medical condition

Answer

Physical limitation

Answer

Mobility challenge

Question 3

Most important component of level of living is

Accepted Answer

Occupation

Answer

Education

Answer

Housing

Answer

Health

Question 4

Which of the following statements about slow sand filters is true?

Accepted Answer

Requires a longer duration for filtration

Answer

Is more expensive than other filters

Answer

Uses sand size of 0.4 - 0.7 mm

Answer

Occupies less space than other filters

Question 5

What is the penalty for violating the Dowry Prohibition Act?

Accepted Answer

15000 Rs and 5 years

Answer

30000 Rs and 7 years

Answer

Life imprisonment

Answer

Imprisonment for 10 years

Question 6

Which MRSA strain type is most commonly associated with hospital-acquired infections?

Accepted Answer

Phage type 80/81

Answer

Phage type 83A

Answer

Phage type 85

Answer

Phage type 84

Question 7

Which of the following is the only ovoviviparous parasite among the options provided?

Accepted Answer

Strongyloides

Answer

Ascaris

Answer

Enterobius

Answer

Ancylostoma

Question 8

Amoebic liver abscess can be diagnosed by demonstrating-

Accepted Answer

Trophozoites in the pus

Answer

Trophozoites in the feces

Answer

Cysts in the pus

Answer

Cysts in the liver

Question 9

Which of the following statements about hypolipidemic drugs is false?

Accepted Answer

Cholesterol reducing drugs are contraindicated in child less than 8 years

Answer

Gemfibrozil causes myopathy

Answer

Gemfibrozil can increase myopathy caused by statins

Answer

Lovastatin can cause hepatic dysfunction

Question 10

Which second generation antihistaminic does not produce an active metabolite?

Accepted Answer

Cetirizine

Answer

Loratadine

Answer

Terfenadine

Answer

None of the options

NEET-PG 2013

Anesthesiology

Community Medicine

Forensic Medicine

Microbiology

Pharmacology