NEET-PG 2012 Practice Questions

Q: What is the best indicator of the availability, utilization, and effectiveness of health services?

IMR. ***IMR*** - The **Infant Mortality Rate (IMR)** is widely considered the best single indicator of the availability, utilization, and effectiveness of health services because it reflects the health status of a population and the quality of prenatal, perinatal, and postnatal care. - A lower IMR generally indicates better access to maternal and child healthcare, nutrition, sanitation, and overall societal development. *MMR* - The **Maternal Mortality Ratio (MMR)** reflects the risk of maternal death relative to the number of live births and is a measure of the quality of maternal healthcare services. - While important, MMR focuses specifically on maternal health outcomes and does not encompass the broader availability and effectiveness of health services for all age groups as comprehensively as IMR. *Hospital bed OCR* - **Hospital bed occupancy rate (OCR)** indicates the proportion of available hospital beds that are occupied over a given period, reflecting the utilization of hospital resources. - While it offers insight into hospital efficiency and demand, it does not directly reflect the overall availability, effectiveness, or quality of primary care, preventive services, or broader public health interventions. *DALY* - **Disability-Adjusted Life Years (DALY)** measure the total number of healthy life years lost due to premature mortality and disability from disease or injury. - DALYs provide a comprehensive measure of disease burden but are more focused on quantifying the impact of diseases and injuries on health than on directly assessing the availability, utilization, and effectiveness of health services themselves.

Q: Which of the following statements is true for a left-skewed distribution?

Median > Mean. ***Median > Mean*** - In a **left-skewed distribution**, the bulk of the data is on the right, and the tail extends to the left, pulling the **mean** towards the lower values. - This pull results in the **mean** being less than the **median**, which is less affected by extreme values in the tail. *Mean = Median* - This relationship holds true for a **symmetrical distribution**, such as a **normal distribution**, where the data is evenly distributed around the center. - In a **skewed distribution**, the mean and median will diverge due to the presence of outliers or extreme values on one side. *Mean>Mode* - This statement is characteristic of a **right-skewed distribution**, where the tail extends to the right, pulling the **mean** to a higher value than the **mode**. - In a right-skewed distribution, typically **mode < median < mean**. *Mean < Mode* - This statement indicates that the **mode** (the most frequent value) is greater than the **mean**, which is not a defining characteristic of a left-skewed distribution. - While it can occur, the primary relationship for left-skewness is **mean < median**.

Q: Raindrop pigmentation is caused by?

Arsenic. ***Arsenic*** - Chronic **arsenic** exposure can lead to characteristic skin manifestations, including **raindrop pigmentation**, which appears as small, scattered hypopigmented macules surrounded by hyperpigmented skin, particularly on the trunk and extremities. - This pigmentation is a result of altered **melanin distribution** and **keratinocyte damage** due to arsenic toxicity. *Clofazimine* - **Clofazimine** is an anti-leprosy drug that can cause **reddish-brown to bluish-black skin discoloration**, which is a diffuse pigmentation, not "raindrop" in nature. - The pigmentation associated with clofazimine is due to drug deposition in tissues and is usually reversible. *Dapsone* - **Dapsone** is primarily known for causing **methemoglobinemia** and **hemolytic anemia**, especially in patients with G6PD deficiency. - While it can cause some dermatological side effects, **pigmentation** is not a characteristic feature, and it does not produce a "raindrop" pattern. *Minocycline* - **Minocycline** can cause various types of pigmentation, including **blue-gray discoloration** in scars, shins, and mucous membranes, as well as diffuse brown pigmentation. - However, the pigmentation caused by minocycline is typically diffuse or localized to specific areas, and it does not present as "raindrop pigmentation."

Q: In nutrient agar the concentration of agar is

1.5%. ***1.5%*** - A concentration of **1.5% agar** is the standard amount used in **nutrient agar** to provide a solid medium for bacterial growth. - This concentration allows for proper solidification, forming a stable gel suitable for culturing microorganisms. *1%* - A 1% agar concentration would likely result in a **softer, less firm medium**, which might not be ideal for handling or for supporting the colonies of some microorganisms. - This concentration is sometimes used for specific purposes, such as preparing **semi-solid agars** for motility studies, but not for general solid media. *3%* - A 3% agar concentration would create a **much firmer, more rigid gel**, which could potentially hinder the diffusion of nutrients to bacterial colonies or make microbial inoculation more difficult. - Such high concentrations are less commonly used for routine bacterial culture and are reserved for specific applications requiring a very stiff medium. *4%* - A 4% agar concentration would produce an **extremely firm and brittle gel**, making it very hard to work with and potentially impeding bacterial growth due to poor nutrient diffusion. - This concentration is significantly higher than what is typically required for standard solid culture media.

Q: What is the correct order of application of reagents in the complete Gram staining procedure?

Gentian violet → Iodine → Alcohol/Acetone → Safranin. **Gentian violet → Iodine → Alcohol/Acetone → Safranin** - **Gentian violet** (or crystal violet) is the **primary stain** that colors all cells purple. - **Iodine** acts as a **mordant**, forming a crystal violet-iodine complex within the cell walls. - **Alcohol/Acetone** is the **decolorizer**, washing out the primary stain from Gram-negative cells but not from Gram-positive cells. - Finally, **Safranin** is the **counterstain** that stains decolorized Gram-negative cells pink or red. *Iodine → Gentian violet → Alcohol/Acetone → Safranin* - **Iodine** is a mordant and needs a primary stain (like gentian violet) to bind to and form a complex; applying it first would not effectively stain the cells. - The correct sequence requires the primary stain to be applied before the mordant can fix it. *Safranin → Gentian violet → Iodine → Alcohol/Acetone* - **Safranin** is a counterstain and should be applied last to stain the decolorized Gram-negative cells, not as the first reagent. - Applying reagents out of order would lead to incorrect staining results, as **safranin** is meant to provide contrast after decolorization. *Gentian violet → Alcohol/Acetone → Iodine → Safranin* - **Alcohol/Acetone** (decolorizer) is applied too early in this sequence; it should be used after the mordant (iodine) has formed a complex with the primary stain. - Applying the decolorizer before the mordant would prevent the formation of the crystal violet-iodine complex, leading to incorrect differentiation between Gram-positive and Gram-negative bacteria.

Q: Which virus is primarily responsible for causing Ebola virus disease, a type of hemorrhagic fever?

Ebola virus. ***Ebola virus*** - The disease is named after the **Ebola River** in Congo, where it was first identified. - The **Ebola virus** is a member of the **Filoviridae family**, known for causing severe hemorrhagic fevers. *West Nile virus* - This virus is primarily transmitted by **mosquitoes** and causes **West Nile fever**, which can lead to neurological disease. - It does not cause the hemorrhagic fever associated with Ebola virus disease. *Phlebovirus* - **Phlebovirus** is a genus of viruses that includes several species capable of causing **encephalitis** or **febrile illness** with headache and myalgia. - While some can cause hemorrhagic fevers, it is not the primary agent for the disease specifically known as **Ebola virus disease**. *None of the options* - This option is incorrect because the **Ebola virus** is indeed listed as an option and is the correct pathogen responsible for Ebola virus disease.

Q: Which of the following is a primary cell line?

Chick embryo fibroblasts. ***Chick embryo fibroblasts*** - Primary cell lines are directly derived from **tissues** and have a limited lifespan in culture before undergoing senescence. - **Chick embryo fibroblasts** are isolated directly from chick embryos and propagated for a limited number of passages, making them a true primary cell culture. *Hela cells* - HeLa cells are a well-known example of a **continuous cell line**, meaning they can be cultured indefinitely. - They were originally derived from a cervical cancer patient and are considered **immortalized**. *Vero cells* - Vero cells are an **immortalized cell line** derived from the kidney of an African green monkey. - They are used extensively in virology and vaccine production due to their ability to be propagated for many passages. *WI-38* - WI-38 is a **diploid human cell strain** derived from lung tissue. - While they have a finite lifespan similar to primary cells, they represent a **cell strain** that has been subcultured and characterized, with more homogeneous growth characteristics than fresh primary cultures.

Q: What is the primary complication associated with Eale's disease?

Vitreous hemorrhage. ***Vitreous hemorrhage*** - **Vitreous hemorrhage** is a common and often visually debilitating complication of Eale's disease, resulting from the rupture of fragile new vessels. - The proliferative stage of Eale's disease involves the development of **neovascularization** on the retina, which can bleed into the vitreous humor. *Retinal hemorrhage* - While **retinal hemorrhages** can occur in Eale's disease, they are often precursors to or components of vitreous hemorrhage, not the primary, most significant complication. - Retinal hemorrhages alone may cause less severe vision loss compared to the extensive obscuration by vitreous bleeding. *Conjunctival hemorrhage* - **Conjunctival hemorrhage** involves bleeding in the superficial layers of the eye and is not typically associated with the underlying vasculitis of Eale's disease. - This is a benign condition and not a primary complication of a retinal vascular disorder. *Choroidal hemorrhage* - **Choroidal hemorrhage** occurs beneath the retina and is usually associated with trauma, surgery, or degenerative conditions like age-related macular degeneration, not Eale's disease. - Eale's disease primarily affects the **retinal vasculature**, leading to bleeding internally into the vitreous.

Q: Which of the following is the most likely proliferating breast mass?

Fibroadenoma. **Fibroadenoma** - A **fibroadenoma** is a benign **biphasic breast tumor** composed of both glandular and stromal tissue, making it a common proliferating mass [3]. - It is often seen in **young women** and typically presents as a firm, movable, non-tender lump [3]. *Duct ectasia* - **Duct ectasia** is a non-proliferative condition characterized by dilation of the **subareolar ducts**, often with inflammation and fibrosis. - It is more commonly associated with **nipple discharge** and **periductal inflammation** rather than being a primary proliferating mass. *Adenosis* - **Adenosis** refers to an increase in the number of **glands or lobules** within the breast parenchyma, which can be sclerosing or florid [2]. - While it involves increased glandular elements, it is generally considered a **benign proliferative change** and less likely to form a distinct, palpable mass compared to a fibroadenoma [1], [4]. *Papilloma* - A **papilloma** is a benign epithelial proliferation within a **duct**, characterized by a central fibrovascular core [2]. - It commonly presents with **nipple discharge**, often bloody, and is typically a smaller lesion within the ductal system rather than a large, palpable proliferating mass [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1052-1054. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 446-447. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 448-449. [4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, p. 1052.

Q: Which of the following germ cell tumors is benign?

Dermoid cyst. ***Seminoma*** - Seminomas are well-known malignant **germ cell tumors**, primarily affecting young males [2]. - They are associated with elevated **human chorionic gonadotropin (hCG)** and can spread to lymph nodes [3]. *Leydig cell tumor* - These tumors are usually **benign** and arise from Leydig cells in the testes. - While they can produce **testosterone**, they do not typically exhibit malignancy. *Sertoli cell tumor* - Sertoli cell tumors are also generally **benign** and arise from Sertoli cells in the testes. - They lack the malignant behavior seen in seminomas and have a low rate of metastasis [1]. *Dermoid cyst* - Dermoid cysts are **benign** mature teratomas, commonly found in the ovaries or testicles. - They can contain different tissue types (like hair, fat, and teeth) but are not malignant. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 512-513. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 979-980. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 980-982.

Question 1

What is the best indicator of the availability, utilization, and effectiveness of health services?

Accepted Answer

IMR

Answer

MMR

Answer

Hospital bed OCR

Answer

DALY

Question 2

Which of the following statements is true for a left-skewed distribution?

Accepted Answer

Median > Mean

Answer

Mean = Median

Answer

Mean>Mode

Answer

Mean < Mode

Question 3

Raindrop pigmentation is caused by?

Accepted Answer

Arsenic

Answer

Dapsone

Answer

Minocycline

Answer

Clofazimine

Question 4

In nutrient agar the concentration of agar is

Accepted Answer

1.5%

Answer

1%

Answer

3%

Answer

4%

Question 5

What is the correct order of application of reagents in the complete Gram staining procedure?

Accepted Answer

Gentian violet → Iodine → Alcohol/Acetone → Safranin

Answer

Iodine → Gentian violet → Alcohol/Acetone → Safranin

Answer

Safranin → Gentian violet → Iodine → Alcohol/Acetone

Answer

Gentian violet → Alcohol/Acetone → Iodine → Safranin

Question 6

Which virus is primarily responsible for causing Ebola virus disease, a type of hemorrhagic fever?

Accepted Answer

Ebola virus

Answer

Phlebovirus

Answer

West Nile virus

Answer

None of the options

Question 7

Which of the following is a primary cell line?

Accepted Answer

Chick embryo fibroblasts

Answer

Hela cells

Answer

Vero cells

Answer

WI-38

Question 8

What is the primary complication associated with Eale's disease?

Accepted Answer

Vitreous hemorrhage

Answer

Retinal hemorrhage

Answer

Conjunctival hemorrhage

Answer

Choroidal hemorrhage

Question 9

Which of the following is the most likely proliferating breast mass?

Accepted Answer

Fibroadenoma

Answer

Duct ectasia

Answer

Adenosis

Answer

Papilloma

Question 10

Which of the following germ cell tumors is benign?

Accepted Answer

Dermoid cyst

Answer

Seminoma

Answer

Embryonal carcinoma

Answer

Yolk sac tumor

NEET-PG 2012

Community Medicine

Dermatology

Microbiology

Ophthalmology

Pathology