NEET-PG 2013 - Forensic Medicine Practice Questions

Q: Which of the following snakes is MOST known for venom containing neurotoxins?

Krait. ***Krait*** - Kraits (Bungarus species) are **MOST known for pure neurotoxic venom** with minimal or no local effects at the bite site. - Their venom contains **presynaptic and postsynaptic neurotoxins**, causing classic features of **flaccid paralysis**, ptosis, and respiratory failure. - **Clinical hallmark**: Often described as the prototype of **pure neurotoxic envenomation** with absent local signs (no swelling, no pain). - Among Indian snakes, kraits have the **highest case fatality rate** due to potent neurotoxicity. *Cobra* - Cobras (Naja species) do have **neurotoxic venom** causing paralysis and respiratory failure. - However, cobra venom contains **significant cytotoxic components** causing marked **local tissue necrosis**, pain, and swelling at the bite site. - This mixed venom profile (neurotoxic + cytotoxic) makes it less "purely" neurotoxic compared to kraits. *Sea snake* - Sea snakes have neurotoxic venom causing myotoxicity and paralysis. - Bites are **rare** due to limited human contact and docile nature. - Not as clinically recognized in Indian medical practice compared to terrestrial elapids. *Viper* - Vipers (Russell's viper, Saw-scaled viper) have predominantly **hemotoxic and cytotoxic venom**. - Cause **coagulopathy**, hemorrhage, tissue necrosis, and acute kidney injury. - **Not neurotoxic** - this is the key differentiating feature from elapids (kraits, cobras).

Q: Cobras belong to:

Elapidae. ***Elapidae*** - The family **Elapidae** includes cobras, mambas, kraits, and coral snakes, all of which are recognized by their **fixed front fangs** and potent neurotoxic venom. - Elapid venom typically affects the **nervous system**, causing paralysis and respiratory failure. *Colubridae* - This is the **largest snake family**, but most species are **non-venomous** or have mild venom and rear-fanged dentition. - Examples include rat snakes, garter snakes, and king snakes, which are generally not considered as dangerous as elapids. *Boidae* - Boidae are a family of **non-venomous, constricting snakes** that include boas, pythons, and anacondas. - They kill their prey by **suffocation** rather than venom. *Viperidae* - This family includes vipers and pit vipers, characterized by their **long, hinged fangs** that fold back when not in use. - Their venom is often **hemotoxic**, causing tissue damage and bleeding, and includes species like rattlesnakes and adders.

Q: Among the following countries, the first systematic fingerprint identification service was established in:

India. ***India*** - The **first systematic fingerprint identification service** was established in **Calcutta (now Kolkata), India in 1897** by Sir Edward Henry while he was Inspector General of Police in Bengal. - Henry developed the **Henry Classification System** in India, which became the standard fingerprint classification method worldwide. - This preceded the establishment of similar services in other countries, making it the first organized, systematic fingerprint bureau for criminal identification. *England* - England established its fingerprint bureau at **Scotland Yard in 1901**, four years after India. - Sir Edward Henry, who had developed the system in India, became Commissioner of the Metropolitan Police and established the Fingerprint Branch in London. - While England popularized fingerprint identification globally, it was not the first to establish a systematic service. *China* - **Ancient China** has historical evidence of using fingerprints on documents and clay seals for identification purposes dating back thousands of years. - However, this was not a systematic, scientific service for criminal identification in the modern sense with a classification system and organized bureau. *Singapore* - Singapore's forensic services, including fingerprint identification, developed later in the 20th century. - It followed the advancements pioneered by India and England and was not among the first countries to establish such services.

Q: 'Phossy jaw' is seen in chronic poisoning with:

Phosphorus. ***Phosphorus*** - **"Phossy jaw"** refers to the severe osteonecrosis of the jaw, historically seen in workers exposed to **white or yellow phosphorus**, particularly in the matchstick industry. - Exposure to **elemental phosphorus** leads to the destruction of bone tissue, infection, and eventually necrosis of the jawbone. *Arsenic* - Chronic arsenic poisoning primarily affects the **skin (hyperkeratosis, hyperpigmentation)**, and multiple organ systems. - It is not associated with **osteonecrosis of the jaw**. *Thallium* - Thallium poisoning is characterized by **alopecia**, **neuropathy**, and gastrointestinal symptoms. - It does not cause **"phossy jaw"**. *Datura* - Datura refers to a genus of plants containing **tropane alkaloids**, which cause anticholinergic toxidrome. - Symptoms include **dilated pupils**, dry mouth, hallucinations, and tachycardia, not jaw necrosis.

Q: What is the characteristic pupil condition seen in opium poisoning?

Miosis. ***Miosis*** - **Opioids** stimulate mu-opioid receptors in the brainstem, leading to increased parasympathetic outflow to the **oculomotor nerve**. - This stimulation causes constriction of the **pupillary sphincter muscle**, resulting in pinpoint pupils. *Mydriasis* - **Mydriasis** (dilated pupils) is typically caused by anticholinergic agents, sympathetic stimulation, or certain stimulants, which are not characteristic of opium poisoning. - While dilated pupils can occur in severe terminal hypoxia due to brainstem damage, this is not the initial or characteristic presentation of opioid toxicity. *No change* - **Opioid poisoning** reliably causes a distinct pupillary response, making "no change" an incorrect option for characteristic presentation. - The pupillary response is a crucial diagnostic sign for opioid intoxication. *Irregular* - **Irregular pupils** (dyscoria) are usually associated with direct ocular trauma, neurological conditions affecting specific parts of the iris, or certain inflammatory conditions of the eye. - This is not a typical finding in **opioid toxicity**, which causes symmetrically constricted pupils.

Q: Hurt is defined under section:

319 IPC. ***319 IPC*** - Section **319 of the Indian Penal Code (IPC)** defines the term "hurt" as causing bodily pain, disease, or infirmity to any person. - This section lays the foundational legal definition, distinguishing simple hurt from grievous hurt. *320 IPC* - Section 320 of the IPC defines **"grievous hurt"**, listing eight specific types of injuries considered severe. - This section details more serious injuries, such as emasculation, permanent privation of sight, or fracture of a bone, which are distinct from simple hurt. *321 IPC* - Section 321 of the IPC deals with **"voluntarily causing hurt"**, which is the act of intentionally causing hurt to someone. - This section describes the mental element (intention) required for the offense of causing hurt. *323 IPC* - Section 323 of the IPC prescribes the **punishment for voluntarily causing hurt**, which is imprisonment for a term that may extend to one year, or with fine up to one thousand rupees, or both. - This section outlines the legal consequence for the act of voluntarily causing simple hurt, rather than defining hurt itself.

Q: Not seen in fingerprints:

Grid pattern. ***Grid pattern*** - **Grid patterns** are not a characteristic ridge pattern found in human fingerprints. Fingerprints are formed by epidermal ridges that follow specific, identifiable patterns. - The primary patterns of fingerprints are **loops, whorls, and arches**, which are used for classification and identification. *Whorl* - A **whorl** is one of the three basic fingerprint patterns, characterized by circular or spiral ridges. - Whorls are a common and identifiable feature used in **dermatoglyphics** for fingerprint analysis. *Loop* - A **loop** is the most common fingerprint pattern, characterized by ridges that enter from one side, curve around, and exit from the same side. - **Loops** are a fundamental pattern recognized in forensic science for fingerprint classification. *Arch* - An **arch** is the simplest fingerprint pattern, characterized by ridges that enter from one side, rise in the middle, and exit from the opposite side without forming loops or deltas. - **Arches** are one of the three primary patterns used to classify fingerprints.

Q: In criminal cases, conduct money is paid by:

No conduct money is given. ***No conduct money is given*** - In most criminal law systems, **witnesses compelled to testify** by the prosecution are generally not entitled to conduct money. - The state bears the cost of investigation and prosecution, and witnesses are expected to cooperate in the interest of justice. - This is in contrast to civil cases where the party calling the witness typically pays conduct money for their attendance. *Court* - The court itself does not typically pay conduct money to witnesses in criminal cases. - While it oversees the legal process, the financial aspects of witness appearance are usually handled by the parties involved or the state. *Judge* - A **judge** does not personally disburse funds for conduct money. - The judge's role is to preside over the trial and ensure due process, not to manage financial transactions related to witnesses. *Opposing party* - The opposing party (typically the defense) also does not pay conduct money to witnesses testifying for the prosecution in a criminal case. - If the defense calls its own witnesses, their appearance costs would be a matter for the defense, but this differs significantly from the concept of conduct money in civil cases.

Q: Which of the following is NOT a characteristic feature of close-range shotgun wounds?

Beveling of bone at exit wound. ***Beveling of bone at exit wound*** - **Beveling of bone is NOT a characteristic feature specific to close-range shotgun wounds** - Beveling relates to the **projectile-bone interaction** and the mechanics of bone perforation, not the range of fire - **Internal (exit) beveling** occurs when the projectile creates a cone-shaped defect as it exits the bone, occurring at **any firing distance** when bone is perforated - This is a feature determined by **projectile trajectory and energy**, not by whether the wound is close-range or distant *Contact wound with stellate laceration* - This is **highly characteristic** of contact or very close-range shotgun wounds (muzzle pressed against skin) - The **hot gases expand beneath the skin** causing irregular, star-shaped (stellate) tearing - Classic forensic finding in contact shotgun wounds *Powder tattooing around entry wound* - **Powder tattooing (stippling) IS characteristic** of close-range shotgun wounds - Occurs at **intermediate range (typically 6 inches to 3 feet)** where unburnt powder grains embed in the skin - Creates a characteristic pattern of small abrasions and contusions around the entry wound - Absent only in contact wounds (powder driven into wound) or distant wounds (powder disperses) *Abrasion collar around entry wound* - **Abrasion collar IS characteristic** of close-range shotgun wounds (and most gunshot wounds) - Results from the **bullet or pellets abrading the skin** as they enter - Creates a rim of scraped epidermis around the wound margin - Present in both close-range and distant shotgun wounds

Q: Which parameter in vitreous humor is most commonly used to estimate the time since death?

K+ level. ***K+ level*** - After death, cell membranes lose their integrity, leading to a steady leakage of **potassium ions** from intracellular to extracellular compartments, including the vitreous humor. - The rate of increase in **vitreous potassium** is relatively predictable and is thus a reliable indicator for estimating the **post-mortem interval (PMI)**. *Urea level* - While urea is present in vitreous humor, its post-mortem changes are not as consistent or well-defined for precise **PMI estimation** compared to potassium. - Urea levels are more influenced by pre-mortem renal function and other physiological factors, making it less reliable. *Na+ level* - **Sodium ion** concentrations in the vitreous humor tend to be relatively stable after death for a longer period compared to potassium. - The changes are not as pronounced or as linearly progressive as potassium, making it a less accurate marker for early **PMI estimation**. *Glucose level* - **Vitreous glucose** levels decrease rapidly after death due to continued glycolysis by residual cells and microorganisms. - While the decrease is significant, it's highly variable and influenced by factors like environmental temperature and bacterial contamination, making it less consistent for precise **PMI estimation**.

Question 1

Which of the following snakes is MOST known for venom containing neurotoxins?

Accepted Answer

Krait

Answer

Sea snake

Answer

Cobra

Answer

Viper

Question 2

Cobras belong to:

Accepted Answer

Elapidae

Answer

Colubridae

Answer

Boidae

Answer

Viperidae

Question 3

Among the following countries, the first systematic fingerprint identification service was established in:

Accepted Answer

India

Answer

England

Answer

China

Answer

Singapore

Question 4

'Phossy jaw' is seen in chronic poisoning with:

Accepted Answer

Phosphorus

Answer

Arsenic

Answer

Thallium

Answer

Datura

Question 5

What is the characteristic pupil condition seen in opium poisoning?

Accepted Answer

Miosis

Answer

Mydriasis

Answer

No change

Answer

Irregular

Question 6

Hurt is defined under section:

Accepted Answer

319 IPC

Answer

320 IPC

Answer

321 IPC

Answer

323 IPC

Question 7

Not seen in fingerprints:

Accepted Answer

Grid pattern

Answer

Whorl

Answer

Loop

Answer

Arch

Question 8

In criminal cases, conduct money is paid by:

Accepted Answer

No conduct money is given

Answer

Court

Answer

Judge

Answer

Opposing party

Question 9

Which of the following is NOT a characteristic feature of close-range shotgun wounds?

Accepted Answer

Beveling of bone at exit wound

Answer

Contact wound with stellate laceration

Answer

Abrasion collar around entry wound

Answer

Powder tattooing around entry wound

Question 10

Which parameter in vitreous humor is most commonly used to estimate the time since death?

Accepted Answer

K+ level

Answer

Urea level

Answer

Na+ level

Answer

Glucose level

NEET-PG 2013 — Forensic Medicine