NEET-PG 2014 - Forensic Medicine Practice Questions

Q: Which of the following is a characteristic feature of animal hair?

Thick medulla. ***Correct: Thick medulla*** - **Thick, continuous medulla** is the most reliable and characteristic feature for distinguishing **animal hair from human hair** in forensic examination - **Medullary index** (ratio of medulla diameter to hair shaft diameter) is the key differentiating factor: - **Animal hair**: Medullary index **>0.50** (usually **>0.33**), with continuous or prominent medulla - **Human hair**: Medullary index **<0.33**, with discontinuous, fragmented, or absent medulla - This feature is consistently used in **forensic hair comparison** and is more reliable than scale patterns alone *Incorrect: Large scales* - While **animal hairs** can have distinctive **cuticle scale patterns** (imbricate, coronal, or spinous patterns), scale size and pattern alone are **not the most characteristic feature** - Scale patterns can vary significantly among different animal species and overlap with some human hair characteristics - **Scale examination** is supplementary but not the primary distinguishing feature *Incorrect: Fine texture* - **Texture is highly variable** across different animal species and is not a reliable distinguishing characteristic - Animal hair texture ranges from very fine (cat, rabbit) to very coarse (horse, cattle) - Texture cannot be used as a standalone feature to differentiate animal from human hair *Incorrect: Thin diameter* - **Hair diameter varies greatly** among different animal species and cannot serve as a consistent distinguishing feature - Some animal hairs are much **thicker** than human hair (e.g., horse, bear), while others may be comparatively thin - Diameter alone is unreliable without considering the medullary index

Q: Cadmium causes:

Proximal tubular necrosis. ***Proximal tubular necrosis*** - **Cadmium** preferentially accumulates in the **renal proximal tubules**, leading to direct cellular damage and necrosis. - This toxicity is a hallmark of chronic cadmium exposure, impairing the kidney's ability to reabsorb essential substances. *Polyneuritis* - **Polyneuritis** is a condition of widespread inflammation of multiple peripheral nerves, often associated with toxins like **lead** or certain medications, but not specifically cadmium. - Its primary manifestation involves sensory and motor deficits in the limbs, which is not characteristic of cadmium poisoning. *Distal tubular necrosis* - While cadmium affects the kidneys, its primary site of toxicity is the **proximal tubule**, not the distal tubule. - Different toxins or conditions, such as **ethylene glycol** overdose, are more likely to cause distal tubular necrosis. *Cirrhosis* - **Cirrhosis** is advanced scarring of the liver and is primarily associated with chronic alcohol abuse, viral hepatitis, or fatty liver disease. - Cadmium accumulation can have some hepatic effects but does not typically lead to significant cirrhosis as its main manifestation.

Q: Active principle of oleander plant is:

Oleandrin. ***Oleandrin*** - **Oleandrin** is a highly toxic **cardiac glycoside** found in all parts of the oleander plant (*Nerium oleander*). - It exerts its effects by inhibiting the **Na+/K+-ATPase pump**, similar to digoxin, leading to cardiotoxicity. *Atropine* - **Atropine** is an anticholinergic alkaloid derived from plants like *Atropa belladonna* (deadly nightshade), not oleander. - It blocks **muscarinic acetylcholine receptors**, causing effects such as pupil dilation, dry mouth, and increased heart rate. *Cannabinol* - **Cannabinol (CBN)** is a cannabinoid found in the *Cannabis* plant, formed from the degradation of THC. - It has psychoactive properties, but is not present in oleander. *Semicarpol* - **Semicarpol** is a chemical compound found in plants like *Anacardium occidentale* (cashew tree) and *Rhus semialata*. - It is not an active principle of the oleander plant.

Q: In stab wounds, Langer's lines determine:

Wound edge separation. ***Wound edge separation*** - Langer's lines, or **cleavage lines**, represent the orientation of collagen fiber bundles in the dermis. - In **stab wounds**, these lines directly determine the **degree of wound gaping** (edge separation). - Wounds **perpendicular to Langer's lines** gape widely due to tension from collagen fibers pulling the wound edges apart. - Wounds **parallel to Langer's lines** show minimal gaping as they run along the fiber orientation. - This principle is crucial in **forensic medicine** for wound analysis and in **surgery** for planning incisions. *Healing* - While Langer's lines influence healing quality and scarring, they don't directly "determine" healing in stab wounds. - The primary immediate effect is wound gaping, not the healing process itself. - Better healing with parallel incisions is a secondary benefit, not the primary determinant. *Tissue displacement* - Tissue displacement refers to movement of tissues during injury or manipulation. - Langer's lines indicate preferred directions to minimize displacement but don't directly determine it. *Direction* - Langer's lines define the intrinsic **orientation of collagen bundles** in the skin. - They do not determine the direction of the stab wound itself, but rather how the wound behaves based on its orientation relative to these lines.

Q: Scorpion venom resembles venom of -

Cobra. ***Cobra*** - Both scorpion venom and cobra venom contain **neurotoxins** that affect the nervous system, making this the closest resemblance among the given options. - Scorpion venom contains neurotoxins that act on **sodium and potassium channels**, causing neuromuscular effects, though it also produces unique **autonomic effects** (both cholinergic and adrenergic) not typical of cobra venom. - Cobra venom primarily contains **postsynaptic neurotoxins** that block acetylcholine receptors at the neuromuscular junction, causing flaccid paralysis and respiratory depression. - Among the options, cobra represents the best match due to the shared **neurotoxic** component. *Viper* - Viper venom is predominantly **hemotoxic and cytotoxic**, causing local tissue damage, bleeding, and coagulation abnormalities. - Contains enzymes like **phospholipase A2** and metalloproteases that cause vasculotoxicity and anticoagulation - completely different from scorpion venom's mechanism. *Krait* - While krait venom is also **neurotoxic**, it primarily acts at **presynaptic terminals** causing irreversible neuromuscular blockade. - The mechanism differs from scorpion venom, which acts primarily on ion channels and produces prominent autonomic manifestations not seen with krait envenomation. *All of the options* - This is incorrect because viper venom's **hemotoxic effects** are fundamentally different from scorpion venom's **neurotoxic effects**. - While both cobra and krait share neurotoxicity with scorpion venom, the closest resemblance is with **cobra** among the given options.

Q: Causing miscarriage is punishable under which IPC:

Sec 312 IPC. ***Sec 312 IPC*** - This section of the Indian Penal Code specifically deals with **causing miscarriage** and outlines the penalties for such acts. - It differentiates between miscarriage caused with or without the **woman's consent**, and also considers if the act is performed in **good faith** to save the woman's life. *Sec 320 IPC* - This section defines "grievous hurt," which includes severe injuries leading to permanent disability or life-threatening conditions. - While miscarriage can be a severe outcome, **Sec 320** focuses on the nature of the injury to the person rather than the specific act of causing miscarriage. *Sec 311 IPC* - This section pertains to **causing miscarriage of a child quick with child** without the consent of the woman and without good faith to save her life. - It carries a harsher punishment than Sec 312 because it involves a fetus that is considered more developed and near viability. *Sec 314 IPC* - This section deals with the **death caused by an act done with intent to cause miscarriage**. - It applies when a person commits an act to cause miscarriage, and as a result, the woman dies, even if the intent was not to cause her death.

Q: Sections 312 to 316 deal with:

Causing miscarriage. ***Causing miscarriage*** - Sections 312 to 316 of the **Indian Penal Code (IPC)** specifically deal with offenses related to causing **miscarriage** and injuries to unborn children. - These sections define acts like voluntarily causing a woman with child to miscarry, causing the death of a quick unborn child by an act amounting to culpable homicide, and causing grievous hurt to a child in the womb. *Kidnapping and abduction* - These offenses are covered under **Sections 359 to 374** of the IPC. - **Kidnapping** involves taking someone without consent from lawful guardianship, while **abduction** involves compelling a person to go from one place to another by force or deceit. *Abetment to suicide* - This offense is addressed under **Section 306** of the IPC. - It deals with the act of instigating, encouraging, or assisting someone to commit **suicide**. *Causing grievous hurt* - The definition and punishment for **causing grievous hurt** are found in **Sections 320 to 326B** of the IPC. - **Grievous hurt** is a specific type of serious injury, such as emasculation, permanent privation of the sight of either eye, or fracture or dislocation of a bone.

Q: Which snake's venom is most likely to cause paralysis accompanied by convulsions?

Krait. ***Krait*** - Krait venom is primarily **neurotoxic**, leading to **flaccid paralysis** due to presynaptic blockage of acetylcholine release at the neuromuscular junction. - While paralysis is the hallmark, some krait species' venom components can also cause central nervous system effects, potentially leading to **convulsions** in severe envenomation. *Vipers* - Viper venoms are predominantly **hemotoxic**, causing **coagulopathy**, tissue necrosis, and acute kidney injury. - They do not typically cause paralysis or convulsions, though some may have minor neurotoxic components. *Sea snakes* - Sea snake venoms are potent **neurotoxins** that cause **muscle paralysis** by blocking acetylcholine receptors. - However, they are less commonly associated with convulsions compared to some krait envenomations. *Cobra* - Cobra venom is also mainly **neurotoxic**, leading to **flaccid paralysis** and respiratory failure. - Unlike krait venom, cobra venom is less frequently associated with convulsions, with paralysis being the dominant neurological symptom.

Q: Non-consensual sodomy is punishable under:

Sec. 377 IPC. ***Sec. 377 IPC*** - **Historically correct answer**: At the time of NEET 2014, **Section 377 IPC** was commonly cited for non-consensual sodomy, as it criminalized "carnal intercourse against the order of nature." - **Important legal update**: The **Criminal Law (Amendment) Act, 2013** expanded the definition of rape under **Section 375 IPC** to include all forms of non-consensual penetrative sexual assault (vaginal, oral, urethral, or anal penetration), effectively bringing non-consensual sodomy under the rape provisions. - **Current position**: While the Supreme Court in **Navtej Singh Johar v. Union of India (2018)** decriminalized consensual homosexual acts, **non-consensual sodomy remains punishable** under **Sections 375/376 IPC** (as rape) and potentially under Section 377 for specific contexts. - For this historical PYQ, Section 377 was the accepted answer, though modern prosecutions typically use Section 376. *Sec. 375 IPC* - **Section 375 IPC** defines **rape**, and post-2013 amendment, it explicitly includes non-consensual anal penetration (sodomy). - The expanded definition covers penetration "to any extent" of vagina, urethra, anus, or mouth, or any object insertion. - This makes it the primary section for prosecuting non-consensual sodomy in current practice. *Sec. 376 IPC* - **Section 376 IPC** provides the **punishment for rape** as defined under Section 375. - Post-2013, this section is frequently used to punish non-consensual sodomy cases. - Punishment ranges from 7 years to life imprisonment depending on circumstances. *Sec. 354 IPC* - **Section 354 IPC** addresses **assault or criminal force with intent to outrage modesty** of a woman. - This is a lesser offense involving inappropriate touching or gestures, not penetrative sexual assault. - Not applicable to non-consensual sodomy cases.

Q: All are true regarding muscular changes after death, except:

Rigor mortis involves involuntary muscles. ***Rigor mortis involves involuntary muscles*** - This statement is **false** because **rigor mortis primarily affects voluntary (skeletal) muscles**, not involuntary muscles like those of the heart or intestines. - The stiffness experienced during rigor mortis is due to the irreversible cross-linking of actin and myosin in skeletal muscle fibers. *Rigor mortis begins 1-2 hours after death* - This statement is **true** as rigor mortis typically begins in the smaller muscles (e.g., face, fingers) around **1-2 hours after death**. - It then progresses to larger muscle groups, reaching its peak stiffness generally within 8-12 hours post-mortem. *Cadaveric spasm involves voluntary muscles* - This statement is **true**. **Cadaveric spasm** (or instantaneous rigor) is a rare phenomenon affecting **voluntary muscles** at the moment of death. - It often occurs in circumstances of extreme emotional stress or violent death and can fix the body in a specific position, like holding a weapon. *Rigor mortis is absent in infants* - This statement is **true**. Rigor mortis is usually **less pronounced or even absent in infants** due to their smaller muscle mass and lower glycogen stores. - While it can occur, it may be fleeting and less noticeable compared to adults.

Question 1

Which of the following is a characteristic feature of animal hair?

Accepted Answer

Thick medulla

Answer

Fine texture

Answer

Thin diameter

Answer

Large scales

Question 2

Cadmium causes:

Accepted Answer

Proximal tubular necrosis

Answer

Polyneuritis

Answer

Distal tubular necrosis

Answer

Cirrhosis

Question 3

Active principle of oleander plant is:

Accepted Answer

Oleandrin

Answer

Atropine

Answer

Cannabinol

Answer

Semicarpol

Question 4

In stab wounds, Langer's lines determine:

Accepted Answer

Wound edge separation

Answer

Tissue displacement

Answer

Healing

Answer

Direction

Question 5

Scorpion venom resembles venom of -

Accepted Answer

Cobra

Answer

Viper

Answer

Krait

Answer

All of the options

Question 6

Causing miscarriage is punishable under which IPC:

Accepted Answer

Sec 312 IPC

Answer

Sec 320 IPC

Answer

Sec 311 IPC

Answer

Sec 314 IPC

Question 7

Sections 312 to 316 deal with:

Accepted Answer

Causing miscarriage

Answer

Kidnapping and abduction

Answer

Abetment to suicide

Answer

Causing grievous hurt

Question 8

Which snake's venom is most likely to cause paralysis accompanied by convulsions?

Accepted Answer

Krait

Answer

Vipers

Answer

Sea snakes

Answer

Cobra

Question 9

Non-consensual sodomy is punishable under:

Accepted Answer

Sec. 377 IPC

Answer

Sec. 375 IPC

Answer

Sec. 376 IPC

Answer

Sec. 354 IPC

Question 10

All are true regarding muscular changes after death, except:

Accepted Answer

Rigor mortis involves involuntary muscles

Answer

Rigor mortis begins 1-2 hours after death

Answer

Cadaveric spasm involves voluntary muscles

Answer

Rigor mortis is absent in infants

NEET-PG 2014 — Forensic Medicine