NEET-PG 2015 — Forensic Medicine
47 Previous Year Questions with Answers & Explanations
Which of the following does not refer to a cannabis preparation?
In the context of Indian law, what is the legal classification of the first offense of stalking?
Tache noire de la sclera is a postmortem finding related to which of the following?
Among the following organs, which takes the longest to putrefy in females?
In which condition is adipocere formation most likely to occur?
The characteristic color of adipocere is:
Which of the following statements is true about cadaveric spasm?
Which of the following is not a feature of postmortem staining?
Best temperature for putrefaction is -
What is defined as a negative autopsy?
NEET-PG 2015 - Forensic Medicine NEET-PG Practice Questions and MCQs
Question 1: Which of the following does not refer to a cannabis preparation?
- A. Charas
- B. Afeem (Correct Answer)
- C. Reefer
- D. Sinsemilla
Explanation: ***Afeem*** - **Afeem** is a preparation of **opium**, which is derived from the **opium poppy** (Papaver somniferum), not cannabis. - Opium contains **opiates** like morphine and codeine, which have different psychoactive and pharmacological effects than cannabis. *Charas* - **Charas** is a form of **hashish** made from the resin of the cannabis plant, primarily from Indian cannabis strains. - It involves hand-rubbing the live plant to collect the resin, which is then rolled into balls or sticks. *Reefer* - **Reefer** is a slang term for a **marijuana cigarette** or a **joint**. - It refers to dried cannabis flowers rolled in paper for smoking. *Sinsemilla* - **Sinsemilla** refers to **unpollinated female cannabis plants** that produce a higher concentration of tetrahydrocannabinol (THC). - The term literally means "without seeds" (from Spanish "sin semilla") and is prized for its potency.
Question 2: In the context of Indian law, what is the legal classification of the first offense of stalking?
- A. Cognizable and bailable under Indian law (Correct Answer)
- B. Non-cognizable and bailable under Indian law
- C. Non-cognizable and non-bailable under Indian law
- D. Cognizable and non-bailable under Indian law
Explanation: ***Cognizable and bailable under Indian law*** - Under Section 354D of the **Indian Penal Code (IPC)**, the **first offense** of stalking is classified as **cognizable and bailable**. - **Cognizable** means a police officer can arrest the accused without a warrant and begin investigation without magistrate's permission. - **Bailable** means the accused has an automatic right to be released on bail. - First offense carries punishment of imprisonment up to **3 years** and fine. - **Note:** Subsequent offenses become **non-bailable** with imprisonment up to 5 years. *Non-cognizable and bailable under Indian law* - This is incorrect as the first offense of stalking is **cognizable**, not non-cognizable. - If it were non-cognizable, police would require a **magistrate's order** to investigate and arrest. *Non-cognizable and non-bailable under Indian law* - Both classifications are incorrect for the first offense. - The first offense of stalking is **cognizable and bailable**, not non-cognizable and non-bailable. *Cognizable and non-bailable under Indian law* - While correctly identifying the cognizable nature, this incorrectly classifies the first offense as non-bailable. - **Non-bailable** classification applies only to **subsequent offenses** of stalking under Section 354D IPC. - For first offense, bail is a matter of right, not court discretion.
Question 3: Tache noire de la sclera is a postmortem finding related to which of the following?
- A. The eye (Correct Answer)
- B. Muscle tissue
- C. Hair follicles
- D. Skin
Explanation: ***The eye*** - **Tache noire de la sclera** is a postmortem phenomenon characterized by a **black spot on the sclera**, resulting from the drying out of the globe after death. - This finding is important in **forensic pathology** as it can help in estimating the postmortem interval if the eyes are open. *Muscle tissue* - Postmortem changes in muscle tissue include **rigor mortis** (stiffening of muscles) and **livor mortis** (discoloration of skin due to blood pooling), neither of which are described as "tache noire de la sclera." - These changes relate to muscle biochemistry and gravity, not specific changes to the sclera. *Hair follicles* - Hair follicles are not associated with "tache noire de la sclera." Postmortem changes related to hair would involve **hair growth assessment** or decomposition changes affecting the scalp. - The phenomenon described is specific to ocular structures. *Skin* - While skin shows prominent postmortem changes such as **livor mortis**, **marbling**, and **decomposition**, these are distinct from tache noire de la sclera. - Tache noire specifically refers to the **drying and darkening of the exposed sclera**, not cutaneous changes.
Question 4: Among the following organs, which takes the longest to putrefy in females?
- A. Hair
- B. Bone
- C. Uterus (Correct Answer)
- D. Cartilage
Explanation: ***Uterus*** - The **uterus** (particularly the **pregnant/gravid uterus**) is the organ that takes the **longest to putrefy in females**. - This is due to its **thick muscular walls** and **dense fibrous tissue composition**, making it highly resistant to bacterial degradation and putrefaction. - The uterus maintains its structural integrity post-mortem significantly longer than other organs, which is a classical teaching in forensic medicine. - In males, the analogous organ is the **prostate gland**. *Hair* - **Hair is composed primarily of keratin**, a protein highly resistant to decay and can persist for very long periods. - However, hair is **not an organ** but rather an appendage/derivative of skin, and the question specifically refers to organs. - While hair resists decomposition exceptionally well, it doesn't qualify as an answer to this question. *Bone* - Although bones are very durable and can persist for centuries, they undergo decomposition through the action of **microorganisms and environmental factors**. - **Bone decomposition** involves degradation of organic components (collagen, proteins), while the mineral matrix (hydroxyapatite) remains stable longer. - Bones are slower to decompose than most soft tissues but faster than the uterus in the context of putrefaction. *Cartilage* - Cartilage is a **relatively resistant connective tissue** due to its avascular nature and dense extracellular matrix. - However, it is still susceptible to **enzymatic breakdown and bacterial action** during decomposition. - Cartilage degrades faster than the dense muscular tissue of the uterus.
Question 5: In which condition is adipocere formation most likely to occur?
- A. Dead body exposed to air
- B. Dead body buried in damp, clay soil (Correct Answer)
- C. Burial in dry hot air
- D. None of the options
Explanation: **Dead body buried in damp, clay soil** - **Adipocere formation**, also known as "grave wax," is a post-mortem change where **body fats** hydrolyze into fatty acids and ammonia, forming a waxy, soap-like substance. - This process requires specific conditions: a **moist, anaerobic environment**, and temperatures above freezing, often found in **damp, clay soil** or submerged in water. *Dead body exposed to air* - Exposure to air promotes **putrefaction** (decomposition by bacteria and enzymes) and **mummification** (drying out of tissues), rather than adipocere formation. - An **aerobic environment** does not support the chemical reactions necessary for fat hydrolysis into adipocere. *Burial in dry hot air* - High temperatures and dry air promote **desiccation** and **mummification**, leading to the preservation of tissues by drying. - The lack of moisture in a dry environment inhibits the hydrolysis of fats required for adipocere formation. *None of the options* - This option is incorrect because the conditions described in "Dead body buried in damp, clay soil" are ideal for adipocere formation.
Question 6: The characteristic color of adipocere is:
- A. Grayish white (Correct Answer)
- B. Black
- C. Brown
- D. Red
Explanation: ***Grayish white*** - Adipocere, also known as **grave wax**, is a waxy substance formed during the decomposition of a body in specific environmental conditions. - Its characteristic appearance is that of a **grayish-white, greasy, or crumbly** material, resulting from the hydrolysis and hydrogenation of body fats. *Black* - A **black discoloration** in a decomposing body is typically associated with **putrefaction** and the formation of **sulfmethemoglobin**, not adipocere formation. - This indicates a different stage and process of decomposition, usually in the presence of oxygen and bacterial activity. *Brown* - **Brown discoloration** can be seen in various stages of decomposition due to the breakdown of blood pigments, but it is not the characteristic color of **adipocere**. - Adipocere's formation involves the transformation of fat into fatty acids, giving it a distinct pale color. *Red* - **Red discoloration** is generally associated with fresh blood or **carbon monoxide poisoning (cherry-red lividity)** in a deceased body. - It is not a feature of adipocere formation, which involves chemical changes to body fat over a longer period.
Question 7: Which of the following statements is true about cadaveric spasm?
- A. Occurs immediately at the moment of death. (Correct Answer)
- B. May develop several hours after death.
- C. Develops only in certain muscle groups.
- D. Can affect any muscle in the body.
Explanation: ***Occurs immediately at the moment of death.*** - **Cadaveric spasm** is a rare form of muscle stiffening that occurs **instantly** at the moment of death, without the flaccid stage seen in rigor mortis. - This is the **primary defining characteristic** that distinguishes cadaveric spasm from all other postmortem changes. - It is typically associated with deaths involving **intense emotional stress**, fear, or extreme physical exertion just before death. *May develop several hours after death.* - This statement describes **rigor mortis**, which is the stiffening of muscles that typically begins 2-6 hours after death. - Cadaveric spasm is distinct from rigor mortis due to its **immediate onset**. *Develops only in certain muscle groups.* - While this statement has some validity (cadaveric spasm is typically **localized** to specific muscle groups like hands or limbs that were under extreme tension), it is not the **best answer**. - The key distinguishing feature of cadaveric spasm is its **immediate onset at death**, not merely its localized distribution. - Many postmortem changes can be localized; what makes cadaveric spasm unique is its instantaneous occurrence. *Can affect any muscle in the body.* - This is too broad and inaccurate. Cadaveric spasm is characteristically **localized or regional**, not generalized. - It typically involves muscles that were under **extreme voluntary contraction** at the moment of death (e.g., clutching a weapon, grasping an object). - Unlike rigor mortis, which eventually affects all muscles, cadaveric spasm remains confined to specific muscle groups.
Question 8: Which of the following is not a feature of postmortem staining?
- A. Common in dependent part
- B. Appears uniformly throughout the body
- C. Occurs immediately after death (Correct Answer)
- D. Margins are sharp
Explanation: ***Occurs immediately after death*** - **Livor mortis** (postmortem staining/lividity) does NOT occur immediately after death - it typically begins **20-30 minutes** after death and becomes fully developed within **6-12 hours** - This is the correct answer as it represents a feature that is NOT characteristic of postmortem staining - The delay occurs because it takes time for blood to settle in capillaries due to gravity after circulation stops *Common in dependent part* - This IS a hallmark feature of postmortem staining - Gravity causes blood to pool in the **lowest parts of the body** (dependent areas) - Areas of pressure (where body contacts surface) appear pale due to **capillary compression** *Appears uniformly throughout the body* - This is also NOT a feature of postmortem staining (could be considered another correct answer) - Postmortem staining is **localized to dependent areas**, not uniform throughout - The distribution pattern helps determine body position after death in forensic investigations *Margins are sharp* - Postmortem lividity typically has **ill-defined, diffuse margins** rather than sharp borders - The transition between affected and unaffected areas is gradual - However, this is less definitively wrong compared to the timing and uniformity statements
Question 9: Best temperature for putrefaction is -
- A. 0-10 °C
- B. 45-100 °C
- C. 100-150 °C
- D. 10-45 °C (Correct Answer)
Explanation: ***10-45 °C*** - This temperature range is optimal for the **bacterial and enzymatic activity** required for putrefaction, as most decomposition bacteria thrive in mesophilic conditions. - Temperatures within this range accelerate the breakdown of complex organic matter into simpler compounds, leading to the characteristic changes of **decomposition**. *0-10 °C* - Temperatures below 10°C significantly **slow down bacterial metabolism** and enzymatic activity, thereby retarding the process of putrefaction. - At temperatures near 0°C, decomposition is almost entirely halted due to **cold preservation** effects. *45-100 °C* - Temperatures above 45°C can begin to **denature enzymes** and kill many of the bacteria responsible for putrefaction, especially as temperatures approach the upper end of this range. - While some thermophilic bacteria exist, the overall rate of decomposition for a cadaver typically **decreases at very high temperatures** due to sterilization effects or protein coagulation. *100-150 °C* - At these very high temperatures, most **bacteria would be destroyed**, and enzymatic activity would be completely inhibited due to extensive protein denaturation. - Such temperatures are more likely to cause **cremation or desiccation** rather than putrefaction.
Question 10: What is defined as a negative autopsy?
- A. Cause is apparent on gross examination but not on histopathological examination.
- B. Gross findings are minimal.
- C. Cause is apparent on gross examination but not found due to constraints on the part of the doctor.
- D. No cause of death is found after both gross and histopathological examination. (Correct Answer)
Explanation: ***No cause of death is found after both gross and histopathological examination.*** - A **negative autopsy** is declared when comprehensive examination, including both macroscopic (gross) and microscopic (histopathological) assessment, fails to identify a definitive **cause of death**. - This outcome can be due to various reasons, such as death from **functional disturbances** (e.g., arrhythmias, metabolic imbalances) or processes not evident morphologically. *Cause is apparent on gross examination but not on histopathological examination.* - This scenario describes situations where a cause might be evident visually (e.g., a large hemorrhage) but further microscopic investigation is still needed for confirmation or detailed understanding. - It does not align with a "negative" autopsy, as a cause has already been *grossly identified*. *Gross findings are minimal.* - While minimal gross findings might precede a negative autopsy, this statement alone is insufficient to define it. - A negative autopsy specifically requires the absence of a cause of death even after subsequent **histopathological examination**. *Cause is apparent on gross examination but not found due to constraints on the part of the doctor.* - This option refers to a failure in diagnostic process due to external factors or limitations by the examiner, not an inherent lack of discernible cause. - It suggests a missed diagnosis, not that a cause could not be found through comprehensive investigation.