Biochemistry
1 questionsMechanism of cyanide poisoning is by inhibiting:
NEET-PG 2013 - Biochemistry NEET-PG Practice Questions and MCQs
Question 1451: Mechanism of cyanide poisoning is by inhibiting:
- A. Mitochondrial DNA synthesis
- B. ATP production
- C. Electron transport chain
- D. Cytochrome oxidase (Correct Answer)
Explanation: ***Cytochrome oxidase*** - Cyanide poisoning works by **irreversibly binding** to the ferric ion (Fe3+) in **cytochrome c oxidase** (Complex IV) of the electron transport chain. - This binding prevents the enzyme from carrying electrons to oxygen, thereby **halting cellular respiration** and ATP production. *Mitochondrial DNA synthesis* - While mitochondria are affected, cyanide does not primarily disrupt **DNA synthesis** in these organelles. - Its main target is the process of energy generation, not genetic replication. *ATP production* - Although cyanide poisoning ultimately leads to a **cessation of ATP production**, this is the *consequence* of its action, not the primary mechanism. - The direct mechanism involves inhibiting a key enzyme in the electron transport chain. *Electron transport chain* - Cyanide does indeed inhibit the **electron transport chain**, but this option is too broad. - The most specific mechanism targets a particular complex within the chain, which is **cytochrome oxidase**.
Forensic Medicine
5 questionsHurt is defined under section:
Not seen in fingerprints:
In criminal cases, conduct money is paid by:
Which of the following is NOT a characteristic feature of close-range shotgun wounds?
Which parameter in vitreous humor is most commonly used to estimate the time since death?
NEET-PG 2013 - Forensic Medicine NEET-PG Practice Questions and MCQs
Question 1451: Hurt is defined under section:
- A. 319 IPC (Correct Answer)
- B. 320 IPC
- C. 321 IPC
- D. 323 IPC
Explanation: ***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.
Question 1452: Not seen in fingerprints:
- A. Whorl
- B. Loop
- C. Grid pattern (Correct Answer)
- D. Arch
Explanation: ***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.
Question 1453: In criminal cases, conduct money is paid by:
- A. Court
- B. Judge
- C. No conduct money is given (Correct Answer)
- D. Opposing party
Explanation: ***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.
Question 1454: Which of the following is NOT a characteristic feature of close-range shotgun wounds?
- A. Contact wound with stellate laceration
- B. Beveling of bone at exit wound (Correct Answer)
- C. Abrasion collar around entry wound
- D. Powder tattooing around entry wound
Explanation: ***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
Question 1455: Which parameter in vitreous humor is most commonly used to estimate the time since death?
- A. K+ level (Correct Answer)
- B. Urea level
- C. Na+ level
- D. Glucose level
Explanation: ***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**.
Internal Medicine
1 questionsCafe coronary commonly occurs when a person is:
NEET-PG 2013 - Internal Medicine NEET-PG Practice Questions and MCQs
Question 1451: Cafe coronary commonly occurs when a person is:
- A. Eating meat
- B. Intoxicated (Correct Answer)
- C. Eating fish
- D. Eating fatty food
Explanation: ***Intoxicated*** - **Intoxication**, particularly with alcohol, impairs the **gag reflex** and **swallowing coordination**, increasing the risk of aspiration and airway obstruction [1]. - Reduced awareness and slowed reactions due to intoxication make it difficult for an individual to clear their airway effectively if food becomes lodged, leading to a "cafe coronary" [1]. *Eating meat* - While meat can be a common culprit in cafe coronary incidents due to its **fibrous texture** and potential for large boluses, it's not the primary underlying condition [1], [2]. - The act of eating meat itself does not inherently cause the impaired protective reflexes seen in cafe coronary. *Eating fish* - Fish typically presents a relatively **low risk** for airway obstruction compared to other foods, as it is generally softer and breaks down more easily. - Although bones can be an issue, the specific "cafe coronary" scenario refers to significant airway obstruction by a bolus, not usually associated with typical fish consumption [2]. *Eating fatty food* - Eating fatty foods primarily relates to **digestive issues** or cardiovascular risk, not typically to acute airway obstruction. - Fatty foods do not inherently impair swallowing reflexes or significantly increase the risk of aspiration in the same way intoxication does.
Psychiatry
3 questionsErotomania is seen in:
Mental Health Care Act of India was passed in the year:
Type of schizophrenia with intellectual disability:
NEET-PG 2013 - Psychiatry NEET-PG Practice Questions and MCQs
Question 1451: Erotomania is seen in:
- A. Obsessive compulsive disorder
- B. Delusional disorder (Correct Answer)
- C. Bipolar mania
- D. Mania without psychotic features
Explanation: ***Delusional disorder*** - Erotomania (De Clérambault's syndrome) is **classically a subtype of delusional disorder** known as **erotomanic type** in DSM-5. - Characterized by a **non-bizarre delusion** that another person, usually of higher social status, is in love with the individual. - The delusion persists despite clear evidence to the contrary and is the **primary psychiatric diagnosis** for erotomania. - Patients may engage in behaviors like following, attempting contact, or surveillance of the object of their delusion. *Bipolar mania* - While **psychotic features can occur** in severe manic episodes, they typically involve **grandiose delusions** about one's own abilities, power, wealth, or special identity. - Erotomania is **not a characteristic or common psychotic feature** of bipolar mania. - Manic psychosis more commonly presents with mood-congruent grandiose delusions rather than erotomanic delusions. *Obsessive compulsive disorder* - Characterized by **obsessions** (intrusive, unwanted thoughts) and **compulsions** (repetitive behaviors performed to reduce anxiety). - These thoughts are **ego-dystonic** and recognized as excessive or irrational by the patient. - Erotomania is a **fixed delusional belief** without insight, fundamentally different from OCD phenomenology. *Mania without psychotic features* - By definition involves elevated mood, increased energy, and decreased need for sleep **without delusions or hallucinations**. - Erotomania is a **delusional belief**, indicating presence of psychotic features. - This diagnosis would exclude any presentation with erotomanic delusions.
Question 1452: Mental Health Care Act of India was passed in the year:
- A. 1948
- B. 2007
- C. 1987
- D. 2017 (Correct Answer)
Explanation: ***2017*** - The **Mental Health Care Act of India** was specifically enacted in **2017**, introducing a comprehensive rights-based approach to mental healthcare. - This act replaced the outdated **Mental Health Act 1987** and focuses on protecting the rights of persons with mental illness while ensuring quality care. *1948* - This year marks the **Universal Declaration of Human Rights** globally, but no mental health legislation was enacted in India. - India's mental health framework was still governed by the colonial-era **Indian Lunacy Act of 1912** during this period. *2007* - No significant mental health legislation was passed in India during this year. - The **Mental Health Act 1987** remained in effect, and the new Mental Health Care Act was still a decade away. *1987* - The **Mental Health Act 1987** (without "Care" in the title) was passed in this year, not the Mental Health Care Act. - This act provided the legal framework for mental health services but lacked the comprehensive **rights-based approach** later introduced in 2017.
Question 1453: Type of schizophrenia with intellectual disability:
- A. Catatonic schizophrenia
- B. Pfropf schizophrenia (Correct Answer)
- C. Paranoid schizophrenia
- D. Hebephrenic schizophrenia
Explanation: ***Pfropf schizophrenia*** - **Pfropf schizophrenia** is a historical term specifically used to describe a form of schizophrenia that develops in individuals with **pre-existing intellectual disability** (formerly termed mental retardation). - The term "Pfropf" is derived from German, meaning "grafted" or "engrafted," referring to schizophrenia being "grafted onto" pre-existing intellectual disability. - This term distinguishes it from other types of schizophrenia where intellectual disability is not a primary defining characteristic. - While this classification is largely historical (modern DSM-5 has removed schizophrenia subtypes), it remains relevant for older examination questions. *Catatonic schizophrenia* - Characterized primarily by prominent **psychomotor disturbances**, which can include stupor, catalepsy, waxy flexibility, mutism, and negativism. - While intellectual disability might coexist, it is not a defining feature of the catatonic subtype itself. *Paranoid schizophrenia* - Marked by the prominence of **delusions**, typically persecutory or grandiose, and **auditory hallucinations**. - Intellectual disability is not a core diagnostic criterion or a defining characteristic of this subtype. *Hebephrenic schizophrenia* - Also known as **disorganized schizophrenia**, this type is characterized by marked **disorganization of thought processes**, flat or inappropriate affect, and bizarre behavior. - While it often presents early and can lead to significant functional impairment, intellectual disability is not a defining feature; rather, the primary disturbance is in thought and emotion.