Mock Test Set-15

Mock Test Set- 15 

Q1. What is the primary method used to compare suspect dental casts with bitemarks found on a victim?

a) Digital superimposition

b) Metric analysis

c) Impression casting with alginate

d) Scanning electron microscopy

Answer: a) Digital superimposition

Explanation: Digital superimposition allows overlaying the suspect’s dental cast onto the image of the bitemark for precise comparison.

Q2. Which type of distortion is most common in human skin bitemarks?

a) Elastic distortion

b) Compression distortion

c) Stretch distortion

d) Postmortem distortion

Answer: c) Stretch distortion

Explanation: Stretching of the skin during or after the act results in altered bitemark impressions.

Q3. What is the primary function of the enzyme in an ELISA test?

a) Binding the antigen

b) Amplifying the signal

c) Providing fluorescence

d) Producing color change

Answer: d) Producing color change

Explanation: The enzyme reacts with the substrate to produce a detectable color, indicating the presence of the antigen or antibody.

Q4. Which neurotransmitter’s activity is significantly affected by narcotics?

a) Acetylcholine

b) Serotonin

c) Dopamine

d) GABA

Answer: c) Dopamine

Explanation: Narcotics often stimulate the release of dopamine, producing euphoria and addiction.

Q5. Which analytical technique is most suitable for the quantification of morphine in biological samples?

a) Gas Chromatography-Mass Spectrometry (GC-MS)

b) High-Performance Liquid Chromatography (HPLC)

c) Thin-Layer Chromatography (TLC)

d) Fourier-Transform Infrared Spectroscopy (FTIR)

Answer: b) High-Performance Liquid Chromatography (HPLC)

Explanation: HPLC is highly effective for accurate quantification of morphine in complex biological matrices.

Q6. Which test is used to detect cholinesterase inhibition in blood?

a) Tyndall test

b) Ellman’s test

c) Nessler’s test

d) Kastle-Meyer test

Answer: b) Ellman’s test

Explanation: Ellman’s test measures the activity of cholinesterase enzymes in blood samples.

Q7. Which plant-derived poison is an inhibitor of cardiac Na+/K+-ATPase?

a) Ricin

b) Digoxin

c) Curare

d) Coniine

Answer: b) Digoxin

Explanation: Digoxin inhibits Na+/K+-ATPase, affecting cardiac function.

Q8. Which toxic compound is responsible for cyanogenic poisoning from cassava?

a) Hydrocyanic acid

b) Oxalic acid

c) Malic acid

d) Tannic acid

Answer: a) Hydrocyanic acid

Explanation: Cassava contains cyanogenic glycosides, which release hydrocyanic acid when metabolized.

Q9. Which pesticide is associated with delayed polyneuropathy?

a) Malathion

b) DDT

c) Parathion

d) Carbofuran

Answer: c) Parathion

Explanation: Parathion can cause delayed neurotoxic effects, known as organophosphate-induced delayed polyneuropathy (OPIDP).

Q10. Which antidote combination is most effective in treating severe parathion poisoning?

a) Atropine and naloxone

b) Pralidoxime (2-PAM) and atropine

c) Atropine and flumazenil

d) Activated charcoal and naloxone

Answer: b) Pralidoxime (2-PAM) and atropine

Explanation: Atropine blocks muscarinic receptors to counteract acetylcholine's effects, while pralidoxime reactivates acetylcholinesterase by removing the phosphate group attached by paraoxon. This combination is critical for managing organophosphate poisoning, including parathion.

Author:- Srishti Dutta