DCOA Mixed Practice Test #57

Question 1

Connecting link between reptiles and birds:‌​‍

Accepted Answer

Archaeopteryx (fossil, feathers + teeth) — ~150 mya, Jurassic. Had feathers (bird) and teeth + tail (reptile).‌​‍

Answer

Lungfish

Answer

Ichthyostega

Answer

Pterodactyl

Question 2

A traditional herbal preparation for hypertension contains dried roots of *Rauwolfia serpentina*. Which specific alkaloid from this plant is primarily responsible for its antihypertensive and tranquilizing effects by depleting catecholamines and serotonin from nerve endings?

Accepted Answer

C. Reserpine — Reserpine is the main indole alkaloid isolated from *Rauwolfia serpentina* that exhibits significant antihypertensive and tranquilizing properties. It acts by irreversibly blocking the vesicular monoamine transporter (VMAT), leading to depletion of norepinephrine, dopamine, and serotonin. Atropine, Morphine, and Quinine are alkaloids from different plant sources with distinct pharmacological actions.

Answer

A. Atropine

Answer

B. Morphine

Answer

D. Quinine

Question 3

An antacid like magnesium hydroxide neutralises excess stomach acid by:‌​‍

Accepted Answer

Acid-base neutralisation — Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O (neutralising HCl in stomach).‌​‍

Answer

Oxidation

Answer

Reduction

Answer

Combustion

Question 4

In which state does the westernmost point of mainland India lie?‌​‍

Accepted Answer

Gujarat (Guhar Moti) — Guhar Moti in Kutch (Gujarat) is the westernmost point of mainland India.‌​‍

Answer

Rajasthan

Answer

Maharashtra

Answer

Karnataka

Question 5

Kerala Rural Development Programme funds:‌​‍

Accepted Answer

All — Central and state schemes.‌​‍

Answer

Unknown

Answer

MGNREGA + state

Answer

DCP

Question 6

Biotic resources are those derived from:‌​‍

Accepted Answer

The biosphere (living organisms) — Biotic resources (plants, animals, fossil fuels from organic origin) come from the biosphere; abiotic resources are non-living.‌​‍

Answer

Rocks and minerals

Answer

Only water bodies

Answer

The atmosphere

Question 7

Phishing is:‌​‍

Accepted Answer

Fraudulent attempt to steal personal data — Phishing = fraudulent emails/websites impersonating trusted entities to steal passwords, card numbers, etc.‌​‍

Answer

A type of fishing

Answer

A programming language

Answer

A network protocol

Question 8

The term 'magical realism' was coined by art critic:

Accepted Answer

Franz Roh (1925) — German critic Franz Roh introduced the term for post-expressionist art; later adopted for literature.

Answer

Jorge Luis Borges

Answer

Gabriel García Márquez

Answer

Mario Vargas Llosa

Question 9

The ideology of Benito Mussolini in Italy was known as:‌​‍

Accepted Answer

Fascism — Mussolini's 'Fascism' derived from 'fasces' (bundle of rods + axe of Roman emperors).‌​‍

Answer

Nazism

Answer

Bolshevism

Answer

Falangism

Question 10

Boston Tea Party (1773) was:‌​‍

Accepted Answer

American colonists dumped British East India Company tea into Boston Harbor to protest taxes — Sons of Liberty (Samuel Adams) dumped 342 tea chests on 16 December 1773. ‌​‍Protest against Tea Act — 'no taxation without representation.' Escalated to Revolution.

Answer

A celebration

Answer

Japanese tea ceremony

Answer

British holiday

DCOA Mixed Practice Test #57