DCOA Mixed Practice Test #312

Question 1

Acetylcholine is a:

Accepted Answer

Neurotransmitter — Acetylcholine is a major neurotransmitter at neuromuscular junctions and in autonomic nervous system.

Answer

Hormone

Answer

Digestive enzyme

Answer

Antibody

Question 2

Which reformer is associated with the 'Ezhava Memorial' of 1896, a petition demanding reservation in government jobs and educational institutions for the Ezhava community?

Accepted Answer

C. Dr. Palpu — Dr. Palpu, a prominent Ezhava reformer and physician, was the primary leader of the 'Ezhava Memorial' of 1896, which petitioned the Maharaja of Travancore for reservation in government jobs and education. Chattampi Swamikal was a social reformer who advocated against casteism and superstitions but was not directly involved in the memorial. Vaikunda Swamikal, a social reformer from Tamil Nadu, had different ideological influences. Kumaran Asan, a poet-reformer, contributed to social awakening but was not the leader of this specific movement.

Answer

A. Chattampi Swamikal

Answer

B. Vaikunda Swamikal

Answer

D. Kumaran Asan

Question 3

How many rivers in Kerala have main-stream length exceeding 15 km?‌​‍

Accepted Answer

44 — Kerala has 44 rivers (41 west-flowing, 3 east-flowing) over 15 km long.‌​‍

Answer

41

Answer

38

Answer

30

Question 4

Ozone formula:‌​‍

Accepted Answer

O3 — Triatomic oxygen.‌​‍

Answer

H2O

Answer

O2

Answer

O

Question 5

What did the Cabinet Mission Plan of 1946 propose?‌​‍

Accepted Answer

Three-tier federation with grouping of provinces; rejected eventually — Pethick-Lawrence, Cripps, A.V. Alexander. Initially accepted by both Congress and League; broke down over grouping clause. Led to Direct Action Day (16 Aug 1946).

Answer

Immediate partition

Answer

Only provincial autonomy

Answer

Dominion status only

Question 6

Glucose, a simple sugar, has formula:‌​‍

Accepted Answer

C₆H₁₂O₆ — Glucose (monosaccharide): C₆H₁₂O₆. ‌​‍Fructose has same formula but different structure (isomer).

Answer

C₆H₆

Answer

C₂H₅OH

Answer

C₁₂H₂₂O₁₁

Question 7

Liquid non-metal:‌​‍

Accepted Answer

Bromine — Bromine. Only non-metal liquid at room temp.‌​‍

Answer

Mercury

Answer

Iodine

Answer

Phosphorus

Question 8

Time ahead of GMT:

Accepted Answer

5.5 hrs — IST = GMT+5:30.

Answer

4 hrs

Answer

6 hrs

Answer

3 hrs

Question 9

PM2.5 size:‌​‍

Accepted Answer

< 2.5 micrometers — Particulate matter ≤2.5 micrometers.‌​‍

Answer

25 um

Answer

2.5 cm

Answer

2.5 mm

Question 10

Miller-Urey experiment (1953) showed:‌​‍

Accepted Answer

Abiotic synthesis of amino acids from inorganic gases — NH₃, CH₄, H₂, H₂O + spark → amino acids. ‌​‍Supports Oparin-Haldane hypothesis of chemical evolution.

Answer

DNA structure

Answer

Antibiotics

Answer

Cloning

DCOA Mixed Practice Test #312