DCOA Mixed Practice Test #431

Question 1

If salary increased from 20,000 to 25,000, % increase:

Accepted Answer

25% — Increase 5000. 5000/20000×100 = 25%.

Answer

20%

Answer

30%

Answer

15%

Question 2

What is the size of PM2.5 particulate matter?‌​‍

Accepted Answer

< 2.5 micrometers — Particulate matter ≤2.5 micrometers.‌​‍

Answer

25 um

Answer

2.5 cm

Answer

2.5 mm

Question 3

The Paris Agreement on climate change was signed in:‌​‍

Accepted Answer

2015 — The Paris Agreement was adopted in December 2015, committing nations to limit global warming to 1.5-2°C above pre-industrial levels.‌​‍

Answer

2010

Answer

2012

Answer

2017

Question 4

The Ezhava Memorial (1896), submitted to the Travancore Maharaja, was led by:

Accepted Answer

Dr. Palpu — Dr. Padmanabhan Palpu led the Ezhava Memorial demanding equal rights for Ezhavas in government jobs.

Answer

Sree Narayana Guru

Answer

Sahodaran Ayyappan

Answer

T. K. Madhavan

Question 5

Impulse equals change in:‌​‍

Accepted Answer

Momentum — Impulse = F × Δt = Δp (change in momentum).‌​‍

Answer

Mass

Answer

Acceleration

Answer

Velocity

Question 6

Which class of diuretics primarily acts on the ascending limb of the loop of Henle to inhibit sodium and chloride reabsorption, leading to potent diuresis?

Accepted Answer

C. Loop diuretics — Loop diuretics (e.g., furosemide) are highly effective because they block the Na+/K+/2Cl- cotransporter in the thick ascending limb of the loop of Henle, where a significant portion of sodium reabsorption occurs. Thiazide diuretics act on the distal convoluted tubule, potassium-sparing diuretics act on the collecting duct, and osmotic diuretics act throughout the nephron.

Answer

A. Thiazide diuretics

Answer

B. Potassium-sparing diuretics

Answer

D. Osmotic diuretics

Question 7

BT cotton has gene from:

Accepted Answer

Bacillus thuringiensis — cry gene — Cry1Ab, Cry1Ac for bollworms. Approved in India 2002. Controversy over economic and environmental effects.

Answer

Virus

Answer

Fungus

Answer

Another plant

Question 8

The functional group of an alcohol is:

Accepted Answer

−OH — −OH (hydroxyl) is the functional group of alcohols (e.g., methanol CH₃OH).

Answer

−COOH

Answer

−CHO

Answer

−NH₂

Question 9

Who wrote Mathilukal?‌​‍

Accepted Answer

Basheer — Basheer — novella about prison love story.‌​‍

Answer

Thakazhi

Answer

M.T.

Answer

Pottekkatt

Question 10

The main site of digestion and absorption of nutrients is the:‌​‍

Accepted Answer

Small intestine — The small intestine (duodenum, jejunum, ileum) absorbs most nutrients through villi.‌​‍

Answer

Large intestine

Answer

Stomach

Answer

Liver

DCOA Mixed Practice Test #431