DCOA Mixed Practice Test #478

Question 1

Cellulose is polymer of:‌​‍

Accepted Answer

β-glucose (β-1,4 linkages) — Straight chains, hydrogen bonded. ‌​‍Humans lack cellulase — can't digest. Ruminants and termites have symbiotic microbes.

Answer

α-glucose

Answer

Mannose

Answer

Fructose

Question 2

Ayyankali founded:

Accepted Answer

Sadhujana Paripalana Sangham — Ayyankali — social reformer, founded Sadhujana Paripalana Sangham (1907).

Answer

SNDP

Answer

Yogakshema Sabha

Answer

Nair Service Society

Question 3

Thermal power plants use which fuel to produce electricity?‌​‍

Accepted Answer

Coal (or natural gas, oil) — Thermal plants burn fossil fuels to heat water → steam → turbine → generator.‌​‍

Answer

Uranium only

Answer

Water only

Answer

Sunlight

Question 4

Dry ice is the solid form of:‌​‍

Accepted Answer

Carbon Dioxide — Dry ice is solid Carbon Dioxide (CO₂). ‌​‍It sublimes directly from solid to gas at -78.5°C, without passing through a liquid phase.

Answer

Oxygen

Answer

Nitrogen

Answer

Water

Question 5

Kerala Rajya Sabha seats:‌​‍

Accepted Answer

9 — 9 Rajya Sabha members.‌​‍

Answer

13

Answer

11

Answer

7

Question 6

Idukki Dam is built on the river:‌​‍

Accepted Answer

Periyar — Idukki arch dam is on the Periyar River.‌​‍

Answer

Bharathapuzha

Answer

Chaliyar

Answer

Kabini

Question 7

Red Cross founder:‌​‍

Accepted Answer

Henry Dunant — Henry Dunant (1863). HQ: Geneva.‌​‍

Answer

Florence Nightingale

Answer

Albert Schweitzer

Answer

Marie Curie

Question 8

Which part of the nephron is primarily responsible for the reabsorption of glucose in the kidney?

Accepted Answer

A. Proximal convoluted tubule — The proximal convoluted tubule (PCT) is the site where nearly all glucose is reabsorbed via sodium-glucose transport proteins (SGLT). The loop of Henle primarily handles water and electrolyte balance, while the distal tubule and collecting duct focus on fine-tuning reabsorption and secretion. Distractors like the loop of Henle or distal tubule may distract due to their roles in fluid balance.

Answer

B. Loop of Henle

Answer

C. Distal convoluted tubule

Answer

D. Collecting duct

Question 9

A person who studies stars and planets is called:‌​‍

Accepted Answer

Astronomer — Astronomer studies celestial objects scientifically; astrologer predicts fate from stars.‌​‍

Answer

Geologist

Answer

Astrologer

Answer

Biologist

Question 10

Kerala floods year:

Accepted Answer

2018 — Kerala floods August 2018 — worst in 100 years.

Answer

2016

Answer

2017

Answer

2019

DCOA Mixed Practice Test #478