DCOA Mixed Practice Test #448

Question 1

Prophet Muhammad was born in:‌​‍

Accepted Answer

570 CE at Mecca — Muhammad born c. ‌​‍570 CE in Mecca. Migration to Medina (Hijra) 622 CE — Year 1 of Islamic calendar. ‌​‍Died 632 CE.

Answer

610 CE

Answer

632 CE

Answer

622 CE

Question 2

The most widespread type of natural vegetation in India is:‌​‍

Accepted Answer

Tropical Deciduous — Tropical Deciduous Forests (Monsoon Forests) are the most widespread forest type in India, found in areas with 70-200 cm rainfall.‌​‍

Answer

Tropical Evergreen

Answer

Thorn Forest

Answer

Mangrove

Question 3

Capital of Japan:‌​‍

Accepted Answer

Tokyo — Tokyo. Currency = Yen.‌​‍

Answer

Osaka

Answer

Kyoto

Answer

Hiroshima

Question 4

Nematodes are:‌​‍

Accepted Answer

Pseudocoelomate, cylindrical, unsegmented — Ascaris, Wuchereria (filaria). ‌​‍Sexes separate. Pseudocoelom = cavity from blastocoel (not mesoderm-lined).

Answer

Vertebrates

Answer

Coelomate, segmented

Answer

Flatworms

Question 5

Which Indian English writer authored 'Midnight's Children', the Booker Prize winner of 1981?‌​‍

Accepted Answer

Salman Rushdie — Magical realism. ‌​‍Won Booker of Bookers. 'Satanic Verses' (1988) controversial — fatwa by Khomeini.

Answer

Vikram Seth

Answer

Anita Desai

Answer

R.K. Narayan

Question 6

Furosemide is a potent diuretic primarily used in conditions like acute pulmonary edema and severe hypertension. Its mechanism of action involves:

Accepted Answer

A. Inhibiting sodium-potassium-chloride co-transporter in the thick ascending limb of the loop of Henle — Furosemide is a loop diuretic that acts by inhibiting the Na+/K+/2Cl- co-transporter (NKCC2) in the thick ascending limb of the loop of Henle. This action prevents the reabsorption of sodium, potassium, and chloride ions, leading to a significant increase in water and electrolyte excretion. Blocking aldosterone receptors is the mechanism of potassium-sparing diuretics like spironolactone, inhibiting carbonic anhydrase is for acetazolamide, and decreasing sodium reabsorption in the distal convoluted tubule is the primary action of thiazide diuretics.

Answer

B. Blocking aldosterone receptors in the collecting duct

Answer

C. Inhibiting carbonic anhydrase in the proximal tubule

Answer

D. Decreasing sodium reabsorption in the distal convoluted tubule

Question 7

RBCs formed in:‌​‍

Accepted Answer

Bone marrow — Red bone marrow.‌​‍

Answer

Liver

Answer

Spleen

Answer

Heart

Question 8

Adrenaline is called the:‌​‍

Accepted Answer

Fight or flight hormone — Adrenaline (epinephrine) is the 'fight or flight' hormone, released during stress.‌​‍

Answer

Sleep hormone

Answer

Growth hormone

Answer

Love hormone

Question 9

The pH value of pure water at 25 °C is:‌​‍

Accepted Answer

7 — Pure water is neutral (pH = 7); pH <7 acidic, >7 basic.‌​‍

Answer

10

Answer

14

Answer

0

Question 10

Kerala Government Day (Kerala Piravi):‌​‍

Accepted Answer

1 November — Kerala Day — formation.‌​‍

Answer

15 August

Answer

26 January

Answer

1 January

DCOA Mixed Practice Test #448