DCOA Mixed Practice Test #368

Question 1

The Travancore-Cochin state, merging the two princely states, came into being on:‌​‍

Accepted Answer

1 July 1949 — Travancore and Cochin merged to form Travancore-Cochin on 1 July 1949; it became Kerala in 1956.‌​‍

Answer

15 August 1947

Answer

26 January 1950

Answer

1 November 1956

Question 2

What does a wide base in a population pyramid imply?‌​‍

Accepted Answer

High birth rate (developing countries) — India: youthful pyramid but narrowing. ‌​‍Japan: inverted (ageing). USA: rectangular (stable).

Answer

Stable

Answer

Declining

Answer

Ageing

Question 3

The Gutenberg printing press was invented around:‌​‍

Accepted Answer

1450 — Johannes Gutenberg's movable-type printing press (c. ‌​‍1450) in Germany. Revolutionised book production, spread of Reformation, literacy.

Answer

1500

Answer

1600

Answer

1300

Question 4

Blood volume in adult:‌​‍

Accepted Answer

4-5L — About 5 litres.‌​‍

Answer

2L

Answer

6-7L

Answer

10L

Question 5

Iron is an essential trace element. Its deficiency can lead to anemia. What is the primary biochemical role of iron in the human body that, when impaired, causes the characteristic symptoms of anemia?

Accepted Answer

A. Oxygen transport via hemoglobin — Iron is a critical component of the heme group in hemoglobin, the protein responsible for oxygen transport in red blood cells. In this capacity, iron reversibly binds to oxygen in the lungs and releases it in tissues. A deficiency in iron directly impairs hemoglobin synthesis, leading to reduced oxygen-carrying capacity of the blood, which is the hallmark of anemia.

Answer

B. Regulation of blood pressure

Answer

C. Formation of bone matrix

Answer

D. Synthesis of steroid hormones

Question 6

Kerala's UNESCO sites:

Accepted Answer

Western Ghats — Part of Western Ghats inscribed 2012.

Answer

Nilambur teak

Answer

None individually from Kerala

Answer

Both

Question 7

Which supplement is now a new treatment for diarrhoea given along with ORS?‌​‍

Accepted Answer

Zinc — WHO/UNICEF recommend zinc supplementation with ORS to reduce diarrhoea duration and severity.‌​‍

Answer

Phosphorus

Answer

Lithium

Answer

Calcium

Question 8

Months with 31 days:‌​‍

Accepted Answer

7 — 7 months: Jan, Mar, May, Jul, Aug, Oct, Dec.‌​‍

Answer

5

Answer

6

Answer

8

Question 9

Blood typing for transfusion was first established after:‌​‍

Accepted Answer

Discovery of ABO blood groups (Landsteiner, 1901) — Before Landsteiner, transfusions often fatal due to ABO incompatibility.‌​‍

Answer

Invention of syringes

Answer

Discovery of DNA

Answer

Antibiotics

Question 10

The Sangam Age (Tamil literature) belongs to:‌​‍

Accepted Answer

c. 300 BCE - 300 CE — Sangam literature — Three Sangams at Madurai according to tradition. ‌​‍Earliest Tamil classical literature. Key texts: Tolkappiyam, Tirukkural, Silappadikaram, Manimekalai, Ettuthokai.

Answer

Modern

Answer

Medieval

Answer

5000 BCE

DCOA Mixed Practice Test #368