DCOA Mixed Practice Test #550

Question 1

Rust is:‌​‍

Accepted Answer

Iron oxide — Fe₂O₃·xH₂O — hydrated iron(III) oxide.‌​‍

Answer

Iron carbonate

Answer

Iron sulphide

Answer

Iron chloride

Question 2

1 byte equals:‌​‍

Accepted Answer

8 bits — 1 byte = 8 bits. 1 bit = 0 or 1.‌​‍

Answer

4 bits

Answer

16 bits

Answer

32 bits

Question 3

The Wagon Tragedy happened during:‌​‍

Accepted Answer

Malabar Rebellion — During Malabar Rebellion (1921), prisoners suffocated in a closed goods wagon (Black Hole of Podannur).‌​‍

Answer

Vaikom Satyagraha

Answer

Punnapra-Vayalar

Answer

Quit India

Question 4

A common symptom of iron deficiency anemia related to oxygen transport is:

Accepted Answer

C. Fatigue and weakness — Iron is a crucial component of hemoglobin, which carries oxygen in red blood cells. A deficiency in iron leads to reduced oxygen-carrying capacity, resulting in symptoms like fatigue, weakness, and shortness of breath. Hypertension is high blood pressure, jaundice is yellowing of the skin (often liver-related), and hyperglycemia is high blood sugar.

Answer

A. Hypertension

Answer

B. Jaundice

Answer

D. Hyperglycemia

Question 5

Lipase digests:‌​‍

Accepted Answer

Fats — Fat digestion.‌​‍

Answer

Carbohydrates

Answer

Nucleic acids

Answer

Proteins

Question 6

World's 2nd largest rice producer:

Accepted Answer

India — India (after China).

Answer

China

Answer

Bangladesh

Answer

Indonesia

Question 7

Strait of Hormuz between:‌​‍

Accepted Answer

Both A and C — Both descriptions apply.‌​‍

Answer

UAE and Iran

Answer

Persian Gulf and Arabian Sea

Answer

Iran and Oman

Question 8

The Nobel Prize in Physiology or Medicine is awarded annually for outstanding discoveries in the field of life sciences and medicine. According to Alfred Nobel's will, what is the primary criterion for selecting laureates in this category?

Accepted Answer

C. The discovery must have conferred the greatest benefit on humankind. — Alfred Nobel's will explicitly states that the Nobel Prize in Physiology or Medicine should be awarded for discoveries that have 'conferred the greatest benefit on humankind.' Other criteria like geographical origin, specific medical subfields, or the laureate's active clinical practice are not primary considerations for the selection process.

Answer

A. The discovery must have originated from a specific research institution or country.

Answer

B. The award is given only for advancements in surgical techniques or drug development.

Answer

D. Laureates must be actively practicing clinicians at the time of the award.

Question 9

The total number of bones in an adult human body is:‌​‍

Accepted Answer

206 — Adults have 206 bones. Newborns have ~270 (many fuse during growth).‌​‍

Answer

208

Answer

212

Answer

300

Question 10

Tiger:‌​‍

Accepted Answer

All — National animal since 1973.‌​‍

Answer

Sacred

Answer

National Animal

Answer

State

DCOA Mixed Practice Test #550