DCOA Mixed Practice Test #94

Question 1

A regional planner is tasked with identifying areas most susceptible to severe flooding during monsoon seasons in Kerala, while also considering regions prone to significant soil erosion and landslides. Which two physiographic regions would likely be prioritized for flood mitigation and landslide prevention measures, respectively?

Accepted Answer

C. Lowland for flooding, Highland for landslides. — The Lowland region, being flat, low-lying, and crisscrossed by numerous rivers and backwaters, is highly vulnerable to severe flooding, especially during heavy monsoons. In contrast, the Highland region, with its steep slopes, high rainfall, and often fragile geological formations, is most susceptible to significant soil erosion and landslides, necessitating targeted prevention measures. Midland and Coastal Plain have varying degrees of these issues but are not the primary zones for the 'most susceptible' criteria as described.

Answer

A. Midland for flooding, Lowland for landslides.

Answer

B. Highland for flooding, Coastal Plain for landslides.

Answer

D. Coastal Plain for flooding, Midland for landslides.

Question 2

Which vitamin is essential for blood clotting?‌​‍

Accepted Answer

Vitamin K — Vitamin K (Phylloquinone) is essential for blood clotting. ‌​‍Its deficiency leads to delayed clotting and excessive bleeding. Found in green leafy vegetables.

Answer

Vitamin D

Answer

Vitamin C

Answer

Vitamin A

Question 3

The atomic number of sodium is:‌​‍

Accepted Answer

11 — Na = 11 protons, 12 neutrons typically, 11 electrons (2,8,1).‌​‍

Answer

19

Answer

17

Answer

14

Question 4

Operon model was proposed for:‌​‍

Accepted Answer

Prokaryotic gene regulation (lac operon in E. coli) — Jacob and Monod (Nobel 1965). ‌​‍Lactose induces; glucose represses (catabolite repression).

Answer

Virus only

Answer

Eukaryotic genes

Answer

Plant genes

Question 5

How many permanent members does the UN Security Council have?‌​‍

Accepted Answer

5 — The Security Council has 5 permanent members (P5): USA, Russia, China, France, UK. ‌​‍Each has veto power. There are also 10 non-permanent members.

Answer

3

Answer

7

Answer

10

Question 6

The online consultation programme of Kerala Women & Child Department launched in February 2021:‌​‍

Accepted Answer

Bhoomika — 'Bhoomika' offers counselling, legal aid and police assistance online.‌​‍

Answer

Aswasanidhi

Answer

One Stop Centres

Answer

Kathorth

Question 7

Which of the following drugs is classified as a proton pump inhibitor (PPI)?

Accepted Answer

B. Omeprazole — Omeprazole is a proton pump inhibitor used for reducing gastric acid secretion. Ranitidine is an H2 receptor antagonist, while metoclopramide and domperidone are prokinetic agents.

Answer

A. Ranitidine

Answer

C. Metoclopramide

Answer

D. Domperidone

Question 8

Which lens is used in a simple camera?‌​‍

Accepted Answer

Convex (converging) — Camera uses convex lens to form real inverted image on the film/sensor.‌​‍

Answer

Plain glass

Answer

Cylindrical

Answer

Concave

Question 9

The Human Genome Project, completed in 2003, mapped approximately how many genes?‌​‍

Accepted Answer

~20,000-25,000 — The HGP revealed that humans have only ~20,000 protein-coding genes — far fewer than initially expected.‌​‍

Answer

~100,000

Answer

~5,000

Answer

~1 million

Question 10

Hydrogen peroxide has the formula:

Accepted Answer

H₂O₂ — H₂O₂ — used as antiseptic and bleaching agent.

Answer

H₂O

Answer

HO₂

Answer

HO

DCOA Mixed Practice Test #94