DCOA Mixed Practice Test #418

Question 1

Cell wall is found in:‌​‍

Accepted Answer

Plant cells only — Plant cells have a rigid cell wall (made of cellulose) outside the cell membrane. ‌​‍Animal cells don't.

Answer

Animal cells only

Answer

Both

Answer

Neither

Question 2

Which AI Action Summit did India participate in?‌​‍

Accepted Answer

Paris Feb 2025 summit — Co-hosted AI Action Summit Paris 2025.‌​‍

Answer

Alone

Answer

Missed

Answer

Hosted

Question 3

Who assassinated Archduke Franz Ferdinand in 1914?‌​‍

Accepted Answer

Gavrilo Princip — Gavrilo Princip, a Serbian Black Hand operative, killed the Austrian heir apparent.‌​‍

Answer

Josip Tito

Answer

Nikola Pasic

Answer

Alexander Karadjordjevic

Question 4

The National Song of India is:‌​‍

Accepted Answer

Vande Mataram — Vande Mataram (from Bankim Chandra's Anandamath) is the National Song. ‌​‍Jana Gana Mana is the National Anthem.

Answer

Jana Gana Mana

Answer

Saare Jahan Se Achcha

Answer

Sare Jahaan Se Achchha

Question 5

Alpha particle is:‌​‍

Accepted Answer

Helium nucleus (2p+2n) — Beta: electron/positron. ‌​‍Gamma: EM photon. Alpha most ionising, least penetrating.

Answer

Electron

Answer

Photon

Answer

Neutron

Question 6

Gulf Cooperation Council members:

Accepted Answer

6 — Saudi, UAE, Qatar, Oman, Kuwait, Bahrain.

Answer

5

Answer

8

Answer

10

Question 7

Lanthanoid contraction is:

Accepted Answer

Gradual decrease in size from La to Lu due to poor shielding of 4f — Consequence: 4d and 5d elements of same group (e.g., Zr and Hf) have nearly identical radii.

Answer

Growth

Answer

Expansion

Answer

No change

Question 8

Kerala cabinet Chief Secretary (top bureaucrat):‌​‍

Accepted Answer

IAS officer — Senior-most IAS officer of state.‌​‍

Answer

Elected

Answer

Political

Answer

Judge

Question 9

Date of Temple Entry Proclamation issued by Sree Chithira Thirunal:

Accepted Answer

November 12, 1936 — The Proclamation was signed on 12 November 1936 (27 Thulam 1112 ME).

Answer

October 12, 1936

Answer

August 12, 1936

Answer

December 12, 1936

Question 10

Which of the following structures is primarily responsible for the exchange of gases between the blood and alveoli in the lungs?

Accepted Answer

C. Alveolar sacs — Alveolar sacs are the primary sites for gas exchange due to their thin walls and extensive capillary network. Bronchi and trachea are conducting airways, while bronchioles lead to alveoli but are not the primary exchange sites.

Answer

A. Bronchi

Answer

B. Bronchioles

Answer

D. Trachea

DCOA Mixed Practice Test #418