DCOA Mixed Practice Test #591

Question 1

Many antibiotics target bacterial ribosomes to inhibit protein synthesis, thereby killing the bacteria. This mechanism exploits the structural differences between bacterial and human ribosomes. Which of the following organelles in human cells is primarily responsible for protein synthesis?

Accepted Answer

D. Ribosomes — Ribosomes are the cellular organelles responsible for protein synthesis (translation) in both prokaryotic (bacteria) and eukaryotic (human) cells. While the endoplasmic reticulum is involved in processing and transporting proteins, the actual synthesis occurs on ribosomes, either free in the cytoplasm or attached to the ER. Mitochondria are for energy production, and the nucleus houses genetic material.

Answer

A. Mitochondria

Answer

B. Nucleus

Answer

C. Endoplasmic Reticulum

Question 2

India's Atomic Energy chair:‌​‍

Accepted Answer

Ajit Kumar Mohanty — Ajit Kumar Mohanty.‌​‍

Answer

Rakesh Mohan

Answer

Kamlesh Vyas

Answer

KN Vyas

Question 3

Pellagra (3 Ds: dermatitis, diarrhoea, dementia) is caused by deficiency of:‌​‍

Accepted Answer

Vitamin B₃ (niacin) — Niacin deficiency leads to pellagra.‌​‍

Answer

Vitamin C

Answer

Vitamin B₆

Answer

Vitamin B₁

Question 4

Kerala Assembly 2021 — historic:‌​‍

Accepted Answer

First time LDF retained power consecutively — Ended alternating trend.‌​‍

Answer

UDF always wins

Answer

All

Answer

Alternating ended

Question 5

Which of the following is a good electrical conductor?

Accepted Answer

Copper — Copper is widely used for wiring due to low resistance and ductility.

Answer

Glass

Answer

Rubber

Answer

Wood

Question 6

Arctic circle countries:

Accepted Answer

8 (Russia, Canada, USA, Norway, Sweden, Finland, Denmark(Greenland), Iceland) — Eight nations.

Answer

Only Russia

Answer

5

Answer

3

Question 7

The primary purpose of a classroom teacher engaging in action research is to:

Accepted Answer

C. Systematically investigate and improve their own teaching practices and student learning within their specific classroom context. — Action research is practitioner-led and aims for immediate, context-specific improvement in teaching and learning. Its focus is on the teacher's own practice and students, rather than generating universal theories or publishing for a wider academic audience. Comparing performance is an evaluation activity, not the core purpose of improving practice itself through research.

Answer

A. Publish findings in high-impact educational journals.

Answer

B. Develop universal educational theories applicable across diverse settings.

Answer

D. Compare their students' academic performance against district-wide benchmarks.

Question 8

India's ranking in Ease of Doing Business jumped from 142 (2014) to — in 2020:‌​‍

Accepted Answer

63 — India climbed to 63rd in 2020 EoDB rankings (World Bank). ‌​‍Report discontinued in 2021 after methodology concerns.

Answer

55

Answer

72

Answer

42

Question 9

Study of inscriptions:‌​‍

Accepted Answer

Epigraphy — Epigraphy.‌​‍

Answer

Numismatics

Answer

Philately

Answer

Calligraphy

Question 10

V.T. Bhattathirippad wrote:‌​‍

Accepted Answer

Adukkalayil Ninnu Arangathekku — 'Adukkalayil Ninnu Arangathekku' (From Kitchen to Stage) was V.T. ‌​‍Bhattathirippad's autobiography about women's emancipation in Namboothiri community.

Answer

Veena Poovu

Answer

Marthanda Varma

Answer

Chemmeen

DCOA Mixed Practice Test #591