DCOA Mixed Practice Test #444

Question 1

mRNA codon — start codon:‌​‍

Accepted Answer

AUG (Methionine) — Stop codons: UAA, UAG, UGA (amber, ochre, opal). ‌​‍Genetic code is degenerate, non-overlapping, nearly universal.

Answer

UGA

Answer

UAG

Answer

UAA

Question 2

Neurotransmitter at neuromuscular junction (vertebrates):

Accepted Answer

Acetylcholine — Broken down by acetylcholinesterase. Myasthenia gravis: autoimmune disease affecting ACh receptors.

Answer

Dopamine

Answer

GABA

Answer

Serotonin

Question 3

Travancore Royal Family:‌​‍

Accepted Answer

Venad — Venad lineage.‌​‍

Answer

Perumpadappu

Answer

Kolathiri

Answer

Nair

Question 4

G. S. Ghurye is known as:‌​‍

Accepted Answer

Father of Indian Sociology — Govind Sadashiv Ghurye (1893-1983) — pioneer of Indian sociology. ‌​‍His 'Caste and Race in India' (1932) is foundational.

Answer

Father of Economics

Answer

Father of Linguistics

Answer

Father of Psychology

Question 5

Which of the following is the PRIMARY mode of transmission of Mycobacterium tuberculosis?

Accepted Answer

B. Inhalation of aerosolized droplets — Mycobacterium tuberculosis is primarily spread through inhalation of aerosolized droplets expelled by an infected person during coughing or sneezing. It is not transmitted through direct contact with blood, ingestion of food, or vector-borne routes.

Answer

A. Direct contact with infected blood

Answer

C. Ingestion of contaminated food

Answer

D. Vector-borne transmission via mosquitoes

Question 6

NEP 2020 emphasizes Continuous Professional Development (CPD) for teachers, mandating a minimum of 50 hours per year. What is the primary objective of this emphasis on regular CPD for teachers within the framework of NEP and SCERT's initiatives?

Accepted Answer

B. To ensure teachers are updated with the latest pedagogical approaches, subject content, and technology for improved student outcomes. — The primary objective of mandatory Continuous Professional Development (CPD) under NEP 2020 is to empower teachers with updated knowledge, innovative pedagogical skills, and effective use of technology. This ensures they can adapt to evolving educational needs, enhance teaching-learning processes, and ultimately improve student learning outcomes and holistic development.

Answer

A. To increase the administrative workload of teachers by introducing new reporting requirements.

Answer

C. To facilitate a hierarchical promotion system based solely on the number of training hours completed.

Answer

D. To replace traditional classroom teaching with online learning modules for teachers.

Question 7

Morning/Evening Star:‌​‍

Accepted Answer

Venus — Venus — brightest planet, visible as morning/evening star.‌​‍

Answer

Jupiter

Answer

Mars

Answer

Mercury

Question 8

The general formula of alkynes is:

Accepted Answer

CₙH₂ₙ₋₂ — Alkynes have one C≡C triple bond; formula CₙH₂ₙ₋₂.

Answer

CₙH₂ₙ₊₂

Answer

CₙH₂ₙ

Answer

CₙH₂ₙ₊₁

Question 9

Earth's rotation on its axis takes approximately:‌​‍

Accepted Answer

23 hours 56 minutes — A sidereal day (Earth's rotation relative to stars) is ~23 hours 56 minutes.‌​‍

Answer

23 hours 30 minutes

Answer

24 hours

Answer

25 hours

Question 10

Deepest lake:‌​‍

Accepted Answer

Baikal — Lake Baikal (1,642 m) — Russia.‌​‍

Answer

Tanganyika

Answer

Victoria

Answer

Caspian

DCOA Mixed Practice Test #444