DCOA Mixed Practice Test #322

Question 1

Unit of resistance:

Accepted Answer

Ohm — Ohm (Ω).

Answer

Volt

Answer

Ampere

Answer

Farad

Question 2

Many drugs exist as enantiomers, and often only one enantiomer is pharmacologically active or has a more favorable therapeutic profile. What is the main reason for this difference in biological activity between enantiomers?

Accepted Answer

B. Differential interaction with chiral biological targets (receptors, enzymes). — Enantiomers, being chiral molecules, can interact differently with chiral biological targets such as receptors, enzymes, and ion channels. This differential interaction at the molecular level leads to variations in their pharmacological activity, potency, metabolism, and sometimes toxicity. While enantiomers have identical physical properties in an achiral environment (like melting points or water solubility), their biological effects diverge due to the chiral environment of the body.

Answer

A. Differences in melting points and boiling points.

Answer

C. Variations in their solubility in water.

Answer

D. Their ability to rotate plane-polarized light in opposite directions.

Question 3

Idukki Dam type:‌​‍

Accepted Answer

Arch dam — Double curvature arch dam. One of highest in Asia.‌​‍

Answer

Gravity dam

Answer

Buttress dam

Answer

Earthen dam

Question 4

The 'Aruvippuram Installation' (Aruvippuram Pratishta) of 1888, which challenged caste hierarchy by consecrating a Shiva idol without Brahmin priests, was led by which social reformer?

Accepted Answer

A. Sree Narayana Guru — Sree Narayana Guru performed the Aruvippuram Installation in 1888, symbolically rejecting caste-based priesthood by installing a Shiva idol without Brahmin intermediaries. Kumaran Asan was a poet and disciple of Narayana Guru but not involved in this act. Mannathu Padmanabhan was associated with the Nair Service Society, and Dr. Palpu was a physician and reformer, neither involved in this specific event.

Answer

B. Kumaran Asan

Answer

C. Mannathu Padmanabhan

Answer

D. Dr. Palpu

Question 5

The 'Kerala Model of Development' is often cited for its unique approach. Which of the following statements most accurately describes its primary distinguishing characteristic?

Accepted Answer

B. Achieving impressive social development indicators like literacy and life expectancy, primarily through extensive public sector provisioning in health and education, even with relatively moderate economic growth. — The Kerala Model is uniquely characterized by its success in achieving high human development indicators, such as literacy, life expectancy, and low infant mortality rates, primarily through significant public investment in social sectors like health and education. This was accomplished despite historically moderate economic growth, distinguishing it from models that prioritize economic growth first. Distractors describe approaches contrary to or not central to the core uniqueness of the Kerala Model.

Answer

A. Attaining high levels of economic growth through rapid industrialization while maintaining strong environmental regulations.

Answer

C. Relying heavily on foreign aid and international grants to fund its social welfare programs and infrastructure development.

Answer

D. Implementing a purely market-driven approach to social welfare, encouraging private investment to meet public needs efficiently.

Question 6

Which kingdom had matriarchy in South India?‌​‍

Accepted Answer

Chera — Kerala (Chera region) historically followed matrilineal (Marumakkathayam) succession.‌​‍

Answer

Pandya

Answer

Chola

Answer

Pallava

Question 7

A teacher has implemented a new peer-tutoring strategy in their class for several weeks and has collected student feedback, observation notes, and performance data. What is the next crucial step in the action research cycle for this teacher?

Accepted Answer

B. Analyze the collected data to understand the impact of the peer-tutoring strategy. — After 'Acting' (implementing the strategy) and 'Observing' (collecting data), the next crucial step in the action research cycle is 'Reflecting.' This involves analyzing the collected data to make sense of the observations and determine the effectiveness of the intervention. Options A and D are premature actions without proper analysis. Option C is dissemination, which comes much later after analysis and reflection.

Answer

A. Immediately abandon the strategy and try a completely different approach.

Answer

C. Publish the preliminary findings in a school newsletter to inform parents.

Answer

D. Expand the peer-tutoring strategy to other subjects or grades without further evaluation.

Question 8

Bakelite, one of the first synthetic plastics, is a:‌​‍

Accepted Answer

Thermosetting plastic — Bakelite (Leo Baekeland, 1907) — phenol-formaldehyde resin, cannot be remelted.‌​‍

Answer

Elastomer

Answer

Natural polymer

Answer

Thermoplastic

Question 9

Who used the adapted motor vehicle dubbed 'Chaitanya Ratham'?‌​‍

Accepted Answer

N.T. Rama Rao — NTR led his political campaign in 'Chaitanya Ratham' bus.‌​‍

Answer

Lalu Prasad Yadav

Answer

L.K. Advani

Answer

M.G. Ramachandran

Question 10

Kerala Mini Kits Agri Scheme:‌​‍

Accepted Answer

All — Comprehensive farmer support.‌​‍

Answer

Tools

Answer

Fertilizer

Answer

Seed distribution

DCOA Mixed Practice Test #322