DCOA Mixed Practice Test #146

Question 1

Leaders inspired by Sree Narayana Guru: (i) Dr. ‌​‍Palpu (ii) Kumaran Asan (iii) Nataraja Guru (iv) Nitya Chaitanya Yati

Accepted Answer

All four — All four drew inspiration from Sree Narayana Guru.‌​‍

Answer

Only (ii & iii)

Answer

Only (i, ii & iii)

Answer

Only (i & ii)

Question 2

Which layer of the skin acts as the primary barrier to the absorption of many topically applied medications, due to its tightly packed, keratinized cells?

Accepted Answer

C. Stratum corneum — The stratum corneum is the outermost layer of the epidermis, consisting of multiple layers of dead, flattened, keratinized cells. This tightly packed, lipid-rich structure forms a formidable barrier, significantly limiting the penetration of most substances, including topically applied medications. The dermis and hypodermis are deeper layers, and while the entire epidermis contributes, the stratum corneum is the most critical barrier component.

Answer

A. Dermis

Answer

B. Hypodermis

Answer

D. Epidermis (excluding stratum corneum)

Question 3

BT cotton has gene from:‌​‍

Accepted Answer

Bacillus thuringiensis — cry gene — Cry1Ab, Cry1Ac for bollworms. ‌​‍Approved in India 2002. Controversy over economic and environmental effects.

Answer

Virus

Answer

Another plant

Answer

Fungus

Question 4

The amount of sun's energy reaching Earth's surface is called:

Accepted Answer

Insolation — Insolation = Incoming Solar Radiation striking Earth's surface.

Answer

Radiation

Answer

Convection

Answer

Advection

Question 5

Laterite soils are extensively found in the midland regions of Kerala. Considering their formation process and typical properties, which of the following statements accurately describes a key characteristic and its implication for agriculture in the state?

Accepted Answer

C. They are characterized by a high content of iron and aluminum oxides, are generally acidic, and have low fertility due to intense leaching of basic nutrients, requiring liming and fertilization for good yields. — Laterite soils form under hot, humid tropical conditions through intense leaching, which removes silica and most basic cations, leaving behind iron and aluminum oxides. This process makes them acidic and poor in essential plant nutrients and organic matter. Consequently, farmers in Kerala often need to apply lime to neutralize acidity and add fertilizers to improve soil fertility for successful cultivation.

Answer

A. They are highly fertile due to rich organic matter content and excellent water retention, supporting intensive farming without significant amendments.

Answer

B. They are formed through the deposition of river sediments, making them deep, well-aerated, and naturally rich in all macro-nutrients.

Answer

D. They possess a high cation exchange capacity and neutral pH, which allows for a wide variety of crops to thrive naturally even in dry conditions.

Question 6

With reference to Educational Degree, what does Ph.D. stand for?‌​‍

Accepted Answer

Doctor of Philosophy — Doctor of Philosophy.‌​‍

Answer

Diploma of Philosophy

Answer

Diploma in Psychology

Answer

Drama in Philosophy

Question 7

Which of the following cellular compartments is the primary site for the metabolic pathway of glycolysis?

Accepted Answer

B. Cytosol — Glycolysis is the metabolic pathway that converts glucose into pyruvate, generating ATP and NADH. This crucial process occurs exclusively in the cytosol of the cell, independent of oxygen. The mitochondrial matrix is where the Krebs cycle and oxidative phosphorylation take place, while the endoplasmic reticulum is involved in protein and lipid synthesis.

Answer

A. Mitochondrial matrix

Answer

C. Endoplasmic reticulum

Answer

D. Lysosomes

Question 8

First RRTS (Namo Bharat) section:‌​‍

Accepted Answer

Delhi-Meerut — Delhi-Ghaziabad-Meerut RRTS — first section opened Oct 2023.‌​‍

Answer

Delhi-Gurgaon

Answer

Delhi-Jaipur

Answer

Mumbai-Pune

Question 9

Vitamin D deficiency causes:

Accepted Answer

Rickets — Rickets (in children) — bone deformity. Sunlight helps synthesize Vitamin D.

Answer

Scurvy

Answer

Beriberi

Answer

Pellagra

Question 10

India's rescue operation to bring back Indian nationals during the Hamas–Israel conflict:‌​‍

Accepted Answer

Operation Ajay — Operation Ajay was launched in October 2023.‌​‍

Answer

Operation Vijay

Answer

Operation Hamas

Answer

Operation Bluestar

DCOA Mixed Practice Test #146