DCOA Mixed Practice Test #723

Question 1

'Reaching families through women and reaching communities through families' is the slogan of:

Accepted Answer

Kudumbashree — Kudumbashree's well-known guiding philosophy.

Answer

Bharat Nirman

Answer

Mahila Samriddhi Yojana

Answer

Indira Awaas Yojana

Question 2

Photoperiodism:‌​‍

Accepted Answer

Response to day/night length — Flowering response to light duration.‌​‍

Answer

Gravity

Answer

Water response

Answer

Temperature

Question 3

Kerala's diverse topography and climate contribute to various soil types, with laterite soils being prominent in many regions. From an agricultural perspective, which of the following accurately describes a characteristic challenge associated with laterite soils in Kerala and its underlying cause?

Accepted Answer

C. Poor nutrient retention and acidity, primarily due to intense leaching of soluble minerals under heavy rainfall and high temperatures. — Laterite soils in Kerala are formed under conditions of high temperature and heavy rainfall, which lead to intense leaching of soluble minerals and silica, leaving behind iron and aluminum oxides. This process results in soils that are generally acidic and poor in essential plant nutrients, posing a significant challenge for agriculture without proper management. Options A and B describe characteristics opposite to laterite soils, while D refers to a problem primarily affecting coastal alluvial soils.

Answer

A. High fertility due to rich organic matter content, resulting from dense forest cover.

Answer

B. Excellent water retention capacity, making them ideal for paddy cultivation without extensive irrigation.

Answer

D. Susceptibility to severe salinity, caused by tidal incursions in coastal areas.

Question 4

Sodium (Na+) is a crucial electrolyte in the human body. What is its primary role in maintaining cellular function and fluid balance?

Accepted Answer

C. Maintaining osmotic pressure and nerve impulse transmission. — Sodium is the primary extracellular cation and plays a critical role in maintaining osmotic pressure and fluid balance between cells and their surroundings. It is also essential for the generation and transmission of nerve impulses and muscle contraction. Oxygen transport is primarily by hemoglobin, blood clotting by platelets and coagulation factors, and genetic information storage by nucleic acids.

Answer

A. Facilitating oxygen transport.

Answer

B. Regulating blood clotting.

Answer

D. Storing genetic information.

Question 5

Which of the following statements about chiral drugs is FALSE?

Accepted Answer

B. Enantiomers of a chiral drug always have identical pharmacological activity. — Enantiomers of a chiral drug typically have different pharmacological activities, potencies, and pharmacokinetic profiles because biological systems (receptors, enzymes) are chiral and can selectively interact with one enantiomer over the other. The other statements correctly describe aspects of chirality in drugs.

Answer

A. Chiral drugs contain at least one asymmetric carbon atom.

Answer

C. Stereoisomers have the same molecular formula but different spatial arrangements.

Answer

D. The body can often distinguish between enantiomers, leading to different pharmacokinetic profiles.

Question 6

Transformer's input power (ideal) equals its:

Accepted Answer

Output power — Ideal transformer: Pₚ = Pₛ (no losses); V_p·I_p = V_s·I_s.

Answer

Half of output

Answer

Double the output

Answer

Zero

Question 7

India approved a Special Economic Zone for its first:‌​‍

Accepted Answer

Semiconductor fabrication plant — The SEZ for India's first semiconductor fab marks a major step toward domestic chip manufacturing under the India Semiconductor Mission.‌​‍

Answer

Electric vehicle plant

Answer

Solar panel factory

Answer

AI research centre

Question 8

Niacin (Vitamin B3) plays a vital role in cellular metabolism. Its biologically active forms, NAD+ and NADP+, function primarily as:

Accepted Answer

C. Coenzymes in redox reactions — Niacin, or Vitamin B3, is a precursor to the coenzymes Nicotinamide Adenine Dinucleotide (NAD+) and Nicotinamide Adenine Dinucleide Phosphate (NADP+). These coenzymes are crucial electron carriers in numerous cellular redox reactions, playing central roles in energy metabolism (e.g., glycolysis, oxidative phosphorylation) and biosynthetic pathways.

Answer

A. Structural components of cell membranes

Answer

B. Precursors for neurotransmitters

Answer

D. Regulators of gene expression

Question 9

Social work profession in India — pioneer institute:‌​‍

Accepted Answer

Tata Institute of Social Sciences (TISS, 1936 — Mumbai) — Founded by Clifford Manshardt + Dorabji Tata Trust. ‌​‍Earlier Sir Dorabji Tata Graduate School of Social Work. Leading SW institute.

Answer

JNU

Answer

Kerala University

Answer

DU

Question 10

Alexander the Great was a student of:

Accepted Answer

Aristotle — Aristotle tutored young Alexander (343-340 BCE) at Mieza. Alexander later conquered Persian Empire, reached Punjab (Battle of Hydaspes 326 BCE).

Answer

Socrates

Answer

Plato

Answer

Pythagoras

DCOA Mixed Practice Test #723