DCOA Mixed Practice Test #84

Question 1

The SI unit of electric current is:‌​‍

Accepted Answer

Ampere — Ampere (A) is the SI unit of electric current, named after French physicist André-Marie Ampère. ‌​‍Volt = potential difference, Watt = power, Ohm = resistance.

Answer

Watt

Answer

Volt

Answer

Ohm

Question 2

The first telegraph line in India was between:‌​‍

Accepted Answer

Calcutta-Diamond Harbour — First telegraph line: Calcutta to Diamond Harbour (1851) under Lord Dalhousie.‌​‍

Answer

Delhi-Agra

Answer

Bombay-Thane

Answer

Madras-Bangalore

Question 3

Principle of Mathematical Induction proves:‌​‍

Accepted Answer

Statements P(n) for all natural n, by base and inductive step — Prove P(1) and P(k) → P(k+1). Used in divisibility, summation formulas.‌​‍

Answer

Identity

Answer

Only limits

Answer

Integration

Question 4

During a microteaching session, a trainee teacher is observed to be overly focused on delivering the content and neglects to check for student understanding. Which microteaching skill is most lacking in this scenario?

Accepted Answer

D. Concept Checking — The correct answer is D. Concept Checking. While the trainee teacher may be proficient in presenting the content (C), the lack of checking for student understanding indicates a deficiency in concept checking. Questioning (A) and reinforcement (B) are important but secondary to ensuring that students grasp the material, which is the primary goal of concept checking.

Answer

A. Questioning

Answer

B. Reinforcement

Answer

C. Presentation

Question 5

Kerala Pilgrims at Sabarimala:

Accepted Answer

Millions annually — Millions during Mandalam-Makaravilakku season.

Answer

Hundreds

Answer

Thousands only

Answer

Unknown

Question 6

A patient suffers a stroke and subsequently experiences difficulty with balance, coordination, and fine motor skills. Which part of the brain was most likely affected?

Accepted Answer

C. Cerebellum — The cerebellum is primarily responsible for coordinating voluntary movements, maintaining balance, posture, and muscle tone. Damage to the cerebellum, often due to a stroke, typically results in symptoms such as ataxia (lack of coordination), gait disturbances, and impaired fine motor control. The cerebrum is involved in higher cognitive functions, the brainstem controls vital involuntary functions, and the thalamus acts as a relay station for sensory information.

Answer

A. Cerebrum

Answer

B. Brainstem

Answer

D. Thalamus

Question 7

In the same reaction (Zn + CuSO₄), copper ion is:‌​‍

Accepted Answer

Reduced — Cu²⁺ + 2e⁻ → Cu; Cu²⁺ gains electrons → reduction.‌​‍

Answer

Oxidised

Answer

A catalyst

Answer

Unchanged

Question 8

The first human on the Moon was:‌​‍

Accepted Answer

Neil Armstrong (20 July 1969) — Apollo 11 mission: Neil Armstrong stepped on Moon 20 July 1969, 'one small step for [a] man, one giant leap for mankind.' Aldrin 2nd, Collins orbited.‌​‍

Answer

Buzz Aldrin

Answer

John Glenn

Answer

Yuri Gagarin

Question 9

Human heart is:‌​‍

Accepted Answer

Four-chambered — 2 atria, 2 ventricles — Complete double circulation. ‌​‍Fish: 2-chambered. Amphibians/most reptiles: 3. ‌​‍Birds, mammals: 4.

Answer

Three-chambered

Answer

Two-chambered

Answer

No chambers

Question 10

Which of the following bacterial structures is primarily responsible for adherence to host cells and surfaces, playing a crucial role in initiating infection?

Accepted Answer

C. Pili (Fimbriae). — Pili, also known as fimbriae, are short, hair-like appendages on the surface of many bacteria that enable them to adhere to host cells and surfaces, which is a critical first step in establishing an infection. The cell wall (A) provides structural integrity, flagella (B) are primarily involved in motility, and the capsule (D) helps resist phagocytosis but is less directly involved in initial adherence compared to pili.

Answer

A. Cell wall.

Answer

B. Flagella.

Answer

D. Capsule.

DCOA Mixed Practice Test #84