DCOA Mixed Practice Test #445

Question 1

Allegory:‌​‍

Accepted Answer

Story with deeper symbolic/moral meaning — E.g., Pilgrim's Progress, Animal Farm. ‌​‍Extended metaphor as narrative. Fables teach lesson.

Answer

Literal

Answer

Only dialogue

Answer

Description

Question 2

Budding is asexual reproduction seen in:

Accepted Answer

Hydra, yeast — New individual develops from outgrowth. Hydra: daughter separates or remains. Yeast: common budding reproduction.

Answer

Humans

Answer

Birds

Answer

Ferns

Question 3

A patient experiences difficulty with balance, coordination, and fine motor skills after a traumatic head injury. Which part of the brain is most likely affected?

Accepted Answer

C. Cerebellum — The cerebellum is primarily responsible for coordinating voluntary movements, maintaining posture, balance, and equilibrium. Damage to the cerebellum often results in ataxia (lack of coordination), tremors, and difficulties with fine motor control, matching the patient's symptoms. The cerebrum handles higher cognitive functions, the brainstem vital functions, and the thalamus sensory relay.

Answer

A. Cerebrum

Answer

B. Brainstem

Answer

D. Thalamus

Question 4

Snell's law:‌​‍

Accepted Answer

n₁ sin θ₁ = n₂ sin θ₂ — Refraction at boundary. ‌​‍Also n = c/v (refractive index). Critical angle: sin θc = n₂/n₁ (for n₁>n₂).

Answer

n₁/n₂ = θ₁/θ₂

Answer

n = c/v only

Answer

sin θ = n

Question 5

A teacher observes that one student, Amal, spends extra hours in the library researching topics beyond the syllabus purely out of curiosity and enjoyment. Another student, Bina, studies diligently only when there's an upcoming exam or a promise of a reward from parents. Which of the following best describes the primary motivational types displayed by Amal and Bina, respectively?

Accepted Answer

B. Amal: Intrinsic; Bina: Extrinsic — Amal's motivation stems from internal satisfaction and interest, characteristic of intrinsic motivation. Bina's motivation is driven by external factors like exams and rewards, which is extrinsic motivation. Achievement and affiliation are broader motivational theories, and self-efficacy relates to belief in one's ability, while compliance is a behavior, not a primary motivational type in this context.

Answer

A. Amal: Extrinsic; Bina: Intrinsic

Answer

C. Amal: Achievement; Bina: Affiliation

Answer

D. Amal: Self-efficacy; Bina: Compliance

Question 6

Which of the following reformers is known for founding the 'Sadhu Jana Paripalana Sangham' to uplift the depressed classes in Kerala during the early 20th century?

Accepted Answer

B. Ayyankali — Ayyankali founded the Sadhu Jana Paripalana Sangham in 1907 to address the social and educational upliftment of the depressed classes in Kerala. Chattampi Swamikal was a social reformer but not associated with this organisation. Vagbhatananda worked for the renaissance of Ezhava community but not through this sangham. K. Kelappan was a prominent Gandhian leader and not directly linked to this initiative.

Answer

A. Chattampi Swamikal

Answer

C. Vagbhatananda

Answer

D. K. Kelappan

Question 7

Christopher Columbus reached the Americas in:‌​‍

Accepted Answer

1492 — Columbus landed in Caribbean (Bahamas) on 12 October 1492 under Spanish flag. ‌​‍Mistakenly thought he reached India. Triggered European colonisation of Americas.

Answer

1498

Answer

1453

Answer

1522

Question 8

The simplest hydrocarbon is:

Accepted Answer

Methane — CH₄ — one carbon, four hydrogens — simplest alkane.

Answer

Ethane

Answer

Ethene

Answer

Ethyne

Question 9

Barium sulfate is commonly used as a contrast agent in gastrointestinal imaging. Its suitability for this purpose is primarily due to its:

Accepted Answer

C. High atomic number and insolubility, making it opaque to X-rays and non-absorbable. — Barium sulfate is effective as a GI contrast agent because its high atomic number provides good X-ray attenuation (opacity), and its extreme insolubility prevents systemic absorption, thus minimizing toxicity and making it safe for oral or rectal administration. High solubility would lead to absorption and toxicity, it does not emit gamma radiation, and its primary role is not anti-inflammatory.

Answer

A. High solubility in water, allowing for easy absorption.

Answer

B. Ability to emit gamma radiation for detection.

Answer

D. Potent anti-inflammatory properties that reduce gut irritation.

Question 10

Transcription:‌​‍

Accepted Answer

DNA to RNA — DNA → mRNA.‌​‍

Answer

Protein to RNA

Answer

RNA to protein

Answer

DNA to DNA

DCOA Mixed Practice Test #445