DCOA Mixed Practice Test #759

Question 1

Steroid hormones, such as cortisol and estrogen, typically exert their effects by binding to which type of receptor?

Accepted Answer

B. Intracellular receptors — Steroid hormones are lipid-soluble and can readily cross cell membranes. They bind to specific intracellular receptors in the cytoplasm or nucleus, which then act as transcription factors to regulate gene expression. Other receptor types are typically for water-soluble hormones or neurotransmitters.

Answer

A. G-protein coupled receptors (GPCRs)

Answer

C. Ligand-gated ion channels

Answer

D. Receptor tyrosine kinases

Question 2

Which tree is generally grown for forestation?

Accepted Answer

Teak — Teak is widely planted for commercial afforestation.

Answer

Mango Tree

Answer

Coconut Tree

Answer

Banyan

Question 3

A nuclear family consists of:‌​‍

Accepted Answer

Parents + unmarried children — Trend in urban India. Reasons: migration, housing cost, women's work. Traditional joint family still in rural areas.

Answer

Joint

Answer

Only parents

Answer

Only children

Question 4

One word: Repetition of initial consonants:

Accepted Answer

Alliteration — Alliteration.

Answer

Assonance

Answer

Rhyme

Answer

Meter

Question 5

What is the distance of the Lagrange point L1 of the Sun-Earth system?‌​‍

Accepted Answer

1.5 million km from the Earth — L1 is ~1.5 million km (0.01 AU) from Earth towards the Sun — Aditya-L1's destination.‌​‍

Answer

1.5 million km from the Sun

Answer

1.5 lakh km from the Sun

Answer

1.5 lakh km from the Earth

Question 6

Effective hand hygiene, especially before preparing food and after using the restroom, is a fundamental practice in preventing the spread of infectious diseases. Which mode of disease transmission is most directly targeted by this practice?

Accepted Answer

C. Fecal-oral transmission — Fecal-oral transmission occurs when pathogens from feces are ingested, often due to contaminated hands, food, or water. Practicing effective hand hygiene, especially after using the restroom and before handling food, directly breaks this chain of transmission, preventing the ingestion of harmful microorganisms. While it helps with droplet transmission, its primary impact is on fecal-oral.

Answer

A. Airborne transmission

Answer

B. Vector-borne transmission

Answer

D. Droplet transmission

Question 7

Which statements about the Vaikom Satyagraha are correct? ‌​‍(I) E.V. Ramaswami Naicker was arrested in connection with it (II) It continued during the 1924 flood (III) Assembly voted 22 for, 21 against on 7 Feb 1925

Accepted Answer

Only I and II — All three facts are historically accurate — Vaikom Satyagraha (1924–25).‌​‍

Answer

Only II and III

Answer

Only I and III

Answer

I, II and III

Question 8

The book 'Malabar Manual' was written by:‌​‍

Accepted Answer

William Logan — William Logan wrote the 'Malabar Manual' (1887), a comprehensive historical and administrative account of the Malabar district. ‌​‍It remains an important reference for Kerala history.

Answer

Robert Bristow

Answer

Francis Day

Answer

Bartholomew

Question 9

If it rains, I ___ at home.‌​‍

Accepted Answer

will stay — Type 1 conditional: If + present → will + V1.‌​‍

Answer

stay

Answer

would stay

Answer

stayed

Question 10

Boyle's law states (at constant temperature):

Accepted Answer

PV = constant — Boyle's law: P ∝ 1/V at constant T (PV = constant).

Answer

P/V = constant

Answer

V/P = constant

Answer

V + P = constant

DCOA Mixed Practice Test #759