KAS Prelims Mixed Practice Test #38

Question 1

Polaroid absorbs:

Accepted Answer

Light polarised perpendicular to transmission axis — Malus's law: I = I₀ cos²θ. Natural light is unpolarised; Polaroid makes it 50% intensity, linearly polarised.

Answer

All light

Answer

Only red

Answer

Only UV

Question 2

Choose correct form: 'I prefer tea ___ coffee.'

Accepted Answer

to — 'Prefer X to Y' (not 'than'): fixed pattern.

Answer

than

Answer

over

Answer

from

Question 3

Adrenaline is secreted by the:

Accepted Answer

Adrenal gland (medulla) — Adrenaline (epinephrine) from adrenal medulla mediates the 'fight or flight' response.

Answer

Thyroid

Answer

Pancreas

Answer

Pituitary

Question 4

The Chauri Chaura incident (February 1922) led Gandhi to:‌​‍

Accepted Answer

Suspend the Non-Cooperation Movement — After protesters burned a police station (Chauri Chaura), Gandhi suspended the movement citing violence.‌​‍

Answer

Launch Quit India

Answer

Boycott Simon

Answer

Start Salt March

Question 5

The windward side of the Western Ghats receives heavy rainfall; the leeward side lies in a:

Accepted Answer

Rain shadow — The Deccan Plateau, east of the Western Ghats, is a rain-shadow area with much lower rainfall.

Answer

Fog belt

Answer

Glacial zone

Answer

Delta region

Question 6

Which of the following functional groups is primarily responsible for the antibacterial activity of penicillin antibiotics?

Accepted Answer

C. Beta-lactam ring — The beta-lactam ring is crucial for the antibacterial activity of penicillins and other beta-lactam antibiotics. It irreversibly inhibits bacterial transpeptidases (penicillin-binding proteins), preventing cell wall synthesis. The other components contribute to the drug's overall structure and pharmacokinetics but are not the primary pharmacophore for antimicrobial action.

Answer

A. Carboxyl group

Answer

B. Thiazolidine ring

Answer

D. Amide linkage

Question 7

International Yoga Day:‌​‍

Accepted Answer

21 Jun — 21 June (declared by UN in 2014).‌​‍

Answer

5 Jun

Answer

21 Mar

Answer

2 Oct

Question 8

Synonym of 'courageous':

Accepted Answer

Brave — Courageous = brave, valiant, fearless.

Answer

Timid

Answer

Weak

Answer

Afraid

Question 9

The Mountbatten Plan (3 June 1947) proposed:‌​‍

Accepted Answer

Partition of India into two dominions — Mountbatten's plan led to partition into India and Pakistan on 15 August 1947.‌​‍

Answer

Monarchy

Answer

Complete unity of India

Answer

Retention of British rule

Question 10

Lamarckism emphasised:‌​‍

Accepted Answer

Inheritance of acquired characteristics — Use and disuse. ‌​‍Example (incorrect): giraffe neck elongated through stretching. Refuted by Weismann's germplasm theory.

Answer

Natural selection

Answer

Mutation

Answer

Genetic drift

KAS Prelims Mixed Practice Test #38