VFA Mixed Practice Test #294

Question 1

One who studies the stars and planets:

Accepted Answer

Astronomer — Astronomy is scientific study of celestial objects.

Answer

Astrologer

Answer

Geologist

Answer

Biologist

Question 2

Kerala's number of grama panchayats:‌​‍

Accepted Answer

941 — 941 grama panchayats.‌​‍

Answer

750

Answer

1200

Answer

500

Question 3

Which lens is used in a simple camera?‌​‍

Accepted Answer

Convex (converging) — Camera uses convex lens to form real inverted image on the film/sensor.‌​‍

Answer

Plain glass

Answer

Cylindrical

Answer

Concave

Question 4

The frequency of AC supply in India is:‌​‍

Accepted Answer

50 Hz — India uses 50 Hz AC; USA uses 60 Hz.‌​‍

Answer

220 Hz

Answer

100 Hz

Answer

60 Hz

Question 5

Which type of joint allows for the greatest range of motion, exemplified by the shoulder and hip joints?

Accepted Answer

C. Ball-and-socket joint — Ball-and-socket joints, such as the shoulder and hip joints, allow for the greatest range of motion, including flexion, extension, abduction, adduction, rotation, and circumduction. Hinge joints (like the elbow) allow movement in one plane, pivot joints (like the atlantoaxial joint) allow rotation, and condyloid joints (like the wrist) allow movement in two planes but no rotation.

Answer

A. Hinge joint

Answer

B. Pivot joint

Answer

D. Condyloid joint

Question 6

The author of 'Wings of Fire' autobiography is:

Accepted Answer

A. P. J. Abdul Kalam — 'Wings of Fire: An Autobiography' (1999) by A. P. J. Abdul Kalam with Arun Tiwari.

Answer

Nelson Mandela

Answer

Malala Yousafzai

Answer

Nehru

Question 7

Ernakulam achieved 100% literacy:

Accepted Answer

1990 — Ernakulam first Indian district 100% literate, 1990.

Answer

1991

Answer

1989

Answer

1995

Question 8

Energy pyramid:

Accepted Answer

Always upright — Energy pyramid is always upright.

Answer

Can invert

Answer

Always inverted

Answer

Constant

Question 9

Black soil is best for:‌​‍

Accepted Answer

Cotton — Cotton. Black soil = Regur soil.‌​‍

Answer

Rice

Answer

Wheat

Answer

Tea

Question 10

Sulfonamides exert their antibacterial action by inhibiting a crucial enzyme in bacterial folate synthesis. Which of the following enzymes is directly targeted by sulfonamides?

Accepted Answer

B. Dihydropteroate synthase — Sulfonamides are structural analogs of p-aminobenzoic acid (PABA) and competitively inhibit dihydropteroate synthase, an enzyme vital for the synthesis of dihydrofolic acid in bacteria. This inhibition prevents the production of folic acid, which is essential for bacterial DNA and RNA synthesis, leading to bacteriostatic effects. Dihydrofolate reductase is inhibited by trimethoprim, not sulfonamides.

Answer

A. Dihydrofolate reductase

Answer

C. Thymidylate synthase

Answer

D. DNA gyrase

VFA Mixed Practice Test #294