VFA Mixed Practice Test #372

Question 1

The Cultural Revolution in China was launched by Mao in:‌​‍

Accepted Answer

1966 — Great Proletarian Cultural Revolution (1966-76) — Mao's purge to reassert communist ideology. ‌​‍Chaos, 1-2 million deaths, economic damage.

Answer

1976

Answer

1949

Answer

1958

Question 2

Kumarakom Bird Sanctuary is near:‌​‍

Accepted Answer

Vembanad Lake — Kumarakom Bird Sanctuary on Vembanad Lake, Kottayam.‌​‍

Answer

Ashtamudi Lake

Answer

Periyar Lake

Answer

Sasthamkotta Lake

Question 3

Apache helicopters India:‌​‍

Accepted Answer

Indian Army and Air Force — Both services.‌​‍

Answer

Only AF

Answer

None

Answer

Navy

Question 4

DNA fingerprinting was developed by:‌​‍

Accepted Answer

Alec Jeffreys (1984) — Based on VNTRs. ‌​‍Used in forensics, paternity, conservation. Indian version — Lalji Singh (CCMB Hyderabad).

Answer

Watson

Answer

Darwin

Answer

Mendel

Question 5

Speed of electromagnetic waves in vacuum:‌​‍

Accepted Answer

3 × 10⁸ m/s — c = 1/√(μ₀ε₀). ‌​‍Maxwell predicted; Hertz confirmed. All EM waves travel at c in vacuum.

Answer

1.5 × 10⁸

Answer

3 × 10¹⁰

Answer

3 × 10⁶

Question 6

Biopesticide Bacillus thuringiensis (Bt) produces:‌​‍

Accepted Answer

Cry toxins — kills larvae of moths/butterflies — Specific to insect gut. ‌​‍Bt cotton, Bt brinjal use transgenic Bt gene. Safe for humans (no receptors in our gut).

Answer

Virus

Answer

Antibiotics

Answer

Enzymes

Question 7

In a patient with suspected acute pancreatitis, which of the following biochemical markers is most specific for confirming the diagnosis?

Accepted Answer

B. Serum lipase — Serum lipase is more specific than amylase for acute pancreatitis as it remains elevated longer and is less affected by other conditions like salivary gland disorders. Amylase can be elevated in other abdominal pathologies, while LDH and ALP are non-specific markers.

Answer

A. Serum amylase

Answer

C. Serum lactate dehydrogenase (LDH)

Answer

D. Serum alkaline phosphatase (ALP)

Question 8

Baking soda chemical name:‌​‍

Accepted Answer

Sodium bicarbonate — NaHCO₃ — Sodium bicarbonate (Sodium hydrogen carbonate).‌​‍

Answer

Sodium hydroxide

Answer

Sodium carbonate

Answer

Sodium chloride

Question 9

The first country to land on the far side of the Moon:‌​‍

Accepted Answer

China — China's Chang'e 4 landed on the far side of the Moon in January 2019.‌​‍

Answer

USA

Answer

Russia

Answer

India

Question 10

Most abundant metal in crust:‌​‍

Accepted Answer

Aluminium — Aluminium (~8%).‌​‍

Answer

Iron

Answer

Copper

Answer

Gold

VFA Mixed Practice Test #372