VFA Mixed Practice Test #595

Question 1

Human gestation period:

Accepted Answer

280 days (~40 weeks) — From last menstrual period (LMP). Embryo → fetus at 8 weeks. Parturition involves oxytocin surge.

Answer

200 days

Answer

365 days

Answer

100 days

Question 2

A newborn infant receives antibodies from their mother through the placenta and later through breast milk. This type of immunity provides immediate, but temporary, protection against certain pathogens, without the infant's own immune system actively producing antibodies. What type of immunity is this?

Accepted Answer

C. Naturally acquired passive immunity. — This describes naturally acquired passive immunity. 'Naturally acquired' refers to the transfer of antibodies through natural processes like the placenta or breast milk, and 'passive' means the individual receives pre-formed antibodies rather than producing their own. This provides immediate but temporary protection. Active immunity (Options A and B) involves the body's own immune system producing antibodies, while artificially acquired immunity (Options B and D) involves medical interventions like vaccination or antitoxin injections.

Answer

A. Naturally acquired active immunity.

Answer

B. Artificially acquired active immunity.

Answer

D. Artificially acquired passive immunity.

Question 3

Dialysis:

Accepted Answer

Artificial filtration — Replaces kidney function.

Answer

Surgery

Answer

Implant

Answer

Medication

Question 4

Which is NOT a colligative property?

Accepted Answer

Viscosity — Colligative properties depend on particle number: ΔTb, ΔTf, osmotic pressure, vapour pressure lowering.

Answer

Boiling point elevation

Answer

Freezing point depression

Answer

Osmotic pressure

Question 5

Vallathol founded Kerala Kalamandalam in:

Accepted Answer

1930 — Kerala Kalamandalam founded 1930 by Mahakavi Vallathol.

Answer

1920

Answer

1940

Answer

1950

Question 6

Hardy-Weinberg principle requires:‌​‍

Accepted Answer

No migration, no mutation, large random-mating population, no selection, no drift — Allele frequencies stay constant. ‌​‍p² + 2pq + q² = 1. Deviations indicate evolution.

Answer

Small population

Answer

Migration

Answer

Mutation

Question 7

In which year Sree Narayana Guru formed S.N.D.P. Yogam?

Accepted Answer

1903 — Sree Narayana Dharma Paripalana Yogam founded 15 May 1903.

Answer

1900

Answer

1901

Answer

1907

Question 8

Neeraj Chopra 2024 gold at:‌​‍

Accepted Answer

Paris Olympic silver — Paris Olympics silver (gold was Tokyo 2020).‌​‍

Answer

Asian

Answer

Diamond League

Answer

World Athletics

Question 9

Skin layers:

Accepted Answer

Epidermis, dermis, hypodermis — Three main layers.

Answer

Only one

Answer

Two

Answer

Four

Question 10

Nitrogen cycle bacteria:

Accepted Answer

Rhizobium, Nitrosomonas — Various nitrogen-fixing/nitrifying bacteria.

Answer

Only Rhizobium

Answer

E. coli

Answer

Staphylococcus

VFA Mixed Practice Test #595