VFA Mixed Practice Test #84

Question 1

Kepler's third law: T² ∝:‌​‍

Accepted Answer

r³ — T² = 4π²r³/(GM). Basis of planetary period-distance relationship.‌​‍

Answer

r

Answer

r⁴

Answer

r²

Question 2

The opposite gender of 'bull' is:

Accepted Answer

Cow — Bull (male) ↔ cow (female); calf = young; ox = castrated bull.

Answer

Calf

Answer

Ox

Answer

Heifer

Question 3

Cell wall in plant cells made of:‌​‍

Accepted Answer

Cellulose — Cellulose.‌​‍

Answer

Chitin

Answer

Protein

Answer

Lipid

Question 4

Which of the following drug classes primarily works by blocking the H2 receptors on gastric parietal cells, thereby reducing gastric acid secretion?

Accepted Answer

C. H2 Receptor Antagonists — H2 Receptor Antagonists (e.g., Ranitidine, Famotidine) specifically block histamine-2 receptors on the parietal cells, which reduces acid production. Proton Pump Inhibitors (PPIs) work by irreversibly blocking the H+/K+ ATPase pump. Antacids neutralize existing stomach acid, and Prostaglandin Analogs (e.g., Misoprostol) enhance mucosal protection and inhibit acid secretion through a different mechanism.

Answer

A. Proton Pump Inhibitors (PPIs)

Answer

B. Antacids

Answer

D. Prostaglandin Analogs

Question 5

A teacher conducting action research on improving student participation in group discussions is reflecting on the process. Which statement accurately highlights a key characteristic or benefit of action research for her professional development?

Accepted Answer

B. It allows the teacher to become a critical inquirer into her own practice, leading to continuous improvement. — Action research empowers teachers to critically examine their own teaching, identify problems, implement solutions, and reflect on the outcomes. This cyclical process fosters continuous professional development by making teachers reflective practitioners who actively improve their classroom practices, rather than generating universal theories or being a one-time event.

Answer

A. It primarily generates abstract theories that can be universally applied without modification.

Answer

C. It is a one-time project designed to solve a problem definitively, rather than an ongoing process.

Answer

D. Its main purpose is to compare her teaching methods with those of other schools to establish best practices.

Question 6

Takazhi Sivasankara Pillai — Jnanpith:‌​‍

Accepted Answer

1984 — Won 1984.‌​‍

Answer

2001

Answer

1978

Answer

1990

Question 7

How many triangles are there in a typical Star of David?‌​‍

Accepted Answer

8 — Standard answer.‌​‍

Answer

10

Answer

6

Answer

12

Question 8

Kerala's mobile penetration:‌​‍

Accepted Answer

Near 100% — High mobile and internet penetration.‌​‍

Answer

50%

Answer

Unknown

Answer

Low

Question 9

'I am reading an interesting book now.' Passive:

Accepted Answer

An interesting book is being read by me now — Present continuous passive: is/are + being + past participle.

Answer

An interesting book is read by me

Answer

An interesting book is read now

Answer

An interesting book has been read by me

Question 10

Which structural feature is essential for the antibacterial activity of sulfonamides, acting as a para-aminobenzoic acid (PABA) analog?

Accepted Answer

A. The presence of a primary amino group (-NH2) at the para position to the sulfonyl group. — Sulfonamides exert their antibacterial effect by mimicking PABA, which is a substrate for bacterial dihydropteroate synthase. The primary amino group at the para position to the sulfonyl group is crucial for this competitive inhibition, blocking bacterial folic acid synthesis. Other modifications would typically reduce or abolish activity.

Answer

B. A secondary amino group (-NHR) at the meta position to the sulfonyl group.

Answer

C. A carboxylic acid group (-COOH) attached to the benzene ring.

Answer

D. An alkyl group attached to the sulfonyl nitrogen.

VFA Mixed Practice Test #84