LGS Mixed Practice Test #168

Question 1

An enzyme's activity is highly dependent on its three-dimensional structure. Which of the following factors, if altered significantly, is most likely to cause irreversible denaturation of an enzyme, leading to loss of its catalytic function?

Accepted Answer

C. Extreme temperature changes. — Extreme changes in temperature (or pH) can disrupt the weak bonds maintaining an enzyme's specific three-dimensional structure, leading to irreversible denaturation and loss of function. Substrate concentration changes or competitive inhibitors affect reaction rate but do not typically cause irreversible structural damage to the enzyme itself. Optimal pH adjustment would enhance, not harm, enzyme activity.

Answer

A. Slight increase in substrate concentration.

Answer

B. Optimal pH adjustment.

Answer

D. Presence of a competitive inhibitor.

Question 2

AAP (Aam Aadmi Party) was founded by Arvind Kejriwal in:‌​‍

Accepted Answer

2012 — AAP formed on 26 November 2012, Constitution Day. ‌​‍Won Delhi Assembly elections in 2013, 2015, 2020.

Answer

2013

Answer

2011

Answer

2014

Question 3

The Enlightenment (Age of Reason) occurred in:‌​‍

Accepted Answer

17th-18th C — Enlightenment (1680s-1780s) — Locke, Voltaire, Rousseau, Kant, Newton, Diderot. ‌​‍Reason, science, liberty, progress — inspired American and French Revolutions.

Answer

19th C

Answer

14th-15th C

Answer

20th C

Question 4

Calicut had Zamorin dynasty:‌​‍

Accepted Answer

Yes — Zamorins ruled till British era.‌​‍

Answer

Only one ruler

Answer

Partial

Answer

No

Question 5

Which Kerala district does NOT border Vembanad Lake?

Accepted Answer

Kollam — Vembanad touches Alappuzha, Kottayam and Ernakulam but not Kollam.

Answer

Alappuzha

Answer

Kottayam

Answer

Ernakulam

Question 6

A web page primarily uses which language for structure?

Accepted Answer

HTML — HTML provides structure; CSS styles; JS makes it interactive.

Answer

CSS

Answer

JavaScript

Answer

Python

Question 7

Azad Hind Fauj women wing:

Accepted Answer

Rani of Jhansi Regiment — Led by Capt. Lakshmi Sehgal.

Answer

Durga Dal

Answer

Mahila Sena

Answer

Swaraj Dal

Question 8

Polymer of ethene (CH₂=CH₂) is called:‌​‍

Accepted Answer

Polythene — Polythene/polyethylene = (−CH₂−CH₂−)ₙ formed by addition polymerisation of ethene.‌​‍

Answer

PVC

Answer

Nylon

Answer

Polyester

Question 9

The study of fungi is called:‌​‍

Accepted Answer

Mycology — Mycology = study of fungi. Virology = viruses. Ecology = ecosystems.‌​‍

Answer

Ecology

Answer

Virology

Answer

Botany

Question 10

Sugarcane belt:

Accepted Answer

UP, Maharashtra, Karnataka — Multiple states.

Answer

Only UP

Answer

Only Maharashtra

Answer

Punjab

LGS Mixed Practice Test #168