LGS Mixed Practice Test #770

Question 1

Which of the following is the primary buffer system in the blood that helps maintain physiological pH?

Accepted Answer

A. Bicarbonate buffer system — The bicarbonate buffer system is the primary buffer in blood due to its high concentration and rapid response to pH changes. Other buffers like hemoglobin and proteins also contribute but are secondary in maintaining systemic pH. The phosphate buffer system is more active in urine and intracellular fluids.

Answer

B. Phosphate buffer system

Answer

C. Protein buffer system

Answer

D. Hemoglobin buffer system

Question 2

Balmer series of hydrogen falls in:‌​‍

Accepted Answer

Visible — Transitions to n=2. Lyman (n=1): UV. Paschen (n=3): IR.‌​‍

Answer

IR

Answer

Microwave

Answer

UV

Question 3

The Kerala Land Reform Act was passed in:‌​‍

Accepted Answer

1969 — The Kerala Land Reforms (Amendment) Act 1969 abolished landlordism and redistributed land.‌​‍

Answer

1957

Answer

1963

Answer

1975

Question 4

COVID-19 first reported in:‌​‍

Accepted Answer

Wuhan, China 2019 — Wuhan, China, December 2019.‌​‍

Answer

Italy

Answer

USA

Answer

India

Question 5

The first tribal woman President of India is:‌​‍

Accepted Answer

Droupadi Murmu — Droupadi Murmu (Santhal community, Odisha) sworn in as 15th President on 25 July 2022. ‌​‍First tribal and 2nd woman President.

Answer

Sonia Gandhi

Answer

Pratibha Patil

Answer

Sushma Swaraj

Question 6

Ajanta caves are:

Accepted Answer

Buddhist — Buddhist murals and paintings.

Answer

Hindu

Answer

Jain

Answer

All three

Question 7

David Ausubel's theory of meaningful learning suggests that new information is most effectively learned when it is related to existing knowledge. Which of the following teaching strategies aligns best with Ausubel's theory?

Accepted Answer

B. Using advance organizers to connect new material with prior knowledge — Ausubel emphasized the use of advance organizers—structured materials presented before learning—to bridge new information with existing cognitive structures. Memorization (A), strict discipline (C), and exclusive experiential learning (D) do not align with his focus on meaningful learning through conceptual connections.

Answer

A. Encouraging students to memorize facts through repetition

Answer

C. Implementing strict discipline to ensure focus during lessons

Answer

D. Focusing exclusively on hands-on, experiential learning activities

Question 8

The Travancore-Cochin state, merging the two princely states, came into being on:

Accepted Answer

1 July 1949 — Travancore and Cochin merged to form Travancore-Cochin on 1 July 1949; it became Kerala in 1956.

Answer

15 August 1947

Answer

26 January 1950

Answer

1 November 1956

Question 9

Indole alkaloids, such as reserpine and vinca alkaloids, are derived from which of the following amino acid precursors?

Accepted Answer

D. Tryptophan — Tryptophan is the primary amino acid precursor for the biosynthesis of indole alkaloids, which include important drugs like reserpine and vinca alkaloids. Tyrosine is a precursor for isoquinoline alkaloids, ornithine for tropane alkaloids, and lysine for quinolizidine and piperidine alkaloids.

Answer

A. Tyrosine

Answer

B. Ornithine

Answer

C. Lysine

Question 10

Deepest freshwater lake:

Accepted Answer

Baikal — Baikal 1642m.

Answer

Tanganyika

Answer

Vostok

Answer

Issyk-Kul

LGS Mixed Practice Test #770