Plus 2 Lecturer Mixed Practice Test #639

Question 1

Which of the following best explains the genetic basis of sickle cell anemia?

Accepted Answer

B. A missense mutation in the HBB gene causing a substitution of valine for glutamic acid at the 6th position of the beta-globin chain. — Sickle cell anemia is caused by a point mutation (missense mutation) in the HBB gene, where valine replaces glutamic acid at the 6th position of the beta-globin chain. This alters the hemoglobin structure, leading to sickling of red blood cells under low oxygen conditions. Options A, C, and D describe different types of mutations that do not correspond to the actual cause of sickle cell anemia.

Answer

A. A deletion mutation in the HBB gene leading to the absence of beta-globin chains.

Answer

C. A frameshift mutation in the HBB gene resulting in a completely non-functional beta-globin protein.

Answer

D. A nonsense mutation in the HBB gene truncating the beta-globin protein prematurely.

Question 2

Melpathur Narayana Bhattathiri:‌​‍

Accepted Answer

Narayaneeyam — Narayaneeyam — 1586 CE.‌​‍

Answer

Rig Veda

Answer

Brahmanda Purana

Answer

Sanskrit

Question 3

The National Education Policy (NEP) 2020 proposes a significant structural change in school education from the existing 10+2 system. What is the new pedagogical and curricular restructuring proposed?

Accepted Answer

A. 5+3+3+4 structure — NEP 2020 introduces a new 5+3+3+4 curricular and pedagogical structure. This corresponds to the Foundational Stage (3-8 years), Preparatory Stage (8-11 years), Middle Stage (11-14 years), and Secondary Stage (14-18 years). The other options represent incorrect combinations of this proposed structure.

Answer

B. 3+5+3+4 structure

Answer

C. 5+3+4+3 structure

Answer

D. 4+3+3+5 structure

Question 4

Which of the following is a key feature of the urea cycle?

Accepted Answer

D. Converts ammonia to urea for excretion — The urea cycle converts toxic ammonia (from protein metabolism) into urea for renal excretion. It occurs partly in mitochondria and partly in the cytoplasm (A), uses N-acetylglutamate (not biotin) (B), and does not produce ammonia (C).

Answer

A. Occurs entirely in the cytoplasm

Answer

B. Requires biotin as a cofactor

Answer

C. Produces ammonia as a byproduct

Question 5

Many antibiotics target bacterial ribosomes to inhibit protein synthesis, thereby killing the bacteria. This mechanism exploits the structural differences between bacterial and human ribosomes. Which of the following organelles in human cells is primarily responsible for protein synthesis?

Accepted Answer

D. Ribosomes — Ribosomes are the cellular organelles responsible for protein synthesis (translation) in both prokaryotic (bacteria) and eukaryotic (human) cells. While the endoplasmic reticulum is involved in processing and transporting proteins, the actual synthesis occurs on ribosomes, either free in the cytoplasm or attached to the ER. Mitochondria are for energy production, and the nucleus houses genetic material.

Answer

A. Mitochondria

Answer

B. Nucleus

Answer

C. Endoplasmic Reticulum

Question 6

Atal Innovation Mission (AIM) establishes which innovation labs in schools?‌​‍

Accepted Answer

Atal Tinkering Labs — AIM establishes Atal Tinkering Labs (ATLs) in schools to foster innovation and entrepreneurship among students.‌​‍

Answer

Smart Labs

Answer

DRDO Labs

Answer

ISRO Labs

Question 7

UN Secretary-General (current):‌​‍

Accepted Answer

António Guterres — António Guterres (since 2017).‌​‍

Answer

Ban Ki-moon

Answer

Kofi Annan

Answer

Javier Pérez

Question 8

National Education Day is celebrated annually in India on November 11th to commemorate the birth anniversary of Maulana Abul Kalam Azad, India's first Education Minister. Given his vision and contributions to the nascent Indian education system, which of the following initiatives would be *most consistent* with the ideals he championed?

Accepted Answer

B. Prioritizing universal primary education, adult literacy, and the development of institutions for higher and technical learning. — Maulana Abul Kalam Azad was a strong proponent of universal primary education, adult literacy, and the establishment of robust institutions for higher and technical education, including the IITs and the UGC. Option B directly reflects these foundational contributions to modern Indian education. Options A, C, and D contradict his inclusive and progressive vision for national education.

Answer

A. Establishing an education system solely focused on preserving traditional religious texts and practices.

Answer

C. Advocating for a completely decentralized education policy with no central government oversight or funding.

Answer

D. Limiting access to higher education to only those from specific socio-economic backgrounds to maintain exclusivity.

Question 9

The Declaration of Independence (USA) was primarily drafted by:‌​‍

Accepted Answer

Thomas Jefferson — Thomas Jefferson drafted (June 1776); revised by Franklin, Adams, Livingston, Sherman. ‌​‍Adopted 4 July 1776.

Answer

John Adams

Answer

Benjamin Franklin

Answer

George Washington

Question 10

In reported speech, what does 'said that' indicate?‌​‍

Accepted Answer

Indicates indirect speech — E.g., 'He said, "I am tired"' → 'He said that he was tired.' 'That' often optional after 'said'.‌​‍

Answer

Direct

Answer

Question

Answer

Exclamation

Plus 2 Lecturer Mixed Practice Test #639