LDC Mixed Practice Test #452

Question 1

The tertiary structure of a protein is critical for its biological function and often determines the specificity of drug binding. Which type of bond or interaction is least likely to contribute significantly to the stabilization of a protein's tertiary structure?

Accepted Answer

D. Peptide bonds — Peptide bonds form the primary structure (amino acid sequence) of a protein, linking amino acids together. While fundamental, they do not directly contribute to the intricate folding and stabilization that defines the tertiary structure. Hydrogen bonds, disulfide bridges, and hydrophobic interactions are all crucial non-covalent and covalent forces that stabilize the unique three-dimensional tertiary structure.

Answer

A. Hydrogen bonds

Answer

B. Disulfide bridges

Answer

C. Hydrophobic interactions

Question 2

Value of sin 30°:

Accepted Answer

1/2 — Common angles: sin 0=0, sin 30=1/2, sin 45=1/√2, sin 60=√3/2, sin 90=1. cos reverses.

Answer

0

Answer

√3/2

Answer

1

Question 3

Judicial review derives from:‌​‍

Accepted Answer

Art 13, 32, 226 — Art 13 (void laws), 32 (SC), 226 (HC).‌​‍

Answer

Art 21

Answer

Art 14

Answer

Art 142

Question 4

A key recommendation of the National Education Policy (NEP) 2020 regarding the medium of instruction, especially at the foundational and preparatory stages, is to promote:

Accepted Answer

B. The mother tongue/local language/regional language as the medium of instruction until at least Grade 5, and preferably till Grade 8 and beyond. — NEP 2020 strongly advocates for the use of the mother tongue/local language/regional language as the medium of instruction in schools, particularly up to Grade 5, and ideally extending to Grade 8 and beyond. This approach aims to enhance learning outcomes and foster multilingualism. Options A and C contradict the policy's emphasis on linguistic diversity and local context, while D overlooks the specific policy recommendation.

Answer

A. English as the sole medium of instruction to ensure global competitiveness.

Answer

C. Hindi as the mandatory medium of instruction across all states for national integration.

Answer

D. Any language chosen by the parents, with no specific emphasis on regional languages.

Question 5

Which quantity is a vector?‌​‍

Accepted Answer

Velocity — Velocity has direction. Speed (magnitude only), mass, time, volume are scalars.‌​‍

Answer

Mass

Answer

Speed

Answer

Time

Question 6

The festival 'Thrissur Pooram' was started by which ruler?‌​‍

Accepted Answer

Sakthan Thampuran — Sakthan Thampuran (Raja Rama Varma) of Cochin reorganised Thrissur Pooram in 1798.‌​‍

Answer

Tipu Sultan

Answer

Dharma Raja

Answer

Marthanda Varma

Question 7

Residuary powers lie with:‌​‍

Accepted Answer

Centre (Parliament) — Article 248 — residuary powers with Parliament (Centre).‌​‍

Answer

Both

Answer

State

Answer

President

Question 8

Which of the following is a common ethical consideration in classroom action research?

Accepted Answer

B. Obtaining informed consent from students and parents — Ethical action research requires transparency and respect for participants, including obtaining informed consent from students and parents (B). The other options are either irrelevant (A), unethical (C), or methodologically flawed (D).

Answer

A. Ensuring the research results are published anonymously

Answer

C. Focusing only on high-performing students for better results

Answer

D. Using experimental groups without control groups

Question 9

PM's salary:‌​‍

Accepted Answer

1.6 lakh — Approximately ₹1.6 lakh/month.‌​‍

Answer

2 lakh

Answer

1 lakh

Answer

2.5 lakh

Question 10

Number of ways to arrange n distinct objects:‌​‍

Accepted Answer

n! — n factorial = n × (n-1) × ... × 1. Permutations P(n,r) = n!/(n-r)!‌​‍

Answer

n²

Answer

n

Answer

2^n

LDC Mixed Practice Test #452