Question

Which one of the following is NOT needed to construct solenoid fibre?

• A. Nucleosome
• B. DNA molecule
• C. RNA molecule
• D. Basic proteins histones

Hint:

Solenoid fibres are formed by the packaging of DNA into nucleosomes, which are made up of histone proteins. RNA does not directly participate in this structure.

Answer 1

The Correct Option is C

Step 1: Understanding the construction of solenoid fibre.
The solenoid fibre is a higher-order structure of chromatin. It is primarily composed of nucleosomes, DNA molecules, and histones. RNA molecules are not directly involved in the construction of solenoid fibres.
Step 2: Analyzing the options.
(A) Nucleosome: Incorrect. Nucleosomes are essential for the formation of solenoid fibres.
(B) DNA molecule: Incorrect. DNA is a critical component in the construction of solenoid fibres.
(C) RNA molecule: Correct. RNA molecules are not directly involved in the construction of solenoid fibres.
(D) Basic proteins histones: Incorrect. Histones are essential for the packaging of DNA into nucleosomes, which form solenoid fibres.
Step 3: Conclusion.
The correct answer is (C) RNA molecule, as RNA is not needed for the construction of solenoid fibres.