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Questions and Answers
Which of the following is considered a nucleoside? (Select one)
A purine nucleotide is:
In a DNA molecule, if the thymine concentration is 30%, the guanosine concentration will be:
The sugar present in RNA is:
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The simplest unit of DNA-protein integration is:
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The packing ratio in 30 nm chromatin fiber is:
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The diameter of a nucleosome is:
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DNA wraps around histones to form a bead-like structure called:
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Which of the following helps in rosette formation? (Select one)
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The diameter of chromatin fiber is:
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Study Notes
Nucleosides
- A nucleoside is composed of a nitrogenous base and a sugar molecule.
Purine Nucleotide
- A purine nucleotide is a nucleotide that contains a purine base, such as adenine or guanine.
DNA Composition
- If the thymine concentration in a DNA molecule is 30%, the guanosine concentration will also be 30%.
- This is because the nitrogenous bases in DNA pair up with each other: adenine with thymine (A-T) and guanine with cytosine (G-C).
RNA Sugar
- The sugar present in RNA is ribose.
DNA-Protein Integration
- The simplest unit of DNA-protein integration is a nucleosome.
Chromatin Fiber Packing
- The packing ratio in a 30 nm chromatin fiber is approximately 6:1
Nucleosome Structure
- The diameter of a nucleosome is approximately 11 nm.
- DNA wraps around histones to form a bead-like structure called a nucleosome.
Rosette Formation
- Histone H1 helps in rosette formation by linking adjacent nucleosomes, contributing to the 30 nm chromatin fiber.
Chromatin Fiber Diameter
- The diameter of a chromatin fiber is approximately 30 nm.
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Description
Test your knowledge on essential concepts of nucleosides, DNA structure, and chromatin fibers in this quiz. Questions cover topics such as nucleotide composition, DNA-protein interactions, and the physical properties of chromatin. Perfect for anyone studying molecular biology!
