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Questions and Answers
Which of the following is considered a nucleoside?
What is the guanosine concentration in a DNA molecule if the thymine concentration is 30%?
What sugar is present in RNA?
What structure forms when DNA wraps around histones?
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What is the packing ratio in a 30 nm chromatin fiber?
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Study Notes
Nucleosides
- Adenosine is a nucleoside.
Nucleotides
- AMP (Adenosine monophosphate) is a purine nucleotide.
DNA Composition
- In a DNA molecule, the concentration of guanine is equal to the concentration of cytosine.
- Thymine and adenine are paired in DNA, with a concentration ratio of 1:1.
- If the concentration of thymine is 30%, then the concentration of guanine will be 20%.
RNA Structure
- RNA contains the sugar ribose.
DNA Packaging
- The simplest unit of DNA-protein integration is a nucleosome.
- A nucleosome is a bead-like structure formed by DNA wrapping around histone proteins.
- The diameter of a nucleosome is 11 nm.
- Histones are proteins aiding in DNA packaging.
- The 30 nm chromatin fiber has a packing ratio of 6 fold.
- The diameter of a chromatin fiber is 30 nm.
- Scaffold proteins help in rosette formation.
- H1 histone is involved in linking nucleosomes to form a 30 nm fiber.
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Description
Test your knowledge on nucleosides, nucleotides, and the structure of DNA and RNA. This quiz covers DNA composition, the role of histone proteins, and nucleosome formation. Prepare to challenge your understanding of molecular biology concepts!
