2.1: Structure of RNA and DNA
Nucleotides consist of a phosphate group, a pentose sugar, and a nitrogenous base. DNA is a stable, double-stranded helix held together by hydrogen bonds, with a sugar-phosphate backbone. Its structure enables it to store genetic information, replicate accurately, and pass traits across generations.
Describe the structure of a nucleotide
A pentose sugar (deoxyribose)
A phosphate group
A nitrogen containing organic base
Key Terms
Describe the structure of a nucleotide
A pentose sugar (deoxyribose)
A phosphate group
A nitrogen containing organic base
Describe how a dinucleotide is formed
Condensation reactions between two mono nucleotides
Phosphodiester bond forms between the deoxyribose of one mono nucleotide and the phosphate g...
What is the pentose sugar in RNA?
ribose
Describe the structure of DNA
Two parallel nucleotide strands help together by hydrogen bonds between the organic bases
...
-The two strains twist into a double helix
Why is DNA a stable molecule?
The phosphodiester backbone protects the more chemicaly reactive organic bases inside the double helix
-Hydrogen bonds link the organic ...
How does the structure of DNA relate to its function?
-Its two separate strands are only joined by hydrogen bonds which allow them to separate during DNA replication
-Large molecule-carries alot of ...
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| Term | Definition |
|---|---|
Describe the structure of a nucleotide |
|
Describe how a dinucleotide is formed | Condensation reactions between two mono nucleotides |
What is the pentose sugar in RNA? | ribose |
Describe the structure of DNA |
|
Why is DNA a stable molecule? |
|
How does the structure of DNA relate to its function? | -Its two separate strands are only joined by hydrogen bonds which allow them to separate during DNA replication |