DNA
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What are the components of a nucleotide?
A phosphate ion, a 2-deoxyribose sugar and a nitrogen - containing base
What bases are found in DNA?
Adenine, thymine, cytosine and guanine
How are the components of a nucleotide arranged?
A phosphate ion is bonded to 2-deoxyribose, which is bonded to a base
What is a single strand of DNA?
A polymer of nucletoides
How are nucleotides joined in a DNA strand?
By covalent bonds between the phosphate group of one nucleotide ad the 2-deoxyribose of another
What makes up the backbone of a DNA. strand?
The sugar phosphate backbone
Name of the bond linking nucleotides?
Phosphodiester bond
What is the overall structure of DNA?
Two complementary strands forming a double helix
What does complementary base pairing mean?
Speciifc bases pair together; adenine with thymine and cytosine with guanine
How many hydrogen bonds form between adenine and thymine/cytosine and guanine?
Adenine and thymine form 2 hydrogen bonds, whereas cytosine and guanine only forms 3 hydrogen bonds
What types of bonds hold the DNA base pairs together?
Hydrogen bonds between the base pairs
What type of bonds hold each DNA strand together?
Covalent (phosphodiester) bonds int he backbone