DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. Test your knowledge of this topic by taking the quiz below.
Guanine
Cytosine
Adenine
Uracil
Adenine, Cytosine, Guanine
2 Phosphates and a base
A sugar, adenine, and thymine
A phosphate, a sugar, and a nitrogenous base
2
3
4
5
Phosphates
Sugars
Sugars and bases
Phosphates and sugars
A&T share 3 hydrogen bonds. C&G share 2 hydrogen bonds.
A&T share 2 hydrogen bonds. C&G share 3 hydrogen bonds.
A&T share covalent. C&G share ionic.
A&T share ionic. C&G share covalent.
DNA polymerase
RNA polymerase
Helicase
TRNA
Sugar
Phosphate
Base
DNA
RNA polymerase
Helicase
Double helix
DNA
TACGTACT
UACGUACU
CATAGTAA
TAATUAUAG
A DNA strand pairing with a strand made up of A, C, G, and U
A DNA strand being unwound by helicase
DNA polymerase attaching free nucleotides to strands of DNA
A DNA strand pairing with a strand made up of A, C, G, and T
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