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Biology Chapter 16
Terms in this set (22)
What are nucleic acids?
Polynucleotides that are made from nucleotides
What polarity do strands have in DNA?
5' to 3'
What does cytosine (C) pair with?
What does adenine (A) pair with?
What is 5' to 3' polarity always oppositely paired with?
3' to 5'
22% of the bases in a DNA molecule are guanine (G). What % of the bases are thymine (T)?
What are the chemical components of a DNA molecule?
Sugars, Phosphate Groups, Nitrogenous Bases
What does the double Helix Suggest about DNA's properties?
It can change, be replicated, and stores genetic information in its sequences
What's the difference between DNA and RNA?
DNA is double stranded and RNA is single stranded
Which nitrogenous base is found in DNA but not RNA?
What nitrogenous base is found in RNA but not DNA?
Nucleic Acids are assembled in what direction?
5' to 3'
The bonds or interactions that hold together adjacent nucleotides in the sugar-phosphate backbone of DNA are
The bonds or interactions that hold together complementary bases from opposite strands of DNA are
The bonds or interactions between stacked nucleotide units that help hold the DNA molecule together are
van der Waals interactions
Short segments of newly synthesized DNA are joined into a continuous strand by
Binds at the replication fork
Breaks H-bonds between bases
Binds ahead of the replication fork
Breaks covalent bonds in DNA backbone
Single-strand binding protein
Binds after the replication fork
Prevents H-bonds between bases
What materials does DNA polymerase require in order to synthesize a complete strand of DNA?
Single-stranded DNA template, 3'-OH end of the new DNA strand, and all four deoxyribonucleotides triphosphates (containing A, C, T, or G)
What are Okazaki fragments?
The short sections of DNA that are synthesized on the lagging strand of the replicating DNA
What is DNA polymerase?
The enzyme that can replicate DNA
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