Biology 9- structure and replication of DNA
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Created by:
hwilkins13597 on February 22, 2012
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27 terms
Terms | Definitions |
|---|---|
 DNA stands for | Deoxyribonucleic acid |
| Type of molecule | Nucleic acid |
| Type of monomer | Nucleotide |
| Nucleotide consists of a | 5carbon sugar, phosphate group and a base |
| The four bases are | Adenine, thymine, cytosine and guanine |
| The single ringed bases are called | Pyrmidines |
| The bases in a Pyrmidine are | Thymine and cytosine |
| The double ringed bases are called | Purines |
| The bases in a purine are | Adenine and guanine |
| Who discovered the nucleotide? | Watson and crick |
| The DNA is in the shape of a | Double helix |
| Bases are held together by | Hydrogen bonds |
| The are _______ base pairs in the human genome | 3 billion |
| When does DNA replicate? | During interphase (synthesis) |
| Where does DNA replicate? | In nucleus |
| What is the purpose of DNA replication? | Increase the amount of DNAto split DNAequallyto the daughter cells |
| The enzyme called ______ untwists DNA helix and unzips 2 strands by breaking hydrogen bonds | Helicase |
| The enzyme called ______ matches up free nucleotides in nucleus to parent strands to create 2 new strands | DNA polymerase |
| How many nucleotides are made per second? | 60 |
| DNA replication is | Semi conservative |
| Semi conservative is | Each new strand is half old half new |
| The last step is | 2 new strands retwist into a helix |
| The first step is | Helicase |
| The second step is | DNA polymerase |
| The third step is | Semi conservative |
| helicase | untwists DNA helix and unzips 2 strands by breaking hydrogen bonds between rungs |
| DNA polymerase | matches up free nucleotides in nucleus to parent strands to create 2 new strands |
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