DNA Replication and Protein Synthesis
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18 terms
Terms | Definitions |
|---|---|
 cell division | DNA copies itself before |
| First stage of self replication | The hydrogen bonds between the two polynucleotide DNA strands break. The helix unzips to form two single strands |
| Second stage of self replication | Each original strand acts as a template for a new strand. Free floating DNA nucleotides join to the exposed bases by complementary base pairing (A with T) (C with G) |
| Third stage of self replication | The nucleotides on the new strand are joined together by the enzyme DNA polymerase. Hydrogen bonds form between the bases on the original and new strand. |
| Fourth stage of self replication | Each new DNA molecules contains one original strand and one new strand. |
| semi-conservative replication | Replication of the DNA when half of the new strands of DNA are from the orginal piece of DNA |
| DNA is is copied before cell division | so that each new cell has the full amount of DNA |
| Polypeptide is another word for | Protein |
| gene | sequence of DNA nucleotides that codes for a protein (polypeptide) |
| proteins are made from | amino acids |
| different proteins have | a different number and order of amino acids |
| order of nucleotide bases in a gene determines | order of amino acids in a particular protein |
| each amino acid is coded for by | three bases in a gene |
| Protein Synthesis | DNA is copied into RNA for |
| grow and develop | proteins are important in living organisms order to |
| Nucleus | DNA is found in the |
| Too large | DNA doesnt move out of the nucleus because it is |
| leave the nucleus and join a ribosome where it can be used to synthesise a protein | DNA is copied into RNA so it can |
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