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Lezhae Lowder Unit 7
DNA Review
14
Biology
9th Grade
06/05/2013

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Term
Nitrogenous Base
Definition
Nitrogenious base is a part of DNA that includes adenine, guanine, cytosine, thymine, and uracil.
Term
Double Helix
Definition
Double helix is when two DNA strands unite and are held together by hydrogen bonds between the bases.
Term
DNA Replication
Definition
DNA replication is when DNA makes a copy of itself before mitosis or meiosis.
Term
Messenger RNA
Definition
Messenger RNA is RNA that carries information from the DNA inside of the nucleus to the cells cytoplasm.
Term
Ribosomal RNA
Definition
RNA that produces ribosomes it clings to mRNA and uses its information to put amino acids in the correct order.
Term
Transfer RNA
Definition
A form of RNA that takes amino acids to the ribosomes to be made into proteins.
Term
Transcription
Definition
When enzymes make a RNA copy or a DNA strand
Term
Codon
Definition
a set of nitrogenous bases that make up a amino acid
Term
Translation
Definition
Changing information in mRNA into a order of amino acid into a protein
Term
Mutation
Definition
Any error or difference in a DNA sequence
Term
Point Mutation
Definition
A mutation in a DNA sequence that comes from a change in a single base pair
Term
Frameshift Mutation
Definition
A mutation that causes a shift in the DNA sequence when a single base is added or deleted
Term
Chromosomal Mutation
Definition
A mutation that comes to the chromosome level that changes the gene distribution to sex cells during meiosis
Term
Mutagen
Definition
Anything that can cause a change in DNA
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