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DNA Key Terms
Key terms for DNA Biology 11
38
Biology
11th Grade
02/23/2010

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Term
DNA (deoxyribonucleic acid)
Definition
A double-stranded nucleic acid that has the genetic information for cell growth, division, and function
Term
Base pairing
Definition
The specific hydrogen bonding between purines and pyrimidines in double stranded nucleic acids
Term
RNA (ribonucleic acid)
Definition
a nucleic acid that is generally single stranded and plays a role in moving information from DNA to protein-forming system of the cell
Term
Future Generations
Definition
N/A
Term
Double stranded chain of nucleotides
Definition
N/A
Term
Single chain of nucleotides
Definition
N/A
Term
tRNA (transfer ribonucleic acid)
Definition
Short-chain RNA molecules present in the cell that pairs the correct amino acids to the protein chain that is being synthesized at the ribosome of the cell
Term
rRNA (ribonucleic acid)
Definition
A nucleic acid found in all living cells it plays a role in moving information from DNA to the protein-forming system of the cell
Term
Transcription
Definition
It is the process of making a copy of genetic information gathered in a DNA strand into a complementary strand of RNA with the help of RNA polymerases
Term
Complimentary strands
Definition
Two single strands of dna in which the nucleotide sequence is such that they will attach as a result of base pairing throughout the full length
Term
Codons
Definition
A set of three adjacent nucleotides also called triplet in mRNA that base-pair with the opposite aniticodon of tRNA molecule that holds a particular amino acid specifying the type and sequence of amino acids for protein synthesis
Term
64 Possible combinations
Definition
N/A
Term
20 Amino acids
Definition
N/A
Term
Amino acid sequence
Definition
The sequence of amino acids formed in chains within the protein molecule. this is referred to as the primary structure of proteins it is a fundamental importance in determining protein conformation
Term
Amino acid
Definition
The building block of protein in which each is coded for by a codon and attached together through peptide bonds
Term
Translation
Definition
A step in protein biosynthesis where the genetic code carried by mRNA is decoded to make the specific sequence of amino acids in a polypeptide chain
Term
Polypeptide chain
Definition
A chain of amino acids joined together through peptide bonds
Term
Peptide bond
Definition
The link between the carboxyl group of one amino acid and the amino group of another
Term
Nucleotides
Definition
The basic building block of nucleic acids such as DNA and RNA it is an organic compound made up of nitrogenous base, a sugar, and a phosphate group
Term
Sugar
Definition
Any monosaccharide or disaccharide, used especially by organisms to store energy
Term
Phosphate
Definition
Molecules that consist of phosphorous and oxygen. Phosphate molecules are an important component of nucleic acids such as DNA
Term
Nitrogenous base
Definition
A nitrogen-containing molecule having the chemical properties of a base
Term
Adenine
Definition
One of the bases that form part of a nucleotide, the structures that are present in dna chains and pairs with Thymine
Term
Guanine
Definition
One of the four bases, one of the constituent bases of nucleic acids, nucleosides and nucleotides and pairs with Cytosine
Term
Cytosine
Definition
One of the four nitrogenous bases and pairs with Guanine
Term
Thymine
Definition
One of the four nitrogenous bases and pairs with Adenine
Term
Purines
Definition
A series of heterocyclic compounds that are variously replaced in nature and are known also as purine bases
Term
Pyrimidines
Definition
A family of six-membered heterocyclic compounds appearing in nature in a wide variety of forms
Term
Double helix
Definition
A conformation or shape describing a structure that typically has two matching helices intertwined about a common axis, such as the structure of the DNA molecule
Term
Replication
Definition
The process of duplicating or reproducing, as the replication of a copy of a polynucleotide strand of DNA or RNA
Term
Enzyme
Definition
A catalyst or a chemical produced by cells to speed up specific chemical reaction
Term
Ribosome
Definition
A minute particle made up of protein and ribonucleic acid that serves as the site of protein synthesis
Term
Ribose
Definition
A sugar monomer in RNA also found in other metabolically important compounds
Term
Ribose
Definition
A sugar monomer in RNA also found in other metabolically important compounds
Term
Uracil
Definition
The pyrimidine base from which uridine is derived
Term
Start Codon
Definition
A codon that tells to start reading the DNA
Term
Stop Codon
Definition
A codon that tells to stop reading the DNA
Term
Hydrogen bond
Definition
A bond that consists of hydrogen to bond bases and etc
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