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18 Cards in this Set

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adenine
a nitrogenous base found in both DNA and RNA; (A)
base
in molecular genetics, one of the nitrogen-containing single or double ringed structures that distinguish one nucleotide from another.
Chromosome
a single DNA double helix together with proteins that help to organize DNA
complementary base pair
bases tht pair by hydrogen bonding
cytosine
a nitrogenous base found in both DNA and RNA (C)
deoxyribonucleic acid
DNA- a molecule composed of deoxyribose nucleotides; contains the genetic information of all living cells
DNA helicase
an enzyme that helps unwind the DNA double helix during DNA replication
DNA ligase
an enzyme that joins the sugars and phosphates in a DNA strnad to create a coninuous sugar-phosphate backbone
DNA polymerase
an enzyme that bonds DNA nucleotides together into a continuous strand, using a pre-exisising DNA strand as a template
DNA replication
the copying of the double-stranded DNA molecule producing two identical DNA double helices
double helix
the shape of the two-stranded lengthwise into a corkscrew shape
free nucleotides
nucleotides that have not been joined together to form a DNA or RNA strand
Gene
a unit of heredity that encodes the information needed to specify the amino acid sequence of proteins and hence particular traits; a functional segment of DNA located at a particular place on a chromosome
guanine
a nitrogenous base found in both DNA and RNA (G)
nucleotide
a subunit of which nucleic acids are composed; a phosphate group bonded to a sugar which in turn bonded to a nitrogen-containing base
semiconservative replication
the process of replication of the DNA double helix the two DNA strands separate, and each is used as a tenplate for the synthesis of a complementary DNA strand
suarg-phosphate backbone
a major feature of DNA sturcture, formed by attaching the sugar of one nucleotide to the phosphate from the adjacent nucleotide in a DNA strand
thymine
a nitrogenous base found only in DNA (T)