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def: repeated nucleotide sequences that enable the ends of chromosomes to be replicated.

ALSO: Counteracts the tendency of the chromosome otherwise to shorten with each round of replication.

Telomerase (chapter 6)

def: an enzyme that uses RNA as a template to replenish the nucleotides that are lost each time a eucaryotic chromosome is duplicated by adding multiple copies of the same short DNA sequence to the end of chromosomes.

Template (chapter 6)

def: A molecular structure that serves as a pattern for the production of other molecules. Thus, a specific sequence of nucleotides in DNA can act as a template to direct the synthesis of a new strand of complementary DNA.

Transposon (chapter 6)

def: General term for short segments of DNA that can move from one location to another in the genome. Also known as the mobile genetic element.

Transport Vesicle (chapter 6)

def: Membrane vesicles that carry proteins from one intracellular compartment (i.e. from the ER to the Golgi)

Tyrosine Kinase (chapter 16)

def: Enzyme that phosphorylates specific proteins on tyrosines.

Tubulin (chapter 17)

def: Protein from which microtubules are made.

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