what are telomeres
zones of repetaitve non coding sequences at the end of chromosomes
why do we have telomeres
- critical info lost during replication
- final rna primer put down on lagging strand not replaced with dna nucleotides
why are telomeres beneficial
-prevent loss of critical info
-prevent chromosomes from fusing to other chromosmes
-prevent damage from other enzymes
-play role in determining how many times a cell can divide therefore play a role in determining lifespan of san organism
why do qwe need to control gene expression
pr synthesis is an energy consuming process, needs to be regulated.—> Living things need to repsond to environment. of time, energy and resources for the cell. can cause disease if not regulated.
mrna strand mist be modified before leaving nucleus
poly a tail, add 5’cap, removal of introns
what is in translation
mrna, trna, ribosomes
how does dna replicate
semiconservative manner
process of dna replication
enzymes involved in building of dna replication
challenge w dna replication
