Gene Expression Flashcards
how is cell specialisation caused
different genes being expressed
whats a promoter
inhibits correct positioning of RNA polymerase
whats the RNA coding sequence
DNA sequence that’s transcribed into mRNA
whats a terminator/stop
terminates transcription of RNA
what way do ribosomes read RNA
5 -> 3
what way is DNA read
3 -> 5
name 3 transcription factors
repressors, cell signalling, intracellular molecules
EMC roles - 4
supports framework, provides an organised environment, regulates cell behaviour, connective tissues
how are intracellular molecules’ transcription factors
produced in a cell to be passed to neighbouring cells
whats the role of connective tissues
collagen and elastin support and provide a mechanical framework
what is the emc - long name
extracellular matrix
how does collagen work
creates fibrils by having a triple helix structure
role of EMC
wound healing - guides cells to correct place
stops cancer cells wandering around the cell
example of emc in plant cells
cell wall
how does cell wall provide strength
cellulose that creates microfibrils then into macrofibres
whats a gap junction made from
connexion tissues to make a connexon to form a channel
role of gap junction
allows small molecules to be transported between cells
can gap junctions allow for electrical impulses to be transferred between cells
Yes
how do gap junctions prevent damage
close or open to stop spread of toxins etc, such as PH spike
whats a gap junction
a protein complex which forms pores or channels
How are extracellular molecules associated with transcription factors
by binding to the cell surface membrane that’s directly trigger pathways to activate or regulate transcription factors
What’s an autosome
Any chromosome that’s not a sex chromosome
