Topic 8
Sequences that control gene transcription and are recognized by transcription regulators/factors.
What are cis-regulatory sequences?
Eve is regulated by this number of both activators and repressors.
What is 2?
What role does cholesterol play in the membrane's fluidity?
Regulates fluidity.
Permeability
This step in the regulation of gene expression avoids production of unnecessary intermediates.
What is the transcriptional control (rate-limiting) step?
The maintenance of cell identity through multiple rounds of division.
What is cell memory?
What is a typical feature of proteins that span the lipid bilayer?
Hydrophobic domains
The key difference between transporters and channels in membrane transport.
This structural motif consists of two alpha-helices that form a coiled coil.
What is a leucine zipper?
Genes subject to this are marked by methylation in early development.
What is imprinting?
What unique property makes lipids important for making biological membranes?
Amphipathic nature
What drives the transport of ions across membranes according to electrochemical gradient?
Ionic concentration and electrical charge differences.
The percentage of genes a typical cell expresses at any given time.
What is 30-60%?
These are non-coding RNAs longer than 200 base pairs.
What are IncRNAs?
Name a lab detergent used to solubilize membrane proteins.
Triton X-100.
Name a type of ATP-driven transporter.
P-type pumps.
This operon requires the absence of glucose and presence of lactose to be turned on.
These store inactive mRNAs for later re-activation.
What are P-bodies?
Mobility of molecules.
The trigger for ion channels to open in nerve cells.
Voltage changes OR ligands.