LEARNING CATALYTICS
What would you measure to determine if the lac operon is active?
Levels of beta galactosidase and permease
MPF
Mitosis promoting factor
Activates all the proteins required for S phase for DNA replication.
Caused by cyclin binding in cdk and removing the phosphate group, activating it.
Cell signaling
1. reception of a signaling molecule
2. transduction of the signal
3. response to the signal
translation - initiation
mRNA binds to small subunit.
tRNA binds to AUG codon.
Large subunit binds to complete assembly.
In chromatin structure, each nucleosome is:
a DNA double helix wrapped twice around a package of histone proteins.
When lactose is absent, what is bound to the lac operon?
A repressor binds to DNA and transcription is blocked. Binds to the regulatory sequence of DNA (operator)
The ________ is/are arranged sequentially after the promoter.
genes of an operon
Translation
Informational transfer from mRNA to protein.
Also called protein synthesis.
Autocrine signaling
signals act on the cells that synthesized the signal
Ex. Growth factors
Tumor Suppressors
Look for DNA damage and stop the cell cycle if it is present.
