Control of gene expression in prokaryotes part 3

Question 1

Identify the three symbols, top to bottom

Answer 1

1. AND/ BOTH
2. OR
3. NOT

Question 2

Define coherent feed forward loop

Answer 2

A turns on B, and both work together to turn on C

Question 3

Define incoherent feed forward loop

Answer 3

A goes turns on C, but also activates B, which inhibts C

Question 4

Define a flip-flop circuit

Answer 4

Two genes (through their products) repress each other.

Question 5

Define bi-stable switches

Answer 5

A flip flop circuit where triggers are present to repress both of the repressors at alternate times.

Question 6

Define the oscillator switch

Answer 6

A system of three repressors, each which is responsible for repressing one of the other repressors. Results in oscillation.