cell signalling lecture - week 2

Question 1

What are the key components of a signalling mechanism?

Answer 1

• transmitter
• channel
• receiver

Question 2

What is needed for signalling mechanisms?

Answer 2

• reliability
• animal distortion
• amplification
• regulation fo cross-talk

Question 3

How can you generate a mosaic pattern?

Answer 3

• lateral inhibition
• delta notch protein
• differentiating between primary and secondary

Question 4

How do you split the head from the tail?

Answer 4

• drosophelia melanogaster (fruit fly)
• bided mRNA is physically tethered to the anterior
• nanos mRNA is tethered to posterior
• mRNAs translated to protein
  proteins form gradients
• gradients give anterior posterior identity