cell communication

Question 1

hormone receptor complex

Answer 1

hormone binds to receptor in cytoplasm or nucleus and acts as transcription factor to regulate gene expression

Question 2

g protein receptors

Answer 2

inactive g protein is activated by receptor and then migrates to enzyme; enzyme is activated after GTP and starts signal cascade

Question 3

tyrosine kinase

Answer 3

membrane proteins that attach phosphates to tyrosines; signal cascade protein in changes shape after binding to phosphorylated tyrosine

Question 4

protein kinase

Answer 4

enzyme that transfers phosphate groups from ATP to a protein

Question 5

cytoplasmic protein kinase

Answer 5

phosphorylates either the amino acid serine or threonine

Question 6

cyclic AMP

Answer 6

usually the first step is the activation of protein kinase A

Question 7

inositol trisphosphate

Answer 7

IP3; involved in the release of calcium from the ER

Question 8

growth factor response

Answer 8

kinase signal transducation cascade promotes the activation of a transcription factor