The following statements were made regarding the patterning of anterior-posterior body plan of Drosophila:

A. Mutant Nanos mRNA that leads to the deletion of abdomen region

B. Nanos mutant phenotype expressed  two head phenotype

C. Nanos is a posterior morphogenic protein

D. It involves to represses the caudal mRNA

#Question id: 1082

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a type of signaling in which a cells respond to substrate that they themselves release ?

#Question id: 1083

#Unit 4. Cell Communication and Cell Signaling

 When a neuron responds to a particular neurotransmitter by opening gated ion channels, the neurotransmitter is serving as which part of the signal pathway?

#Question id: 1084

#Unit 4. Cell Communication and Cell Signaling

Which observation suggested to Sutherland the involvement of a second messenger in epinephrine's effect on liver cells?

#Question id: 1085

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements about a G protein signaling pathway is true?

#Question id: 1086

#Unit 4. Cell Communication and Cell Signaling

What is the most likely mechanism by which testosterone functions inside a cell?

#Question id: 1087

#Unit 4. Cell Communication and Cell Signaling

Scientists have found that extracellular matrix components may induce specific gene expression in embryonic tissues such as the liver and testes. For this to happen, there must be direct communication between the extracellular matrix and the developing cells. Which kind of transmembrane protein would most likely be involved in this kind of induction?