Cell Signalling and Transduction
Two key organizing principles for large multicellular organisms are

prokaryotic cell structure and cell specialization
simple nerve reflexes and cell specialization
cell specialization and communication between cells
communication between cells and simple nerve reflexes

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
Which of the following is true about a hydrophilic signaling molecule?

It is a steroid
Since it can enter the cell, it directly affects some specific cell process
It might trigger a signal cascade that causes some effect in a cell
Its receptor is located in the cytosol of the target cell

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?

They alter the chemical structure of key signaling molecules
They destroy the receptors for key signaling molecules
They block the normal functioning of signal transduction mechanisms
They prevent the production of key signaling molecules

ANSWER DOWNLOAD EXAMIANS APP