Question 20 (5 points) You would need secondary messenger molecules, such as cyclic AMP (CAMP) for cells to be able to have a response to which of the following? Nonsteroidal hormones Steroid hormones Statins Hemoglobin​

the backbone of the dna and rna compound is sugar phosphate.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.