What would happen to a living cell if it was unable to transcribe messenger RNA (mRNA)?
A. The cell would produce proteins that were folded improperly.
B. The cell would be unable to produce the proteins needed for life.
C. Nothing, the cell would still be able to function normally.
D. The cell would divide uncontrollably forming a tumor.

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.