Which of the following is NOT characteristic of the glycocalyx found in bacteria?

a. a viscous coating surrounding the cell made of polysaccharide, polypeptide, or both
b. creates a slimy, slippery coating that prevents bacteria from attaching to surfaces
c. if firmly attached, contributes to bacterial virulence
d. a structure that can be visualized using an acidic negative stain and a basic counterstain

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.