One reason why rna molecules are the leading candidate as the first informational molecule is that rna molecules are usually double stranded. rna nucleotides are a major component of cell membranes. rna serves as the hereditary material in today's prokaryotic cells. some rna molecules can function as enzymes.

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

If your blood becomes too concentrated with iona, what will happen to the red blood cells