What takes place during transcription?

a) proteins are made from rna .
b) dna is made from rna .
c) dna is made from dna .
d) rna is made from dna .

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?

For which of the following ions is the intracellular concentration typically higher than the extracellular concentration? a. sodium b. calcium c. magnesium d. potassium e. chloride