What cell structure that is made of dna that gives the master instructions for the cell

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Which of these statements are true about scientific theories and hypothesis