During the cell cycle,
a) dna is replicated once before mitosis and again before cytokinesis.
b) dna is replicated during mitosis.
c) dna is replicated before mitosis begins.
d) dna is replicated directly after the completion of mitosis.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

1) a

2)c

3)a

4)c

5)b

hope this , if so, your appreciation would be signified through giving   me brainliest, and a you : ) have any further questions? feel   free to ask me in the questions box.