Explain the central dogma and why
a two-step process is necessary in
order to make proteins

answer; hypnagogic sensations)

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .

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.