What is the role of the nuclear localization sequence in a nuclear protein? select one: a. it is bound by cytoplasmic proteins that direct the nuclear protein to the nuclear pore. b. it is a hydrophobic sequence that enables the protein to enter the nuclear membranes. c. it aids in protein unfolding so that the protein can thread through nuclear pores. d. it prevents the protein from diffusing out of the nucleus through nuclear pores?

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food