The answer would be the second option. The best reason for doing more background research after making an observation and before forming a hypothesis is to prevent making the same mistakes made in a prior experiment. It is to make sure that you are able to see the problems of a research and make an experimental design that will minimize the errors.
Facilitated diffusion.
A protein channel is used to allow larger or charged molecules to enter/leave the cell.
Answer:
The type of amino acids I would expect to see in the DNA binding regions of such proteins are AMINO ACIDS THAT ARE POSITIVELY CHARGED AT pH 7.
Explanation:
