Hello!
i’m taking pre-calculus & chemistry next semester and i tend to struggle with science & math courses so i already know i’ll need extra assistance. if anyone would like to “tutor” me or do assignment for me on either course, let me know. i will pay you (-: .

Molecules like glucose and amino acids are not lipid soluble, so cannot cross the cell membrane by simple diffusion. instead, they are shuttled across by carrier proteins in the membrane from high to low concentration. does this process require energy from the cell? this is an example of what type of molecular movement?