Chapter 5: 5.4

Question 1

What is bulk transport?

Answer 1

Another form of active transport - when large molecules such as enzymes, hormones and whole cells like bacteria are to large to move through channel or carrier proteins, so they move into and out of cell

Question 2

What is the function of carrier proteins?

Answer 2

They span the membranes and act as a pump

Question 3

How does active transport work to move substances inside and outside a cell?

Answer 3

1. The molecule or ion to transported binds to receptors in the channel of the carrier protein on the outside of the cell
2. On the inside of the cell - ATP binds to the carrier protein to change shape. Opening up the inside cell.
3. Binding of the phosphate molecule to the carrier protein causes protein to change shape. m