Active Transport

Question 1

Active transport (protein mediated active transport)

Answer 1

Protein-mediated active transport
a type of active transport which
involves using membrane
proteins to move molecules
across a membrane against
their concentration gradient.
Also known as active transport

Question 2

When do cells need to use this type of transportation

Answer 2

When there is a higher concentration in the cell compared to the outside of the cell, the cell may also require more of the substance within the cell to function

Question 3

Why do substances that are polar (hydrophilic) and charged have to use this type of transportaion

Answer 3

Because they can’t use facilitated transportation due to travelling against tehri concentration gradient

Simple diffusion because they can’t go through the process of simple diffusion due to their charge

Question 4

How does active transport work

Answer 4

By using protein pumps and energy in order too transport ions against its concentration gradient

Question 5

Use the potassium and sodium ion pump to explain the process of active transport

Answer 5

Sodium moves out of the cell

Potassium moves into the cell to carry out metabolic reactions

Question 6

Steps of sodium-potassium pump

Answer 6

1. Binds to the sodium, which will be taken out of the cell
2. Sodium ions are not strongly bonded to the pump anymore due to this conformational change in which the shape opened to the extracellular space to release sodium
3. Two potassium bound to the pump and due to the energy already released their is the discharge of free-floating phosphate
4. As the pump changes shape again it releases the potassium back into the cell