Question

I got a 3/5 on a quiz about the membrane or membranes and transport, but they never told me which one's i had wrong and why? Help me out please? these were the questions and my answers and my knowledge on why i answered the way i did.

What molecule gets attached to the sodium-potassium pump that leads to a conformational change?

a. GTP

b. Phospholipid

c. ATP - I said ATP because I know that the pump requires ATP to do active transport.

D. Integrin

Which of these types of cellular transport requires energy to function?

A.) Bulk Transportation (I said Bulk Trans. because I know it is a type of Active transportation and Active transportation requires energy.)

B.) Diffusion

C.) Facilitated Diffusion

D.) Osmosis

If the animal cell is placed in a solution of 25% sugar, what happens to this cell?

A.) The cell will lose sugar to the surrounding solution

B.) The cell will lose water and shrivel up (I said B, because it's not telling me how much concentration the cell has so im assuming there's less water outside due to 25% sugar so it would move out of the cell and the cell will shrivel up to reach equilibrium.

C.) The cell will not gain or lose any water because it's already at equilibrium

D.) The cell will gain water and burst

How many sodium and potassium are pumped in/out of the cell and in what direction?

A.) 2 potassium out: 2 sodium in

B.) 2 sodium out: 2 potassium in

C.) 2 potassium out: 3 sodium in ( I was watching a video about the pump and im 65% positive it was 2K+ (potassium) going out of the cell, and 3Na+ (sodium) going inside the cell)

D.) 3 sodium out: 2 potassium in

What type of solution, typically, is best for a plant cell to survive and thrive in?

A.) hypertonic

B.) isotonic ( I said isotonic because cells want to reach equilibrium so im assuming thats how they thrive)

C.) hypotonic

Answer 1

3rd question s answered wrong, Option D is correct.

Q) If the animal cell is placed in a solution of 25% sugar, what happens to this cell?

A) 25% sugar solution is hypotonic to the cytoplasm in the animal cell, therefore water will move inside the cell due to osmotic pressure and cells will gain water and burst.

4th question is answered wrong, Option D is the correct answer.

Q)How many sodium and potassium are pumped in/out of the cell and in what direction?

A) The sodium-potassium pump is found in our cellular membranes, where it is in charge of generating a gradient of ions. It continually pumps sodium ions out of the cell and potassium ions into the cell, powered by ATP. For each ATP that is broken down, it moves 3 sodium ions out and 2 potassium ions in. As the cell is depleted of sodium, this creates an electrical gradient and a concentration gradient, both of which are put to use for many tasks.