Role of membrane proteins Prerna
is drinking a fruit juice which has vitamins, electrolytes, and sugar. The
sugar is broken down in our gastro-intestinal (GI) tract into glucose, and this
glucose must be transported inside our cells to make energy. Also, the
whole action which enables Prerna to perceive the thirst and drink the juice is
governed by electrical potentials across neurons, which are dependent on the
transport of sodium and potassium ions. Considering the selective permeability
of our cell membrane and by looking at the figures, which of the following
options are true:

(Hint:
For answering regarding the sodium and potassium ions, look at the bottom
figure and the concentration plots)

Question

Role of membrane proteins Prerna
is drinking a fruit juice which has vitamins, electrolytes, and sugar. The
sugar is broken down in our gastro-intestinal (GI) tract into glucose, and this
glucose must be transported inside our cells to make energy.  Also, the
whole action which enables Prerna to perceive the thirst and drink the juice is
governed by electrical potentials across neurons, which are dependent on the
transport of sodium and potassium ions. Considering the selective permeability
of our cell membrane and by looking at the figures, which of the following
options are true:

(Hint:
For answering regarding the sodium and potassium ions, look at the bottom
figure and the concentration plots)

Answer

Glucose
cannot freely diffuse into our plasma membrane and the figure shows it using a
carrier protein to move using facilitated diffusion

Answer

Glucose can freely diffuse into our plasma
membrane and does not need any transport proteins

Answer

Sodium and potassium are transported along
their concentration gradient, and the  orange hexagon in the figure
depicts the sodium ion and the yellow ellipse denotes potassium

Answer

Sodium
and potassium are transported against their concentration gradient, and the 
orange hexagon in the figure depicts the sodium ion and the yellow ellipse
denotes potassium.

Answer

Sodium and potassium are transport by
facilitated diffusion, and the orange hexagon in the figure depicts the sodium
ion and the yellow ellipse denotes potassium

Answer

Glucose cannot freely diffuse into our plasma
membrane and the figure shows it using a pump to transport against a
concentration gradient

Answer

Sodium and potassium are transported against
their concentration gradient, and the  orange hexagon in the figure
depicts the potassium ion and the yellow ellipse denotes sodium.

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