Membrane Transport Proteins Practice Questions

Question 1

How many transmembrane spanning domains does the Na+-K+-Cl- cotransporter contain?

Accepted Answer

12 transmembrane spanning domain

Answer

5 transmembrane spanning domain

Answer

7 transmembrane spanning domain

Answer

9 transmembrane spanning domain

Question 2

Assertion: RMP depends on proteins and phosphate ions.
Reason: Diffusion potential can be calculated using nernst equation.
Choose the best statement regarding the assertion and reason.

Accepted Answer

Both true, Reason is not the explanation of assertion

Answer

Assertion false, Reason true

Answer

Both true, Reason is the explanation of assertion

Answer

Assertion true, Reason false

Question 3

Diffusion of lipid-insoluble substances across the cell membrane depends on all of the following factors except which one?

Accepted Answer

Lipid solubility

Answer

Hydrated radius

Answer

Electrical charge

Answer

Shape

Question 4

Chloride receptor defect is responsible for:

Accepted Answer

Cystic fibrosis

Answer

Alpha-1 antitrypsin deficiency

Answer

Wilson's disease

Answer

Hemochromatosis

Question 5

Which of the following is the primary mechanism that drives sodium reabsorption in the proximal tubule?

Accepted Answer

Active sodium transport via the Na+-K+-ATPase pump at the basolateral membrane.

Answer

Sodium reabsorption through cotransport with amino acids at the luminal membrane.

Answer

Sodium reabsorption through cotransport with glucose at the luminal membrane.

Answer

Sodium reabsorption through countertransport with hydrogen ions at the luminal membrane.

Question 6

Which of the following is a potassium Channelopathy?

Accepted Answer

Episodic ataxia I

Answer

Hyperkalemic periodic paralysis

Answer

Long QT-syndrome

Answer

Hypokalemic periodic paralysis

Question 7

Which of the following ion plays a role in exocytosis?

Accepted Answer

Calcium

Answer

Potassium

Answer

Sodium

Answer

Magnesium

Question 8

Which of these is true about the highlighted transporter?

Accepted Answer

One molecule goes in, other molecule goes out

Answer

Both molecules go in

Answer

Both molecules go out

Answer

One molecule goes in and two exit

Question 9

Magnesium is not involved in ?

Accepted Answer

Hemoglobin synthesis

Answer

Cellular oxidation

Answer

Membrane transport

Answer

Glucose tolerance

Question 10

Following occurs in living cells only:

Accepted Answer

Active transport

Answer

Simple diffusion

Answer

Facilitated diffusion

Answer

Osmosis

Membrane Transport Proteins — MCQs

Membrane Transport Proteins — MCQs

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