MCQs of Biology – Membrane Transport

Which of the following would be least likely to diffuse through a cell membrane without the helper a transport protein?

The rate of diffusion of a specific substance through a plasma membrane is affected by all of the following except:

Substance’X’ is the charged molecule of small molecular weight, It is found at higher concentrartion outside of cells than inside, How might substance’ X’ enter the cells?

The function of channel proteins in membrane is to:

In facilitated diffusion:

Diffusion of water through a selectively permeable membrane is called:

Osmosis is defined as:

Osmosis involves diffusion through a semipermeable membrane of:

Process of osmosis involves the movement of:

” Osmosis is the flow of solution from higher concentration to solution of lower concentration through semipermeable membrane” What is incorrect in this statement?

Which of the following experiment is called physiological demonstration of osmosis?

IN osmosis , water always moves toward the _______ solution, that is, toward _______ the solution with the ______ solute concentration .

RBCs undergo cremation when they are placed in:

A cell is equally permeable to sucrose solution and Na CI solution, First the cell is put in 0.6 M sucrose solution there is no change in size but when ut in 0.6 M NaCI solution the size will:

If a living plant cell is placed in a concentration sugar solution, the cell will:

If a plant cell is placed in a solution less concentration than that of the cell sap, water from outside will enter into the protoplasm through the process of:

A cell is placed in salt solution will:

O.P. of a solution is:

Which of the following is not cone rend with movement materials in and out of cells:

Plasma membrane help in:

In which of the following solution volume of a cell increases:

A cell swells up when kept in:

IN a plant cell, the shrinking of protoplasm is called:

Phenomenon of plasmolysis occurs when cells are kept in:

What does a cell show if placed in seawater ?

A plant cell is placed in a solution whose solute concentration is twice as great as the concentration of cytoplasm. The plasma membrane is selectively permeable allowing water but not solutes to pass through. What happen to the cell?

If a freshwater plant is put in seawater, its cell will:

If a marine alga is put in freshwater. its surrounding would be:

The concentration of solutes in a red blood cell is about 2% . Sucrose cannot pass through the membrane, but water and urea can. Osmosis would cause red blood cell s to shrink most when immersed in which of the following solutions?

The concentration of calcium in a cell is 0.3%. The concentration of calcium in the surrounding fluid is 0.1% . How could the cell obtain more calcium?

Movement of ions against concentration gradient is called:

Movement of ions or molecules in a direction opposite to that of prevailing electro- chamical gradient is known as:

Active transport in a cell occurs in:

Active transport :

Main difference between active and passive transport across cell membrane is that passive transport:

Which of the following requires ATP?

Which of the following is a difference between Active Transport (AT) and Facilitated Diffusion (FD)?

The biomembranes allow active transport of substances because:

The Na up +/K+ pump transports:

Na+ – K+ dependent ATPase activity helps in transport of:

Carrier molecules facilitating transport across cell membrane are:

Carrier proteins are involved in:

Enzyme that facilitates the transport through cell membrane is:

Membrane proteins are:

Which of the following enables a cell to pick up and concentrate a specific kind of molecule?

The term ‘phagocytosis’ has been coined by:

Phagocytosis may be characterized by which of the following statements?

The blood cell which shows phagocytosis is:

The process by which large molecules move out of the cell is called:

Which of the following phenomena is commonly referred as ‘cell drinking’?

Which of the following involves the nonselective uptake of tiny droplets of extracellular fluid?

Pinocytosis is:

A white blood cell is capable of producing and releasing thousands of antibody molecules every second. Antibodies are large, complex protein molecules. How would you expect them to leave the cell?

Which of the following statements is correct?

Macromolecules enter the plasma membrane of cells by:

Phagosomes and pinosomes collectively referred to as:

Size of molecules that can pass through plasma membrane is:

The water soluble materials pass through the proteins called: