Worksheets1.4: Membrane Transport (IB Biology)
Total questions: 15
Worksheet time: 8mins
The diagram shows a section through a membrane. What are the modes of transport in the diagram?
A
B
C
D
Which graph best represents the relationship between the concentration of chloride ions in the external environment of a cell and the rate at which the chloride ions move by facilitated diffusion into the cytoplasm of the cell?
A
B
C
D
The diagrams represent cells with the same concentration of dissolved substances in their cytoplasm. If all the cells were placed in the same hypertonic sucrose solution, which cell would show the greatest rate of change in the concentration of its cytoplasm?
A
B
C
D
A human organ is being prepared for transplant. In what type of solution must it be bathed?
A. A hypertonic solution
B. A hypotonic solution
C. Pure water containing no solutes
D. A solution with the same osmolarity as the organ tissue
Dialysis membrane was set up to model digestion and absorption in the small intestine.
What is a limitation of this model?
A. There can be no active transport.
B. Maltose will pass through the membrane.
C. Lipase should be present with protein.
D. The membrane is not permeable to starch.
The salt concentration inside an animal cell is 1.8 %. The salt concentration in the surrounding medium becomes 5 %. What will be the likely response?
A. The cell will gain water from the medium.
B. The cell will lose salt to the medium.
C. The cell will remain unchanged.
D. The cell will shrink from loss of water.
What is osmosis?
A. The movement of water through a membrane from a low to a high solute concentration
B. The movement of solutes through a membrane from a high to a low water concentration
C. The movement of water through a membrane from a high to a low solute concentration
D. The movement of solutes through a membrane from a low to a high water concentration
Which movement occurs by osmosis?
A. Oxygen from alveoli into the blood
B. Water from a leaf into the atmosphere
C. Water from soil to root
D. Nitrate ions from soil to root
What do diffusion and osmosis have in common?
A. They only happen in living cells.
B. They require transport proteins in the membrane.
C. They are passive transport mechanisms.
D. Net movement of substances is against the concentration gradient
What is the difference between simple diffusion and facilitated diffusion?
A.
B.
C.
D.
What route is used to export proteins from the cell?
A. Golgi apparatus → rough endoplasmic reticulum → plasma membrane
B. Rough endoplasmic reticulum → Golgi apparatus → plasma membrane
C. Golgi apparatus → lysosome → rough endoplasmic reticulum
D. Rough endoplasmic reticulum → lysosome → Golgi apparatus
Cells in the adrenal gland produce the hormone epinephrine and store it in vesicles. To release epinephrine these vesicles are carried to the plasma membrane and fuse with it. What process is occurring?
A. Expulsion
B. Exchange
C. Excretion
D. Exocytosis
Why do crop plants dry out when a field is irrigated with water contaminated by sea water?
A. The plants lose water by active transport.
B. The plants gain salt by osmosis.
C. The plants gain salt by diffusion.
D. The plants lose water by osmosis.
Which process requires channel proteins?
A. Simple diffusion
B. Facilitated diffusion
C. Binding of hormones
D. Exocytosis
What feature of cell membranes allows endocytosis to occur?
A. Fluidity of phospholipid bilayer
B. Presence of protein pumps
C. Presence of carrier proteins
D. Glycoprotein binding sites
