General Biology I - Summative Test

Which transport mechanism is defined as the movement of molecules from an area of higher concentration to an area of lower concentration?

• Active transport

• Diffusion

• Osmosis

• Pinocytosis

Which of the following bulk transport mechanisms DOES NOT transport materials towards the cell?

• Exocytosis

• Phagocytosis

• Pinocytosis

• Receptor-mediated endocytosis

Which of the following passive transport mechanism requires a carrier protein?

• Diffusion

• Facilitated Diffusion

• Osmosis

• Both A and C

Which process enables large molecules like fats and proteins to enter a cell?

• Active transport

• Diffusion

• Osmosis

• Pinocytosis

What happens to the cell if it is placed in a hypertonic solution?

• The cell swells.

• The cell shrinks.

• The cell tends to absorb more water.

• The medium does not affect the cell at all.

A U-tube is divided into halves by a semi-permeable membrane. Side A contains sugar solution and side B contains an equal amount of pure water. In which direction will more water molecules move per unit of time?

• From A to B

• From B to A

• From A to B then B to A

• No movement of water will take place

What process takes place in the setup in item number 6?

• Diffusion

• Phagocytosis

• Plasmolysis

• Osmosis

In the lungs, the movement of carbon dioxide out of cells and oxygen into cells can be best explained by which of the following processes?

• Active transport

• Diffusion

• Endocytosis

• Osmosis

What is the requirement for the passage of materials into and out of cells in active transport?

• Carrier and cellular energy

• Carrier only

• Concentration gradient only

• Vacuole formation

A biochemist is studying the transport of substance X into cells. She finds out that the transport is affected by a chemical that inhibits energy production. Substance X is possibly transported into cell by what process?

• Active transport

• Diffusion

• Facilitated diffusion

• Osmosis