A Cell Is Placed into a 1 Millimolar Solution of Substance

question 20

Multiple Choice

A cell is placed into a 1 millimolar solution of substance X and over time you witness the concentration of X inside the cell increase to 5 millimolar.The best explanation for this is:

• A)X is moving into the cell by simple diffusion
• B)X is moving into the cell by diffusion through a protein channel
• C)X is moving into the cell by facilitated diffusion
• D)X is moving into the cell by primary active transport
• E)It is not possible to tell which mechanism is responsible for the transport of X

---

Definitions:

Asset Revaluation Surplus

The increase in value of an asset, reflected on a company's financial statements, after it has been revalued to its current market value.

General Reserve

Funds set aside by a company from its profits for general unspecified future risks or obligations.

Amortisation of Goodwill

The gradual write-off of the purchased goodwill of a company over time, reflected as a non-cash expense in the income statement.

Associate's Profit

The portion of profits attributable to a company's investment in an associate, typically accounted for using the equity method.