SI #14

What happens to an animal cell placed in a hypotonic solution?

• A. It shrinks

• B. It remains the same size

• C. It swells or may burst

• D. It divides

An isotonic solution means that:

• A. The solute concentration inside the cell is higher than outside

• B. The solute concentration inside the cell is lower than outside

• C. The solute concentration is the same inside and outside the cell

• D. None of the above

A hypertonic solution will cause an animal cell to:

• A. Shrink

• B. Swell

• C. Divide

• D. Remain the same size

Which of the following does not require a protein to facilitate the movement of molecules across a membrane?

• A. Simple diffusion

• B. Facilitated diffusion

• C. Osmosis

• D. Active transport

How does facilitated diffusion differ from simple diffusion?

• A. It requires energy

• B. It moves molecules from a low to high concentration

• C. It uses protein channels or carriers

• D. It does not allow molecules to move across a membrane

Which of the following requires energy to transport molecules?

• A. Passive transport

• B. Active transport

• C. Simple diffusion

• D. Facilitated diffusion

Co-transport allows a molecule to move against its concentration gradient by:

• A. Using energy from ATP

• B. Moving simultaneously with another molecule

• C. Using protein channels

• D. Using protein carriers

In competitive inhibition of enzyme activities:

• A. The inhibitor binds to the active site of the enzyme

• B. The inhibitor binds to a site other than the active site

• C. The inhibitor permanently deactivates the enzyme

• D. The inhibitor increases the enzyme's activity

Which type of inhibition can be overcome by increasing the substrate concentration?

• A. Non-competitive inhibition

• B. Competitive inhibition

• C. Both

• D. Neither

The specific region of an enzyme to which a substrate binds is called the:

• A. Allosteric site

• B. Active site

• C. Competitive site

• D. Passive site