Midterm Review Part 2

As a result of diffusion, the concentration of substances:

• Always remains greater inside a membrane

• Eventually reaches equilibrium because it is balanced on both sides of a membrane

• Always remains greater on the outside of a membrane

• Always moves from inside the cell to the environment

Diffusion takes place:

• Only through a cell wall

• From an area of low concentration to an area of high concentration

• From an area of high concentration to an area of low concentration

• Inside a mitochondria

The dispersal of food coloring in a beaker of water is an example of:

• Diffusion

• Osmosis

• Endocytosis

• Exocytosis

Molecules too large to be moved across a cell membrane can be removed from the cell by:

• Diffusion

• Exocytosis

• Osmosis

• Contractibility

Molecules that are too large to move through the membrane can be transported into the cell by:

• Osmosis

• Endocytosis

• Exocytosis

• Diffusion

The process by which water passes into or out of a cell is called:

• Solubility

• Osmosis

• Active transport

• Exocytosis

The fatty acid tails of the phospholipid molecules in a cell membrane are ____.

• Heterotrophic

• Hydrophobic

• Hydrophilic

• Homotrophic

How many layers of phospholipid molecules are there in a cell membrane?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS1-2

In active transport ____.

• The cell uses energy to move particles from low to high concentrations

• The cell uses energy to move particles from high to low concentrations

• The cell does not use energy

• The cell stops substances from moving into the cell

Tags

NGSS.HS-LS1-3

How does carbon’s ability to form four bonds makes it suited to form macromolecules?

• It forms short, simple carbon chains

• It forms large, complex, diverse molecules

• It forms covalent bonds with other carbon atoms

• It forms covalent bonds that can exist in a single plane

Tags

NGSS.HS-LS1-6