2. Cell Transport

Which cell organelle is represented by number 7 in the picture?

• Nucleus

• Smooth ER

• Rough ER

• Golgi Apparatus

Which number represents the plasma membrane?

• 5

• 6

• 10

• 13

Which is a major difference between plant and animal cells?

• Plants cells DO NOT perform cellular respiration.

• Plant cells tend to have smaller vacuoles than animal cells.

• Plant cells have a cell wall in addition to a plasma membrane.

• Plant cells do not go through meiosis.

Which is NOT true about plasma membranes?

• The plasma membrane has proteins that assist in cellular transport.

• The plasma membrane is formed by phospholipids.

• The plasma membrane uses active transport to pump water out of the cell.

• The plasma membrane can be represented by the fluid mosaic model.

What is the name for the part of the plasma membrane represented by letter "j" in the picture?

• A glycolipid.

• A protein channel.

• A protein pump.

• An osmosis tunnel.

Which is true of both simple diffusion and osmosis?

• They are systems of passive transport in which substances move with the direction of the concentration gradient.

• They are systems of passive transport in which substances move against the concentration gradient.

• They are systems of active transport in which substances move with the direction of the concentration gradient.

• They are systems of active transport in which substances move against the concentration gradient.

How are pore proteins different than carrier proteins?

• Pore proteins assist in the transportation of larger molecules than carrier proteins.

• Pore proteins move substances through passive transport, but carrier proteins use energy to move substances.

• Pore proteins act as hydrophylic channels that open to allow movement of substances from high concentration to low concentration.

• Pore proteins change configuration to allow larger molecules to move from the outside of the cell to the inside.

Which of the following statements best describes active transport?

• Active transport is a process of moving substances against the concentration gradient with the use of ATP energy.

• Active transport is a process in which carrier proteins change shape to assist in the movement of large molecules in the same direction as the concentration gradient.

• Active transport occurs within the lungs where gases must be quickly exchanged for cellular respiration.

• All of the options describe the process of active transport.

Which is true of a sodium-potassium pump?

• The sodium-potassium pump moves three sodium ions out of the cell and two potassium ions into the cell.

• The sodium-potassium pump moves three sodium ions into the cell and two potassium ions out of the cell.

• The sodium-potassium pump moves both sodium and potassium ions into the cell.

• The sodium-potassium pump moves both sodium and potassium ions out of the cell.

This is a picture of a conentration gradient. In which direction will substances passively move across the membrane?

• From left to right.

• From right to left.

• The substances will not move without a pump.

• It's impossible to tell from this picture.