Question

multiple choice questions
question #1
what is the name of the special layer that makes up the cell membrane?
a. cell wall
b. phospholipid bilayer
c. sodium - potassium pump
d. atp
question #2
what is the process called when a cell takes in something from its surroundings?
a. active transport
b. exocytosis
c. endocytosis
d. diffusion
question #3
what is atp used for in the cell?
a. building cell walls
b. storing genetic information
c. providing energy for active transport
d. creating new cells
question #4
what macromolecule found in the cell membrane is involved in the sodium - potassium pump?
a. lipid
b. carbohydrate
c. protein
d. nucleic acid
question #5
what is the analogy used to describe how active transport works?
a. pushing a ball uphill
b. building a wall
c. sending a signal
d. opening a gate
question #6
what is the process called when a cell releases something from its inside?
a. active transport
b. endocytosis
c. exocytosis
d. diffusion

Explanation:

• Question #1: The cell membrane is made of a phospholipid bilayer. A cell wall is a structure outside the cell membrane in some cells. The sodium - potassium pump is a protein in the membrane, and ATP is an energy - carrying molecule.
• Question #2: Endocytosis is the process of a cell taking in substances from its surroundings. Active transport is the movement of substances against a concentration gradient using energy. Exocytosis is the release of substances from a cell. Diffusion is the passive movement of substances down a concentration gradient.
• Question #3: ATP is used for providing energy in the cell, especially for active transport. Building cell walls is not its main function. Storing genetic information is done by nucleic acids. Creating new cells involves many processes beyond just ATP.
• Question #4: The sodium - potassium pump is a protein. Lipids are mainly part of the phospholipid bilayer. Carbohydrates can be attached to lipids or proteins on the membrane surface. Nucleic acids are for storing genetic information.
• Question #5: Active transport moves substances against a concentration gradient, similar to pushing a ball uphill (against gravity). Building a wall, sending a signal, or opening a gate are not the typical analogies for active transport.
• Question #6: Exocytosis is the process of a cell releasing substances. Active transport is about movement across the membrane (in or out with energy). Endocytosis is taking in. Diffusion is passive movement.

Answer:

• Question #1: B. Phospholipid bilayer
• Question #2: C. Endocytosis
• Question #3: C. Providing energy for active transport
• Question #4: C. Protein
• Question #5: A. Pushing a ball uphill
• Question #6: C. Exocytosis