Cell Biology Quiz

What do all cells naturally have in terms of charge?

• Positive charge

• Negative charge

• Neutral charge

• No charge

What causes ions to move through channels in a cell?

• Temperature difference

• Difference in concentration

• Light exposure

• Sound waves

What type of channels require a change in voltage to open?

• Chemical channels

• Voltage-gated channels

• Light-sensitive channels

• Temperature-sensitive channels

What is the role of the sodium-potassium pump in a cell?

• To generate light

• To transport oxygen

• To maintain concentration gradients

• To produce sound

Tags

NGSS.HS-LS1-3

What is membrane potential?

• A difference in charge between the inside and outside of a cell

• The ability of a cell to divide

• The energy required for a cell to function

• The process of cell respiration

Tags

NGSS.HS-LS1-3

What is the typical membrane potential of a cell?

• -70 mV

• 0 mV

• +70 mV

• -30 mV

Which ions contribute to the membrane potential?

• Na+ and K+

• Cl- and Ca2+

• H+ and OH-

• Mg2+ and Fe2+

Why are cells naturally negative on the inside?

• Because DNA is negative

• Due to the presence of proteins

• Because of the cell membrane

• Due to the presence of lipids

Diagram showing the distribution of ions across a cell membrane

• Sodium ions are more concentrated outside the cell

• Potassium ions are more concentrated outside the cell

• Chloride ions are more concentrated inside the cell

• Calcium ions are more concentrated inside the cell

Tags

NGSS.HS-LS1-3

What is a concentration gradient?

• A difference in temperature inside and outside a cell

• A difference in concentration of ions on the inside versus the outside of a cell

• A difference in pressure inside and outside a cell

• A difference in volume inside and outside a cell