Cell Biology

Why is the cell membrane semipermeable?

• To allow all substances to pass through freely.

• To prevent any substances from entering or leaving the cell.

• To selectively allow certain substances to pass through.

• Because it is made entirely of integral proteins.

What is the function of organelles within a cell?

• To perform specific functions necessary for cell survival.

• To store genetic information only.

• To provide energy for the entire organism.

• To make the cell membrane semipermeable.

What can be found in the plasma membrane of a cell?

• Only phospholipid bilayer.

• Only integral proteins.

• Only cytosol.

• Phospholipid bilayer and integral proteins.

Which of the following is a function of the cytoskeleton?

• It is the site of protein synthesis.

• It helps maintain the shape of the cell.

• It packages proteins for secretion.

• It produces energy for the cell.

What is the role of the Golgi apparatus in a cell?

• It is involved in lipid synthesis.

• It is the primary site of ATP production.

• It modifies, sorts, and packages proteins for secretion.

• It contains digestive enzymes for breaking down cellular waste.

What structure of the cell membrane makes it semipermeable?

• The presence of lipids

• The absence of proteins

• Structural rigidity

• Permeability to all substances

What is diffusion?

• The movement of substances through a membrane without expenditure of energy

• The active transport of ions through the membrane

• The synthesis of ATP

• Cell division

What happens in a hypertonic solution?

• Water leaves the cell

• Water enters the cell

• No change in water movement

• The cell divides

What is the difference between active transport and passive transport?

• Active transport does not require energy, while passive transport does

• Passive transport does not require energy, while active transport does

• Active transport uses channel proteins, while passive transport uses carrier proteins

• There is no difference, both are the same type of transport

What does cellular respiration produce from glucose?

• Proteins

• ATP

• DNA

• Fatty acids