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What is the primary function of transport proteins in facilitated diffusion?
A) To change the shape of the cell
B) To provide energy
C) To help substances pass through the membrane
D) To store nutrients
C) To help substances pass through the membrane
Which of the following describes passive transport?
A) Requires energy to move substances
B) Moves substances against their concentration gradient
C) Moves substances along their concentration gradient without energy
D) Only occurs in plant cells
C) Moves substances along their concentration gradient without energy
What do we call molecules moving from an area of high concentration to an area of low concentration?
A) Active transport
B) Osmosis
C) Diffusion
D) Pinocytosis
C) Diffusion
Which of these substances can easily move through the cell membrane via simple diffusion?
A) Large proteins
B) Glucose
C) Oxygen
D) Ions
C) Oxygen
In osmosis, which direction does water move in relation to solute concentration?
A) From higher to lower solute concentration
B) From lower to higher solute concentrationB) From lower to higher solute concentration
C) It does not move
D) It moves randomly
B) From lower to higher solute concentrationB) From lower to higher solute concentration
Which of the following processes is an example of passive transport?
A) Active transport
B) Cell division
C) Protein synthesis
D) Osmosis
D) Osmosis
What happens to a cell in a hypertonic solution?
A) It swells
B) It shrinks
C) It remains the same
D) It divides
B) It shrinks
What is the main driving force behind diffusion?
A) Energy from ATP
B) Concentration gradient
C) Cell size
D) Temperature
B) Concentration gradient
What is endocytosis?
A) The process of expelling materials from a cell
B) The process of taking materials into a cell by engulfing them
C) The movement of molecules from high to low concentration
D) The diffusion of gases across a membrane
B) The process of taking materials into a cell by engulfing them
Which type of transport requires energy to move substances against their concentration gradient?
A) Passive transport
B) Facilitated diffusion
C) Active transport
D) Osmosis
C) Active transport
What is one of the main functions of the cell membrane?
A) To control what enters and exits the cell
B) To provide energy for the cell
C) To store genetic information
D) To produce proteins
A) To control what enters and exits the cell
What is osmosis?
A) The movement of solutes across a membrane
B) The movement of water across a semi-permeable membrane
C) The active transport of ions
D) The process of cell division
B) The movement of water across a semi-permeable membrane
What is facilitated diffusion primarily assisted by?
A) Energy from ATP
B) Transport proteins
C) Water molecules
D) Lipids
B) Transport proteins
During exocytosis, what type of substance is typically expelled from the cell?
A) Nutrients
B) Water
C) Waste products
D) Oxygen
C) Waste products
Which of the following describes a cell membrane that selectively allows certain substances to enter or exit?
A) Semi-permeable
B) Impermeable
C) Permeable
D) Fully permeable
A) Semi-permeable
What type of solution causes cells to gain water and swell?
A) Isotonic
B) Hypertonic
C) Hypotonic
D) Concentrated
C) Hypotonic
What role do phospholipids play in the cell membrane?
A) They provide energy
B) They form the barrier that separates the inside and outside of the cell
C) They act as enzymes
D) They store genetic information
B) They form the barrier that separates the inside and outside of the cell
. Which statement best describes facilitated diffusion?
A) It requires energy to move substances against their concentration gradient.
B) It involves the use of transport proteins to move substances across a membrane.
C) It is the movement of water only.
D) It occurs only in plant cells.
B) It involves the use of transport proteins to move substances across a membrane.
During which process does a cell engulf large particles or even other cells?
A) Exocytosis
B) Osmosis
C) Endocytosis
D) Passive transport
C) Endocytosis
What is diffusion?
A) The movement of water only
B) The process of moving substances from an area of low concentration to high concentration
C) The movement of particles from an area of high concentration to low concentration
D) The use of energy to move molecules
C) The movement of particles from an area of high concentration to low concentration
What role does the cell membrane play in cellular function?
A) It stores energy
B) It controls what enters and exits the cell
C) It produces proteins
D) It generates heat
B) It controls what enters and exits the cell
Which of the following is NOT a characteristic of passive transport?
A) Requires no energy
B) Moves substances from high to low concentration
C) Includes osmosis and diffusion
D) Moves substances against their concentration gradient
D) Moves substances against their concentration gradient
In facilitated diffusion, which type of molecules typically require assistance to cross the cell membrane?
A) Small nonpolar molecules
B) Large polar molecules
C) Gases
D) Water
B) Large polar molecules
Which of the following describes passive transport?
A) Requires energy to move substances
B) Moves substances against their concentration gradient
C) Moves substances along their concentration gradient without energy
D) Only occurs in plant cells
C) Moves substances along their concentration gradient without energy
Which of the following is true about passive transport?
A) It always requires energy
B) It is a slower process than active transport
C) It can occur through the lipid bilayer or protein channels
D) It can only happen in plant cells
C) It can occur through the lipid bilayer or protein channels