#1
Which cell transport mechanism requires energy input?
Passive transport
Facilitated diffusion
Active transport
Osmosis
#2
Which of the following is an example of passive transport?
Sodium-potassium pump
Endocytosis
Simple diffusion
Exocytosis
#3
Which organelle is primarily responsible for the production of ATP in eukaryotic cells?
Nucleus
Golgi apparatus
Mitochondria
Endoplasmic reticulum
#4
Which of the following is NOT a type of passive transport?
Simple diffusion
Facilitated diffusion
Endocytosis
Osmosis
#5
What is the primary function of the sodium-potassium pump?
To maintain the osmotic balance of the cell
To regulate the pH of the cytoplasm
To transport sodium ions into the cell and potassium ions out of the cell
To facilitate the diffusion of water molecules across the membrane
#6
What happens to a cell placed in a hypertonic solution?
It gains water and swells
It loses water and shrinks
There is no net movement of water
It bursts due to excessive water intake
#7
What is the function of channel proteins in cell transport?
They act as carriers for large molecules
They provide energy for active transport
They regulate the flow of ions and solutes across the membrane
They assist in endocytosis and exocytosis
#8
In active transport, the movement of molecules occurs:
Against the concentration gradient
Along the concentration gradient
Without any energy input
Through facilitated diffusion
#9
What is the role of carrier proteins in facilitated diffusion?
To provide energy for the movement of molecules
To transport molecules against the concentration gradient
To allow the movement of molecules without the use of energy
To regulate the flow of specific molecules across the membrane
#10
What is the difference between phagocytosis and pinocytosis?
Phagocytosis involves the engulfment of large particles, while pinocytosis involves the engulfment of liquids
Phagocytosis occurs only in plant cells, while pinocytosis occurs only in animal cells
Phagocytosis is a form of active transport, while pinocytosis is a form of passive transport
There is no difference between phagocytosis and pinocytosis
#11
Which of the following is an example of cotransport?
Sodium-potassium pump
Symport of glucose and sodium ions
Facilitated diffusion of water
Pinocytosis
#12
Which type of endocytosis involves the intake of specific molecules bound to receptors?
Phagocytosis
Pinocytosis
Receptor-mediated endocytosis
Exocytosis
#13
Which of the following statements about osmosis is correct?
It requires ATP to proceed
It involves the movement of water molecules from a region of lower solute concentration to a region of higher solute concentration
It is a type of active transport
It leads to the equalization of solute concentrations on both sides of the membrane
#14
Which of the following substances can freely diffuse across the cell membrane?
Water
Glucose
Sodium ions
Oxygen
#15
Which statement about the fluid mosaic model of the cell membrane is accurate?
It states that the cell membrane is composed solely of phospholipids and proteins
It describes the cell membrane as a rigid structure with no flexibility
It suggests that the cell membrane is a dynamic structure with proteins embedded in a fluid phospholipid bilayer
It proposes that the cell membrane is impermeable to all substances except water
#16
Which of the following statements about active transport is correct?
It always involves the movement of molecules down their concentration gradient
It requires ATP to drive the movement of molecules across the membrane
It is faster than passive transport processes
It relies solely on channel proteins for the movement of molecules
#17
Which of the following statements about endocytosis is true?
It always requires energy input
It involves the movement of molecules out of the cell
It occurs through the fusion of vesicles with the plasma membrane
It is a passive process