Cell Membrane Transport Quiz

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What type of protein is responsible for transporting specific molecules across the cell membrane by binding to them?

Peripheral protein

Carrier protein (correct)

Integral protein

Channel protein

Which component of the cell membrane helps maintain its fluidity?

Phospholipid

Peripheral protein

Cholesterol (correct)

Glycoprotein

Which process describes the movement of water across a selectively permeable membrane?

Facilitated diffusion

Simple diffusion

Osmosis (correct)

Active transport

What is the primary characteristic of integral proteins in the cell membrane?

They are embedded within the membrane. Signup and view all the answers

In passive transport across the membrane, what is the primary driving force for molecule movement?

Concentration gradient Signup and view all the answers

What best describes the primary distinction between diffusion and osmosis?

Osmosis refers specifically to the movement of solvent molecules. Signup and view all the answers

Which statement accurately reflects facilitated diffusion?

It allows specific molecules to pass through the cell membrane without energy input. Signup and view all the answers

During gas exchange in the alveoli, what direction do oxygen and carbon dioxide move?

Oxygen moves from air to blood, and carbon dioxide from blood to air. Signup and view all the answers

What physical principle underlies both diffusion and facilitated diffusion?

Movement of molecules occurs randomly due to concentration gradients. Signup and view all the answers

What factor does NOT influence the selection for transport in facilitated diffusion?

Solvent concentration. Signup and view all the answers

What is the primary driving force behind the process of diffusion?

Net passive movement from higher to lower concentration Signup and view all the answers

Why can diffusion occur in fluids but not in solids?

Solids have particles that cannot move around Signup and view all the answers

What happens when the barrier separating two different fluids is removed?

Particles from both fluids will mix until evenly distributed Signup and view all the answers

Which of the following best describes the nature of particles in a fluid that allows diffusion to occur?

Particles have spaces between them and can move about Signup and view all the answers

How does diffusion contribute to the uniformity of substances in a medium?

It leads to the random movement of particles until evenly mixed Signup and view all the answers

In which stage of diffusion are the particles completely mixed?

Stage 3 Signup and view all the answers

What is the outcome of diffusion when it reaches equilibrium?

Concentration of substances becomes uniform Signup and view all the answers

Which feature distinguishes diffusion from similar processes?

It occurs without any barriers to particle movement Signup and view all the answers

What differentiates active transport from passive transport?

Active transport requires external energy. Signup and view all the answers

Which mechanism directly utilizes ATP in the cell membrane?

Sodium/potassium pump Signup and view all the answers

In which cellular process are vesicles specifically involved?

Pinocytosis Signup and view all the answers

What is the primary role of the Golgi body in the processes described?

Packaging substances for exocytosis Signup and view all the answers

What is the result of the sodium/potassium pump's action?

Maintained electrochemical gradients across the membrane Signup and view all the answers

What is the value of water potential (Ψ) for pure water?

0 kilopascal (kPa) Signup and view all the answers

How do solutes affect the movement of water molecules in a solution?

They attract water molecules, reducing their ability to move freely. Signup and view all the answers

What relationship do solute concentration and water potential (Ψ) have?

Increased solute concentration leads to lower water potential. Signup and view all the answers

What is the effect of higher negative values of water potential?

They indicate a higher concentration of solute in the solution. Signup and view all the answers

What process is illustrated by the diagram showing water molecules surrounding a solute molecule?

The process of solute dissolving in a solvent. Signup and view all the answers

What is the correct water potential of pure water?

0 kPa Signup and view all the answers

What happens to a cell placed in a hypotonic solution?

It gains mass. Signup and view all the answers

Which of these describes why plant cells do not burst as a result of osmosis?

The cell wall provides structural support. Signup and view all the answers

Which statement is true regarding the flow of water between cells A, B, and C with given water potentials?

Water flows from A to C. Signup and view all the answers

Which solution is likely to have the lower water potential?

A 20% sugar solution. Signup and view all the answers

What occurs to red blood cells when they are placed in a 0.1 mol dm⁻³ solution of potassium chloride?

The cells shrink as water exits. Signup and view all the answers

Which of the following statements best describes the role of channel proteins in cell membranes?

They facilitate the passive movement of ions across the membrane. Signup and view all the answers

Which process would be characterized as requiring energy to transport substances across a cell membrane?

Active transport Signup and view all the answers

Which component of the cell membrane mainly functions in cell recognition?

Glycoproteins Signup and view all the answers

In the context of cell membrane transport, what is the primary difference between diffusion and facilitated diffusion?

Facilitated diffusion involves the use of transport proteins. Signup and view all the answers

What is the primary characteristic of a semi-permeable membrane?

It permits the passage of solvent molecules but not larger solute molecules. Signup and view all the answers

In a hypertonic solution, what occurs to a plant cell?

Water moves out of the cell causing it to shrink. Signup and view all the answers

What happens to animal cells when they are placed in a hypotonic solution?

They gain water and may burst. Signup and view all the answers

What describes a turgid plant cell?

It is full of water creating internal pressure against the cell wall. Signup and view all the answers

What is the correct description of the water movement in a hypertonic solution?

Water moves out of the cell. Signup and view all the answers

Which of the following statements about isotonic solutions is correct?

They maintain equal water potential with the surrounding cells. Signup and view all the answers

Which process describes the absorption of water by plant roots?

Osmosis Signup and view all the answers

During osmosis, water moves from which type of solution to another?

From a hypotonic solution to a hypertonic solution. Signup and view all the answers

In which situation would animal cells be least likely to maintain their integrity?

In a hypotonic solution. Signup and view all the answers

What happens to a plant cell when it becomes plasmolyzed?

The cytoplasm is pulled away from the cell wall, leaving gaps. Signup and view all the answers

What occurs during the re-absorption of water in the nephron?

Osmosis is utilized to move water back into the bloodstream. Signup and view all the answers

Which statement most accurately describes the process of osmosis?

It occurs through a selectively permeable membrane. Signup and view all the answers

When there is no net movement of water in and out of a cell, what type of solution is the cell likely in?

Isotonic Signup and view all the answers

What is the effect of a hypotonic solution on a plant cell?

The cell becomes turgid as water enters. Signup and view all the answers

What role does the selective permeable membrane play in osmosis?

It selectively permits water and certain solutes to cross. Signup and view all the answers

Which of these is NOT a major example of osmosis?

Facilitated diffusion of glucose. Signup and view all the answers

What occurs during facilitated diffusion?

Substances move down the concentration gradient without energy. Signup and view all the answers

Which of the following correctly describes active transport?

It utilizes ATP to move substances against their concentration gradient. Signup and view all the answers

What does the inverse relationship shown in the graph between potassium chloride concentration and lysed red blood cells indicate?

As potassium chloride concentration increases, fewer cells lyse. Signup and view all the answers

Why do most red blood cells burst in a 0.05 mol dm⁻³ potassium chloride solution?

Water moves into the cells due to a lower external solute concentration, causing swelling. Signup and view all the answers

Which statement about the properties of membranes during facilitated diffusion is false?

Facilitated diffusion requires the use of energy in all scenarios. Signup and view all the answers

Cell Membrane Transport Quiz

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Questions and Answers

What type of protein is responsible for transporting specific molecules across the cell membrane by binding to them?

Which component of the cell membrane helps maintain its fluidity?

Which process describes the movement of water across a selectively permeable membrane?

What is the primary characteristic of integral proteins in the cell membrane?

In passive transport across the membrane, what is the primary driving force for molecule movement?

What best describes the primary distinction between diffusion and osmosis?

Which statement accurately reflects facilitated diffusion?

During gas exchange in the alveoli, what direction do oxygen and carbon dioxide move?

What physical principle underlies both diffusion and facilitated diffusion?

What factor does NOT influence the selection for transport in facilitated diffusion?

What is the primary driving force behind the process of diffusion?

Why can diffusion occur in fluids but not in solids?

What happens when the barrier separating two different fluids is removed?

Which of the following best describes the nature of particles in a fluid that allows diffusion to occur?

How does diffusion contribute to the uniformity of substances in a medium?

In which stage of diffusion are the particles completely mixed?

What is the outcome of diffusion when it reaches equilibrium?

Which feature distinguishes diffusion from similar processes?

What differentiates active transport from passive transport?

Which mechanism directly utilizes ATP in the cell membrane?

In which cellular process are vesicles specifically involved?

What is the primary role of the Golgi body in the processes described?

What is the result of the sodium/potassium pump's action?

What is the value of water potential (Ψ) for pure water?

How do solutes affect the movement of water molecules in a solution?

What relationship do solute concentration and water potential (Ψ) have?

What is the effect of higher negative values of water potential?

What process is illustrated by the diagram showing water molecules surrounding a solute molecule?

What is the correct water potential of pure water?

What happens to a cell placed in a hypotonic solution?

Which of these describes why plant cells do not burst as a result of osmosis?

Which statement is true regarding the flow of water between cells A, B, and C with given water potentials?

Which solution is likely to have the lower water potential?

What occurs to red blood cells when they are placed in a 0.1 mol dm⁻³ solution of potassium chloride?

Which of the following statements best describes the role of channel proteins in cell membranes?

Which process would be characterized as requiring energy to transport substances across a cell membrane?

Which component of the cell membrane mainly functions in cell recognition?

In the context of cell membrane transport, what is the primary difference between diffusion and facilitated diffusion?

What is the primary characteristic of a semi-permeable membrane?

In a hypertonic solution, what occurs to a plant cell?

What happens to animal cells when they are placed in a hypotonic solution?

What describes a turgid plant cell?

What is the correct description of the water movement in a hypertonic solution?

Which of the following statements about isotonic solutions is correct?

Which process describes the absorption of water by plant roots?

During osmosis, water moves from which type of solution to another?

In which situation would animal cells be least likely to maintain their integrity?

What happens to a plant cell when it becomes plasmolyzed?

What occurs during the re-absorption of water in the nephron?

Which statement most accurately describes the process of osmosis?

When there is no net movement of water in and out of a cell, what type of solution is the cell likely in?

What is the effect of a hypotonic solution on a plant cell?

What role does the selective permeable membrane play in osmosis?

Which of these is NOT a major example of osmosis?

What occurs during facilitated diffusion?

Which of the following correctly describes active transport?

What does the inverse relationship shown in the graph between potassium chloride concentration and lysed red blood cells indicate?

Why do most red blood cells burst in a 0.05 mol dm⁻³ potassium chloride solution?

Which statement about the properties of membranes during facilitated diffusion is false?

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