STPM S1 Biology Quiz: Cell Membrane and Transport

What is the function of the cell membrane?

• Helps the cell maintain its shape and size

• Produces energy for the cell and releases waste products

• Stores genetic information and controls cell activities

• Regulates movement of substances and provides structural support

Tags

NGSS.MS-LS1-2

Explain the difference between active and passive transport across the cell membrane.

• Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances down their concentration gradient.

• Active transport moves substances down their concentration gradient, while passive transport moves substances against their concentration gradient.

• Active transport does not require energy, while passive transport requires energy to move substances.

• Active transport and passive transport both require energy to move substances across the cell membrane.

Describe the structure of the cell membrane and its components.

• Protein bilayer with embedded phospholipids and cholesterol

• Cholesterol bilayer with embedded proteins and phospholipids

• Phospholipid monolayer with embedded proteins and cholesterol

• Phospholipid bilayer with embedded proteins and cholesterol

What is the role of transport proteins in the cell membrane?

• Store energy in the cell membrane

• Facilitate the movement of molecules across the cell membrane

• Regulate the temperature of the cell membrane

• Prevent the movement of molecules across the cell membrane

Discuss the process of osmosis and its significance in cell biology.

• Osmosis is the movement of salt molecules across a semi-permeable membrane from an area of high salt concentration to an area of low salt concentration. It is significant in cell biology as it helps in maintaining the balance of sodium and potassium inside the cell.

• Osmosis is the movement of air molecules across a semi-permeable membrane from an area of low air concentration to an area of high air concentration. It is significant in cell biology as it helps in maintaining the balance of oxygen and carbon dioxide inside the cell.

• Osmosis is the movement of glucose molecules across a semi-permeable membrane from an area of low glucose concentration to an area of high glucose concentration. It is significant in cell biology as it helps in maintaining the balance of energy inside the cell.

• Osmosis is the movement of water molecules across a semi-permeable membrane from an area of high water concentration to an area of low water concentration. It is significant in cell biology as it helps in maintaining the balance of water and solutes inside the cell.

Tags

NGSS.HS-LS1-3

Explain the concept of diffusion and its role in cellular transport.

• Diffusion is the movement of particles from an area of low concentration to an area of low concentration. It plays a crucial role in cellular transport by allowing substances to move in and out of the cell with the need for energy.

• Diffusion is the movement of particles from an area of high concentration to an area of low concentration. It plays a crucial role in cellular transport by allowing substances to move in and out of the cell without the need for energy.

• Diffusion is the movement of particles from an area of low concentration to an area of high concentration. It plays a crucial role in cellular transport by allowing substances to move in and out of the cell without the need for energy.

• Diffusion is the movement of particles from an area of high concentration to an area of high concentration. It plays a crucial role in cellular transport by preventing substances from moving in and out of the cell without the need for energy.

What are the different types of passive transport mechanisms in cells?

• Active transport, Endocytosis, Exocytosis

• Diffusion, Osmosis, Facilitated diffusion

• Isotonic transport, Hypotonic transport, Hypertonic transport

• Pinocytosis, Phagocytosis, Hypertonic transport

Discuss the importance of maintaining membrane potential in cells.

• Maintaining membrane potential is only important for aesthetic purposes

• It has no significant impact on cellular functions

• It is important for various cellular functions such as signaling, transport of molecules, and maintaining cell volume.

• Membrane potential only affects the color of the cell

Tags

NGSS.HS-LS1-3

Explain the process of endocytosis and its significance in cellular function.

• Endocytosis is only significant in cellular function for removing waste and has no other impact on the cell.

• Endocytosis is not significant in cellular function and has no impact on the cell's ability to take in nutrients or regulate signaling molecules.

• Endocytosis is significant in cellular function as it allows the cell to expel nutrients and signaling molecules, rather than taking them in.

• Endocytosis is significant in cellular function as it allows the cell to take in nutrients, regulate signaling molecules, and control the number of specific receptors on the cell surface.

Compare and contrast the processes of facilitated diffusion and active transport.

• Facilitated diffusion involves the use of transport proteins, while active transport does not.

• Facilitated diffusion is passive, while active transport is active.

• Facilitated diffusion requires energy, while active transport does not.

• Facilitated diffusion moves molecules against the concentration gradient, while active transport moves molecules with the concentration gradient.