Question

1. which type of transport requires energy (atp)?

a. osmosis
b facilitated diffusion
c. active transport
d. simple diffusion

1. when a cell takes in large molecules by forming vesicles, this process is called

a. exocytosis
b. endocytosis
c. osmosis
d. passive transport

1. what is the movement of water through a membrane called?

a. diffusion
b. osmosis
c. exocytosis
d. active transport

1. facilitated diffusion requires:

a. energy
b no energy but a helper protein
c. only large molecules
d. atp and vesicles

Explanation:

• Question 7:
• Osmosis is the movement of water across a semi - permeable membrane from an area of high water concentration to an area of low water concentration. It is a passive process and does not require ATP.
• Facilitated diffusion is the movement of molecules (such as glucose) across a membrane with the help of transport proteins. It is also a passive process and does not require ATP.
• Active transport is the movement of molecules against their concentration gradient (from low to high concentration). This process requires energy in the form of ATP.
• Simple diffusion is the movement of small, non - polar molecules (like oxygen) across a membrane from an area of high concentration to an area of low concentration. It is a passive process and does not require ATP.
• Question 8:
• Exocytosis is the process by which a cell releases large molecules (such as proteins) by fusing vesicles with the plasma membrane.
• Endocytosis is the process by which a cell takes in large molecules by forming vesicles.
• Osmosis is the movement of water across a membrane.
• Passive transport is a general term for processes (like simple diffusion and facilitated diffusion) that do not require energy.
• Question 9:
• Diffusion is the movement of molecules (not specifically water) from an area of high concentration to an area of low concentration.
• Osmosis is the specific movement of water through a membrane.
• Exocytosis is the release of substances from a cell.
• Active transport is the movement of molecules against their concentration gradient and requires energy.
• Question 10:
• Facilitated diffusion is a passive process. It does not require energy (ATP).
• It requires a helper protein (such as a channel protein or a carrier protein) to move molecules (usually polar or large molecules) across the membrane.
• It is not limited to large molecules. Small polar molecules (like some ions) can also be transported by facilitated diffusion.
• It does not require ATP and vesicles. Vesicles are involved in processes like endocytosis and exocytosis.

Answer:

1. C. Active transport
2. B. Endocytosis
3. B. Osmosis
4. B. No energy but a helper protein