Question

question 6 (1 point)
how would a large molecule like a big polysaccharide get into the cell?
a facilitated diffusion
b exocytosis
c endocytosis

question 7 (1 point)
which one is not a type of endocytosis?
a pinocytosis
b receptor - mediated endocytosis
c exocytosis
d phagocytosis

question 8 (1 point)
by which process do the carbohydrates leave the plant cell in order to build the cell wall?
a exocytosis
b pinocytosis
c endocytosis

Explanation:

Question 6

To determine how a large molecule like a big polysaccharide enters the cell, we analyze the options:

• Option a: Facilitated diffusion is for small, polar molecules or ions moving down their concentration gradient with a transport protein. Large molecules like polysaccharides can't use this.
• Option b: Exocytosis is the process of a cell releasing substances (like proteins or waste) out of the cell, not taking in.
• Option c: Endocytosis is a process where the cell membrane engulfs large molecules or particles to bring them into the cell. Polysaccharides are large, so endocytosis is the way they enter.

To find which is not a type of endocytosis, we recall:

• Option a: Pinocytosis (cell drinking) is a type of endocytosis where the cell takes in fluid and dissolved solutes.
• Option b: Receptor - mediated endocytosis is a specific form of endocytosis that uses receptors to bring in specific molecules.
• Option c: Exocytosis is the process of a cell releasing substances (like vesicles fusing with the membrane to release contents outside), which is the opposite of endocytosis (bringing substances in).
• Option d: Phagocytosis (cell eating) is a type of endocytosis where the cell engulfs large particles or whole cells.

To determine how carbohydrates leave the plant cell to build the cell wall, we analyze the options:

• Option a: Exocytosis is the process where vesicles containing substances (like carbohydrates needed for cell wall building) fuse with the cell membrane and release their contents outside the cell. This is how carbohydrates would be transported out to build the cell wall.
• Option b: Pinocytosis is a type of endocytosis (bringing substances into the cell), not for releasing substances out.
• Option c: Endocytosis is for bringing substances into the cell, not releasing them out.

Answer:

c. endocytosis

Question 7