Question

for questions 19 - 22, write true if the statement is true. if the statement is false, change the underlined word or words to make the statement true.

1. chloroplasts are never found in animal cells.
2. unlike chloroplasts, mitochondria are surrounded by a double - membrane.
3. nearly all of the mitochondria in your cells were inherited from your mother.
4. both chloroplasts and mitochondria lack genetic information in the form of dna.

cellular boundaries
for questions 23 - 25, complete each statement by writing the correct word or words.

1. most cell ____ are porous to water and other materials but strong enough to support and protect cells.
2. nearly all of the plant tissue called ____ is made up of cell walls.
3. besides supporting and protecting a cell, the cell membrane ____ what enters and leaves the cell.
4. complete the diagram of a section of a cell membrane. then, on the line below the diagram, write the name of the model that describes the cell membrane’s structure.

apply the big idea

1. what is the function of vesicles in the synthesis of proteins and the release of those proteins outside the cell?

Explanation:

1. Chloroplasts are organelles for photosynthesis in plant - like cells and not in animal cells, so the statement is True.
2. Chloroplasts are unique to plant and some protist cells, not found in animal cells, True.
3. Mitochondria have a double - membrane structure, True.
4. Mitochondrial DNA is maternally inherited, but chloroplasts are not relevant in human cells as humans don't have chloroplasts, and mitochondria have DNA, so the statement is False. It should be "Mitochondria have genetic information in the form of DNA and nearly all of the mitochondria in your cells were inherited from your mother."
5. Cell walls are porous to water and other materials and provide support and protection.
6. The plant tissue called xylem and phloem contain cell walls, but the general term for plant tissue made up of cell walls is parenchyma, collenchyma, and sclerenchyma. Commonly, parenchyma is a major one.
7. The cell membrane controls what enters and leaves the cell.
8. The model is the fluid - mosaic model. The diagram shows a phospholipid bilayer with embedded proteins and other components.
9. Vesicles transport proteins from the endoplasmic reticulum to the Golgi apparatus for modification, and then from the Golgi apparatus to the cell membrane for secretion outside the cell.

Answer:

1. True
2. True
3. True
4. False; Mitochondria have genetic information in the form of DNA and nearly all of the mitochondria in your cells were inherited from your mother.
5. walls
6. parenchyma
7. controls
8. Fluid - mosaic model
9. Vesicles transport proteins from the endoplasmic reticulum to the Golgi apparatus and then from the Golgi apparatus to the cell membrane for secretion outside the cell.