Why are lysosomes important to the health of cells?(1 point)
Responses
They move proteins around the cell.
They move proteins around the cell.
They break down worn-out cell parts that are no longer needed.
They break down worn-out cell parts that are no longer needed.
They allow cell organelles to move freely through the cell as needed.
They allow cell organelles to move freely through the cell as needed.
They create cell boundaries and make cells rigid.
They break down worn-out cell parts that are no longer needed.
Which of the following organelles provide structure and rigidity to a plant cell?(1 point)
Responses
ribosome
ribosome
chloroplast
chloroplast
cell membrane
cell membrane
cell wall
cell wall
The correct answer is: They break down worn-out cell parts that are no longer needed.
The correct answer is: They break down worn-out cell parts that are no longer needed.
Lysosomes are membrane-bound organelles found in cells. They contain enzymes that help break down molecules, including proteins, carbohydrates, lipids, and nucleic acids. One of the main functions of lysosomes is to break down and recycle cellular waste materials, such as worn-out cell parts, debris, and foreign invaders like bacteria. This process is called autophagy.
To arrive at the correct answer, you can eliminate the other options by understanding their functions:
- The option "They move proteins around the cell" is incorrect because lysosomes are not involved in protein transport within the cell. That function is primarily carried out by the endoplasmic reticulum, Golgi apparatus, and various vesicles.
- The option "They allow cell organelles to move freely through the cell as needed" is incorrect because lysosomes themselves are organelles and do not facilitate the movement of other organelles within the cell.
- The option "They create cell boundaries and make cells rigid" is incorrect because lysosomes do not play a role in creating cell boundaries or contributing to the rigidity of cells. Instead, this function is primarily performed by the cell membrane and the cytoskeleton.
Therefore, the correct answer is that lysosomes are important for breaking down worn-out cell parts that are no longer needed.