Lysosomes are important to the health of cells because they break down worn-out cell parts that are no longer needed. They contain digestive enzymes that help degrade and recycle cellular components, which is essential for maintaining cellular function and health.
Why are lysosomes important to the health of cells?(1 point)
Responses
They create cell boundaries and make cells rigid.
They create cell boundaries and make cells rigid.
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.
9 answers
Using your understanding of the function of chloroplasts and specialized cells, infer why plant root cells lack chloroplasts.(1 point)
Responses
Roots require fewer nutrients.
Roots require fewer nutrients.
Root cells have two central vacuoles.
Root cells have two central vacuoles.
Roots are underground and are not exposed to sunlight.
Roots are underground and are not exposed to sunlight.
Root cells have many mitochondria.
Responses
Roots require fewer nutrients.
Roots require fewer nutrients.
Root cells have two central vacuoles.
Root cells have two central vacuoles.
Roots are underground and are not exposed to sunlight.
Roots are underground and are not exposed to sunlight.
Root cells have many mitochondria.
Plant root cells lack chloroplasts because roots are underground and are not exposed to sunlight. Chloroplasts are essential for photosynthesis, which requires light, and since root cells do not receive light, they do not need chloroplasts for this function.
What is the main difference between prokaryotic and eukaryotic cells?(1 point)
Responses
Prokaryotes use RNA instead of DNA.
Prokaryotes use RNA instead of DNA.
Prokaryotes lack membrane-bound organelles.
Prokaryotes lack membrane-bound organelles.
Prokaryotes lack a cell membrane on the outside.
Prokaryotes lack a cell membrane on the outside.
Prokaryotes lack ribosomes to make proteins.
Responses
Prokaryotes use RNA instead of DNA.
Prokaryotes use RNA instead of DNA.
Prokaryotes lack membrane-bound organelles.
Prokaryotes lack membrane-bound organelles.
Prokaryotes lack a cell membrane on the outside.
Prokaryotes lack a cell membrane on the outside.
Prokaryotes lack ribosomes to make proteins.
The main difference between prokaryotic and eukaryotic cells is that prokaryotes lack membrane-bound organelles. Prokaryotic cells are generally simpler and do not have structures such as a nucleus, while eukaryotic cells contain these specialized organelles.
Use the image to answer the question.
An oval-shaped cell with some dots on the inside.
What type of cell is in the center of the image below? How do you know?
(1 point)
Responses
Eukaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Eukaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Eukaryotic cell because it has dots on the inside of the cell, these are membrane-bound organelles.
Eukaryotic cell because it has dots on the inside of the cell, these are membrane-bound organelles.
Prokaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Prokaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Prokaryotic cell because it has dots on the inside of the cell, these are membrane-bound organelles.
An oval-shaped cell with some dots on the inside.
What type of cell is in the center of the image below? How do you know?
(1 point)
Responses
Eukaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Eukaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Eukaryotic cell because it has dots on the inside of the cell, these are membrane-bound organelles.
Eukaryotic cell because it has dots on the inside of the cell, these are membrane-bound organelles.
Prokaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Prokaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
Prokaryotic cell because it has dots on the inside of the cell, these are membrane-bound organelles.
The appropriate response is: Prokaryotic cell because it does not have a nucleus, which would look like a solid circle in the cell.
This indicates that the cell lacks the membrane-bound structures characteristic of eukaryotic cells, including a distinct nucleus.
Which of the following is true about how mitochondria were acquired by host cells? (1 point)
Responses
A bacteria cell was engulfed into a host cell through the process of phagocytosis.
A bacteria cell was engulfed into a host cell through the process of phagocytosis.
A mitochondria cell’s membrane folded outward, creating a larger cell around itself.
A mitochondria cell’s membrane folded outward, creating a larger cell around itself.
A eukaryotic cell gave up its mitochondria to another cell through phagocytosis.
A eukaryotic cell gave up its mitochondria to another cell through phagocytosis.
The cell’s membrane folded inward, creating a pocket within itself called the mitochondria.
The cell’s membrane folded inward, creating a pocket within itself called the mitochondria.
Responses
A bacteria cell was engulfed into a host cell through the process of phagocytosis.
A bacteria cell was engulfed into a host cell through the process of phagocytosis.
A mitochondria cell’s membrane folded outward, creating a larger cell around itself.
A mitochondria cell’s membrane folded outward, creating a larger cell around itself.
A eukaryotic cell gave up its mitochondria to another cell through phagocytosis.
A eukaryotic cell gave up its mitochondria to another cell through phagocytosis.
The cell’s membrane folded inward, creating a pocket within itself called the mitochondria.
The cell’s membrane folded inward, creating a pocket within itself called the mitochondria.
The correct response is: A bacteria cell was engulfed into a host cell through the process of phagocytosis.
This is consistent with the endosymbiotic theory, which suggests that mitochondria originated from free-living bacteria that were engulfed by a primitive eukaryotic cell.