tour of the cell
Where would you expect to find proteins involved with movement of structures within a cell?
cytoskeleton
Consider a protein that is made in the rough endoplasmic reticulum. You observe that when the synthesis of the protein is completed, the protein is located in the ER membrane. Where else in the cell might this protein be found?
embedded in the plasma membrane functioning in the transport of molecules into the cell
Which of the following is/are most likely to be involved in the process of producing proteins for a chloroplast or mitochondrion?
free cytoplasmic ribosomes
Cell fractionation _____.
separates cells into their component parts
The observation that chloroplasts and mitochondria each contain their own DNA and synthesize some of the proteins that function in these organelles suggests that chloroplasts and mitochondria _____.
must divide each time the cell containing them divides
A substance moving from outside the cell into the cytoplasm must pass through _____.
plasma mem
Dye injected into a plant cell might be able to enter an adjacent cell through _____.
plasmodesmata
you would expect a cell with an extensive Golgi apparatus to _____.
secrete a lot of protein
Which of the following correctly compares the extracellular matrix (ECM) of animal cells to cell walls of plant cells
Both the ECM and the plant cell wall are composed of varying mixtures of proteins and carbohydrates.
Which of the following statements about chloroplasts and mitochondria is true?
Chloroplasts and mitochondria synthesize some of their own proteins.
fact
Components of the cytoskeleton often mediate the movement of organelles within the cytoplasm.
In terms of cellular function, what is the most important difference between prokaryotic and eukaryotic cells?
Eukaryotic cells are compartmentalized, which allows for specialization.
What is the functional connection between the nucleolus, nuclear pores, and the nuclear membrane?
Subunits of ribosomes are assembled in the nucleolus and pass through the nuclear membrane via the nuclear pores.
Your intestine is lined with individual cells. No fluids leak between these cells from the gut into your body. Why?
The first two answers are correct. Correct. Both are permeable to water and small solutes and both are produced in the ER and Golgi apparatus.
In addition to the fundamental structures required to be defined as a cell, a particular cell also has a nucleus and chloroplasts. Based on this information, this cell could be _____.
a protistal cell and a plant cell
Consider two cells with the same volume but with very different surface areas due to differences in their shapes. The cell with the larger surface area is likely to _____.
be involved in the rapid uptake of compounds from the cell's environment
Which of the following structures is found in animal cells but NOT plant cells
centrioles
Basal bodies are most closely associated with which of the following cell components?
cilia
Which of the following organelles is unlikely to show enhanced abundance in pancreatic cells that secrete large amounts of digestive enzymes?
free cytoplasmic ribosomes
A researcher made an interesting observation about a protein made by the rough endoplasmic reticulum and eventually found in a cell's plasma membrane. The protein in the plasma membrane was actually slightly different from the protein made in the ER. The protein was probably altered in the _____.
golgi ap
Which of the following groups is primarily involved in synthesizing molecules needed by the cell?
ibosome, rough endoplasmic reticulum, smooth endoplasmic reticulum
Chloroplasts and mitochondria are thought to be of prokaryotic origin. One piece of evidence that supports this hypothesis is that these organelles contain prokaryotic-like ribosomes. These ribosomes are probably most similar to ribosomes found _____.
in bacterial cell
A protein that ultimately functions in the plasma membrane of a cell is most likely to have been synthesized _____.
in the rough endoplasmic reticulum
The walls of plant cells are largely composed of polysaccharides and proteins that are synthesized _____.
in the rough endoplasmic reticulum and in the Golgi apparatus
Which of the following categories best describes the function of the rough endoplasmic reticulum?
manufacturing
Which of the following structures is found in eukaryotic but not prokaryotic cells?
mitochondria
Which of the following five membranes is most likely to have a lipid composition that is distinct from the other four?
mitochondrial outer membrane
Cilia and flagella move due to the interaction of the cytoskeleton with which of the following?
motor protein
Which type of cell is most likely to have the most mitochondria? (
muscle cells in the legs of a marathon runner
Which of the following organelles might be found inside other organelles?
ribosomes
Which of the following features do prokaryotes and eukaryotes have in common?
ribosomes, plasma membrane, cytoplasm
