Chapter 4:A Tour of The Cell

Which of the following statements correctly describes a common characteristic of cell walls and the cell extracellular matrix?

Both are external to the plasma membrane.

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 an carbohydrates.

Which of the following structures is found in animal cells but not plant cells?

Centrioles

Which of the following statements about chloroplasts and mitochondria is true?

Chloroplasts and mitochondria synthesize some of their own proteins.

Which structure is not part of the endomembrane system?

Chlorplast

Basal bodies are most closely associated with which of the following cell components?

Cilia

Which statement about the cytoskeleton is true?

Components of the cytoskeleton often mediate the movement of organelles within the cytoplasm.

Which of the following is/are possible site(s) of protein synthesis in a typical eukaryotic cell?

Cytoplasm, rough endoplasmic reticulum (ER), and mitochondria.

Which is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?

ER----Golgi-----cesicles that fuse with plasma membrane.

In term of cellular function, what is the most important difference between prokaryotic and eukaryotic cells?

Eukaryotic cell posses specialized membrane-bounded organelles.

A researcher made an interesting observation about protein made by the rough endoplasmic reticule (ER) and eventually found in the cell;s plasma membrane. The protein in the plasma membrane was actually slightly different from the protein madden the ER. The protein was probably altered in the ___________.

Golgi Apparatus

Bacterial cells are prokaryotic. Unlike a typical eukaryotic cell, they ____________.

Have no membrane - bounded organelles.

A researcher wants to film the movement of chromosomes during cell division. Which type of microscope should she choose, and which is it the best choice?

Light microscope because the specimen is alive.

Which of the following categories best describes the function of the rough endoplasmic reticulum (ER)?

Manufacturing

Which of the following structures is found in eukaryotic b not prokaryotic cells?

Mitochondria

Which structure is common to plant and animal cells?

Mitochondrion

Cilia and flagella move due to the interaction of the cytoskeleton with which of the following?

Motor proteins

Which type of cell is likely to have the most mitochondria?

Muscle cells in the legs of a marathon runner

Dye injected into a plant cell might be able to enter an adjacent cell through_________.

Plasmodesmata.

Which of the following features do prokaryotes and eukaryotes have in common?

Ribosomes, plasma membrane, and cytoplasm.

You would expect a cell with an extensive Golgi apparatus to __________.

Secrete a lot of protein.

Cell fractionation____________.

Separates cells into their components parts.

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 that absorb nutrients. No fluids leak between theses cells from the interior of the intestine.Why?

The intestinal cells are bound together by tight junctions.

A dish of animal cells was grown in the presence of radioactive phosphorous. The phosphorus largely ended up in nucleotides inside the actively growing animal cells. In which cellular structure(s) would you predict the majority of the radioactive phosphorous to accumulate?

The nucleus