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Exam 4: Cell Structure

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Question 31

Multiple Choice

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Prokaryotic cell movement is attributed to the

A) capsule.
B) ribosomes.
C) pili.
D) nucleoid area.
E) flagella.

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Question 32

Multiple Choice

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The functions of the cytoskeleton include all of the following except

A) providing the cell shape.
B) providing scaffolding for the enzymes in certain areas of the cell.
C) organizing the cell's activities.
D) providing movement of molecules in the cell.
E) ribosome assembly.

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Question 33

Multiple Choice

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Which of the following is not bounded by membranes?

Nuclear pores apparently permit the passage of only

Many eukaryotic cells possess flagella or cilia,which have the characteristic ______ arrangement of microtubules.

___________ is the generally accepted evolutionary process which created the organelles,chloroplasts,and mitochondria.

The cytoplasmic space in eukaryotic cells is occupied by many diverse membrane-bound structures with specific cellular functions.These are called

A semi-fluid matrix called the _________ occupies the area between the nucleus and the plasma membrane.

The _________ is not only responsible for the cell's shape and movement,but it also provides a scaffolding at certain locations of the cytoplasm for some enzymes and macromolecules.

The endosymbiotic theory is supported by the finding of non-nuclear DNA in which of the following organelles?

Which of the following is not present in all eukaryotic cells?

All plants contain chloroplasts with both chlorophyll a and b.By comparison,almost all prokaryotic organisms only contain chlorophyll a.One exception is Prochloron,which contains both chlorophyll a and b.According to the endosymbiotic theory,how did photosynthetic plants arise and how did the discovery of Prochloron in the 1970's lend support to this theory?

Some ribosomes are embedded into

If you were to use antibodies that were chemically bonded to a stain in order to visualize the expression pattern of a protein in a fixed tissue,which of the following experimental techniques and equipment would be applicable?

A cytologist is examining a tissue under an electron microscope.He notices in particular that the endoplasmic reticulum of each cell is extremely rough in appearance and of course knows that the rough appearance is because of the ribosomes embedded there.He is curious about why there are so many ribosomes.You can help.Your response would be,

Which structure is the repository of the genetic information that directs all of the activities of the cell?

If you were working inside of a cell and you needed to move a vesicle along microtubules toward the center of the cell,which molecular motor(s) would you choose to help you?

During which cellular process do all three forms of RNA associate?

Which of the following is not visible by use of a light microscope?

A cell biologist has developed a new drug that will block the cis face of the Golgi apparatus.If eventually approved by the FDA,she wants to use this new drug to aid cancer patients.What specifically will this drug prevent from happening inside a cancer cell?