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Coated pits containing clathrin do not permit concentration of ingested macromolecules prior to endocytosis.

A) True
B) False

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Which of the following must leave the nucleus via the nuclear pore complexes?


A) Immature ribosomal subunits
B) tRNA
C) mRNA
D) Immature ribosomal subunits,tRNA,and mRNA

E) B) and D)
F) None of the above

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A newly discovered microorganism has a circular chromosome that is complexed with histones,but not enclosed within a membrane.The plasma membrane lipids include glycerol dietethers and diglycerol tetraethers.There are no mitochondria or chloroplasts,but the cells do contain 70s ribosomes.This microbe most likely is


A) a bacterium.
B) an archaeon.
C) a protozoan.
D) a fungus.

E) A) and B)
F) B) and C)

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B

The most important distinguishing feature of eukaryotes that is lacking in prokaryotes is


A) the presence of a cell wall in eukaryotes.
B) the cell respiration process which if fundamentally different in prokaryotes.
C) the DNA replication mechanism .
D) the division of the cell into compartments bounded by membranes.

E) B) and C)
F) All of the above

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Which of the following is a function of the mitochondrion?


A) Tricarboxylic acid cycle enzyme reactions
B) Electron transport
C) ATP synthesis
D) All of the choices are correct.

E) A) and C)
F) A) and B)

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Ribosomes synthesizing proteins that are to be excreted are located on the __________.

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endoplasmi...

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Which of the following has flagella that wave back and forth?


A) Archaea
B) Bacteria
C) Eukarya

D) All of the above
E) A) and B)

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The food vacuoles and phagocytic vacuoles are most similar to


A) mitochondria.
B) chloroplasts.
C) lysosomes.
D) Golgi apparatus.

E) A) and B)
F) B) and C)

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Which cell type ranges in size from about 10 - 100 ยตm,has 80s ribosomes,and has internal compartments bounded by membranes?


A) Archaea
B) Bacteria
C) Eukarya

D) B) and C)
E) All of the above

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Which of the following has flagella that contain microtubules ?


A) Archaea
B) Bacteria
C) Eukarya

D) B) and C)
E) A) and C)

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Microdomains in eukaryotic plasma membranes can participate in


A) cell movement.
B) cell division.
C) signal transduction.
D) All of the choices are correct.

E) B) and C)
F) None of the above

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A newly discovered unicellular microbe has a nucleus containing linear chromosomes and surrounded by a membrane.It has mitochondria,80s ribosomes,and is covered by cilia.There is no cell wall external to the plasma membrane.This organism most likely would be a/an


A) bacterium.
B) archaeon.
C) protozoan.
D) fungus.
E) algae.

F) None of the above
G) B) and D)

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The process by which a cell imports large particles by enclosing them in vesicles pinched off from the plasma membrane is called


A) exocytosis.
B) phagocytosis.
C) pinocytosis.
D) nutrient cytosis.

E) A) and B)
F) A) and C)

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A eukaryotic flagellum can either push a cell through a liquid environment or pull it through depending on the undulating pattern of movement.

A) True
B) False

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The endoplasmic reticulum is mostly devoid of ribosomes (smooth)when cells are producing large quantities of lipid.

A) True
B) False

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Where is the glycolysis pathway located in a cell?


A) Cristae of the mitochondria
B) Matrix of the mitoconddria
C) Smooth endoplasmic reticulum
D) Cytoplasm

E) B) and C)
F) None of the above

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D

The inner membrane system of chloroplasts consists of flattened sacs called __________ that form stacks called __________.

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The major site of cell membrane synthesis is the


A) nucleus.
B) plasma membrane.
C) lysosome.
D) endoplasmic reticulum.

E) A) and B)
F) All of the above

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Endocytic events


A) add membrane to the cell surface.
B) remove membrane from the cell surface.
C) have no effect on the plasma membrane.

D) None of the above
E) All of the above

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B

The formation of carbohydrate (CO2 fixation) in the dark reaction of photosynthesis,takes place in the


A) stroma.
B) cytoplasm.
C) thylakoid membrane.
D) nucleus.

E) B) and C)
F) C) and D)

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