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Mitochondria are found in


A) bacterial cells.
B) animal cells.
C) plant cells.
D) animal and plant cells.
E) all cells.

F) B) and D)
G) All of the above

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The two major components of cell membranes are _____ and _____.


A) phospholipids;DNA
B) DNA;proteins
C) peptidoglycan;phospholipids
D) peptidoglycan;proteins
E) phospholipids;proteins

F) B) and E)
G) B) and D)

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Ribosomes are found in


A) bacterial cells.
B) animal cells.
C) plant cells.
D) animal and plant cells.
E) all cells.

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

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Under a microscope,a cell appears to have a nucleus.This eliminates which type of cell?


A) cheek cell
B) single-cell protist
C) animal cell
D) plant cell
E) bacterial cell

F) A) and C)
G) All of the above

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All of the following describe transport proteins EXCEPT


A) there are hundreds of types in the human body.
B) they are very specific in the type of molecule they transfer.
C) they are embedded in the cell membrane.
D) they allow large molecules to pass across the cell membrane.
E) they help small hydrophobic molecules to pass across the cell membrane.

F) C) and D)
G) B) and D)

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Molecules that can cross the cell membrane by simple diffusion are


A) large.
B) ions.
C) hydrophilic.
D) uncharged molecules.
E) All molecules can cross the cell membrane by simple diffusion.

F) B) and D)
G) A) and E)

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All of the following are true of penicillin EXCEPT


A) Alexander Fleming was the first to study it scientifically.
B) it is produced by bacteria.
C) it was the first medical antibiotic.
D) it revolutionized medicine.
E) it works against gram-positive bacteria.

F) C) and D)
G) A) and D)

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Cell membranes are found in


A) bacterial cells.
B) animal cells.
C) plant cells.
D) animal and plant cells.
E) all cells.

F) C) and E)
G) A) and D)

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Penicillin works by


A) interfering with the ability of bacterial cells to take in nutrients.
B) interfering with the formation of peptidoglycan.
C) interfering with protein formation in bacterial cells.
D) breaking up the DNA in a bacterial cell.
E) breaking up the cell membrane.

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

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If an animal cell is living in water that is much saltier than the cell's cytoplasm,the water


A) will enter the cell.
B) will move out of the cell.
C) will neither move in or out of the cell.
D) will leave the cell,bind salt in the water,and then re-enter the cell.
E) will enter the cell,bind salts in the cytoplasm,and then leave the cell.

F) D) and E)
G) A) and E)

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The instructions for making proteins that a cell needs are found in the


A) nucleus.
B) Golgi apparatus.
C) rough ER.
D) smooth ER.
E) mitochondria.

F) B) and D)
G) C) and D)

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The Golgi apparatus is found in


A) bacterial cells.
B) animal cells.
C) plant cells.
D) animal and plant cells.
E) all cells.

F) B) and D)
G) A) and E)

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All of the following are true of the cell membrane EXCEPT


A) it is a boundary between the environment and the cytoplasm.
B) it is semipermeable.
C) it is stiff and rigid.
D) it is made of phospholipids.
E) it contains proteins that can transport nutrients in and out.

F) A) and D)
G) A) and E)

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Which of the following are NOT composed of cells?


A) bacteria
B) viruses
C) humans
D) plants
E) fungi

F) A) and D)
G) B) and C)

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Penicillin interferes with __________________,causing bacteria to die from ______________.


A) membrane synthesis;intact membranes
B) cell wall synthesis;swelling and rupturing of the cell
C) protein synthesis;an inability to make protein
D) osmosis;dehydration (a lack of internal water)
E) cell division;old age

F) B) and D)
G) B) and C)

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Which of these cellular components is(are) associated with all cells?


A) cell membrane
B) ribosomes
C) DNA
D) cell membrane and ribosomes
E) cell membrane,ribosomes,and DNA

F) A) and E)
G) A) and B)

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Proteins are made


A) by the nucleus.
B) only by eukaryotes.
C) by the Golgi apparatus.
D) by the ribosomes.
E) anywhere in the cytoplasm.

F) A) and B)
G) A) and E)

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