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A nerve cell and a muscle cell have the same genes, but express different subsets of them.

A) True
B) False

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Which of the following correctly describes the structural organization of the cell membrane?


A) A solid, rigid layer of phospholipid with loosely bound protein molecules
B) A bilayer of phospholipid molecules in which protein molecules are embedded and can move
C) Rigid layers of protein molecules in which carbohydrate molecules are suspended
D) Three layers; lipid on the inside, protein in the middle, and carbohydrates (and polysaccharides) on the outside

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

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Transcytosis combines diffusion and active transport.

A) True
B) False

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The nucleus is in the nucleolus.

A) True
B) False

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False

Osmosis is the movement of


A) molecules from a high concentration to a low concentration.
B) water molecules from a high concentration to a low concentration through a selectively permeable membrane.
C) water molecules from a low concentration to a high concentration through a selectively permeable membrane.
D) ions from a low pressure region to a high pressure region through a selectively permeable membrane.

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

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A selectively permeable membrane


A) allows all substances to pass through.
B) allows all organic substances to pass through but excludes all inorganic substances.
C) allows some substances to pass through and excludes others.
D) does not allow any substances to pass through.

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

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Mitosis occurs in _______ cells.

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Filtration is the movement of molecules through a membrane


A) from low concentration to high concentration.
B) from low to high hydrostatic pressure.
C) by hydrostatic pressure that is greater on one side of the membrane than on the other.
D) from low osmotic pressure to high osmotic pressure.

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

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The relationship of osmotic pressure and the number of solute particles in a solution is:


A) the lower the number of solute particles, the greater the osmotic pressure.
B) the greater the number of solute particles, the lower the osmotic pressure.
C) the greater the osmotic pressure, the lower the number of solute particles.
D) the greater the number of solute particles, the greater the osmotic pressure.

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

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D

The movement of molecules through a membrane by filtration requires


A) osmotic pressure.
B) hydrostatic pressure.
C) atmospheric pressure.
D) barometric pressure.

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

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B

The process by which cells specialize is called differentiation.

A) True
B) False

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The sequence of organelles and cell parts involved in milk secretion is


A) cell membrane, vesicles, Golgi apparatus, endoplasmic reticulum, nucleus.
B) nucleus, endoplasmic reticulum, Golgi apparatus, vesicles, cell membrane.
C) nucleus, nucleolus, nuclear envelope, cell membrane.
D) vesicles, Golgi apparatus, mitochondrion, cell membrane.

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

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Which organelle contains the nucleolus?


A) The mitochondrion
B) The endoplasmic reticulum
C) The Golgi apparatus
D) The nucleus

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

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Energy is stored in ATP molecules in ribosomes.

A) True
B) False

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Loss of cell cycle control can cause cancer.

A) True
B) False

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Krabbe disease results from an abnormality that affects the _______ of nerve cells in the brain.

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Apoptosis is a slow version of mitosis.

A) True
B) False

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A cell undergoing ________ loses its shape, forms bubble, and falls apart.

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The three major parts of a cell are


A) the endoplasmic reticulum, Golgi apparatus, and vesicles.
B) the nucleus, nucleolus, and nuclear envelope.
C) microtubules, ribosomes, and centrosomes.
D) the nucleus, cytoplasm, and cell membrane.

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

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The process by which a cell receives and responds to incoming messages is called __________ transduction.

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