Question 1

play an important role in cell division, and they are made of .

Accepted Answer

A)  Mitochondria; microtubules
B)  Ribosomes; intermediate filaments
C)  Nucleoli; microfilaments
D)  Centrioles; microtubules
E)  Inclusions; centrosomesF) A) and C)
G) C) and E)

Question 2

are the most abundant molecules in the plasma membrane.

Accepted Answer

A)  Glycolipids
B)  Phospholipids
C)  Prostaglandins
D)  Proteins
E)  Cholesterol moleculesF) A) and C)
G) A) and B)

Question 3

In its second-messenger role, cAMP activates enzymes called , whose job is to regulate other enzymes by adding phosphate groups to them.

Accepted Answer

A)  transmembrane proteins
B)  peripheral proteins
C)  kinases
D)  glycocalyx
E)  blockersF) A) and E)
G) C) and D)

Question 4

Gates respond to all these stimuli except

Accepted Answer

A)  chemical messengers.
B)  ligands.
C)  changes in electrical potential (voltage)  across the plasma membrane.
D)  physical deformation of the plasma membrane.
E)  water in the extracellular fluid.F) C) and D)
G) B) and C)

Question 5

This figure shows the plasma membrane.What does "A" represent?

Accepted Answer

A)  a peripheral protein
B)  a channel protein
C)  a glycoprotein
D)  cholesterol
E)  a phospholipidF) None of the above
G) A) and D)

Question 6

The most important advantage of transmission electron microscope (TEM) over light microscope
(LM) is its higher resolution.

Accepted Answer

A) True 
 B)False

Question 7

is not involved in protein synthesis.

Accepted Answer

A)  Smooth ER
B)  Rough ER
C)  The Golgi complex
D)  The nucleus
E)  RibosomesF) All of the above
G) A) and E)

Question 8

Facilitated diffusion and active transport have in common that both

Accepted Answer

A)  are processes involving transport of a solute up its concentration gradient.
B)  are processes involving transport of a solute down its concentration gradient.
C)  are processes involving the use of energy provided by ATP.
D)  are processes ATP independent.
E)  are cases of carrier-mediated transport.F) C) and E)
G) A) and C)

Question 9

Both the nucleus and the mitochondrion are surrounded by two layers of unit membrane.

Accepted Answer

A) True 
 B)False

Question 10

This organelle synthesizes steroids in the ovary and stores calcium in muscle cells.

Accepted Answer

A)  smooth endoplasmic reticulum
B)  rough endoplasmic reticulum
C)  nucleus
D)  mitochondrion
E)  Golgi complexF) D) and E)
G) B) and C)

Question 11

are membrane proteins that bind to signals by which cells communicate.

Accepted Answer

A)  Receptors
B)  Enzymes
C)  Carriers
D)  Cell-identity markers
E)  Cell-adhesion moleculesF) A) and B)
G) A) and E)

Question 12

Insulin is taken up by endocytosis by endothelial cells lining capillaries, and then transported across the cell to the other side, where it is released.This transport is called

Accepted Answer

A)  pinocytosis.
B)  receptor-mediated phagocytosis.
C)  passive transport.
D)  facilitated transport.
E)  transcytosis.F) B) and C)
G) A) and E)

Question 13

A red blood cell is placed in a hypertonic solution.The concentration of solutes in the solution is than the concentration of solutes in the intracellular fluid and will cause the cell to
)

Accepted Answer

A)  higher; swell
B)  lower; swell
C)  higher; shrink
D)  lower; shrink
E)  lower; burstF) D) and E)
G) All of the above

Question 14

act like identification tags in the glycocalyx that enable the body to distinguish its own cells from foreign and diseased cells.

Accepted Answer

A)  Glycoproteins
B)  Lipoproteins
C)  Cholesterol molecules
D)  Phospholipids
E)  Cell-adhesion moleculesF) D) and E)
G) A) and D)

Question 15

These are all membranous organelles except

Accepted Answer

A)  mitochondria.
B)  ribosomes.
C)  the nucleus.
D)  endoplasmic reticulum.
E)  the Golgi complex.F) D) and E)
G) C) and E)

Question 16

This figure shows the structure of a representative cell.What does "B" represent?

Accepted Answer

A)  Golgi complex
B)  rough ER
C)  smooth ER
D)  mitochondrion
E)  nucleolusF) B) and C)
G) C) and E)

Question 17

A crystal of calcium phosphate in the cytoplasm of a cell should be classified as an inclusion.

Accepted Answer

A) True 
 B)False

Question 18

decompose fatty acids, and detoxify alcohol, free radicals, and drugs.

Accepted Answer

A)  Lysosomes
B)  Microvilli
C)  Inclusions
D)  Peroxisomes
E)  Golgi vesiclesF) B) and D)
G) B) and C)

Question 19

What function would immediately cease if the ribosomes of a cell were destroyed?

Accepted Answer

A)  exocytosis
B)  active transport
C)  ciliary action
D)  protein synthesis
E)  osmosisF) A) and E)
G) A) and D)

Question 20

consume ATP when transferring solutes from one side to the other side of the plasma membrane.

Accepted Answer

A)  Receptors
B)  Pumps
C)  Cell-adhesion molecules
D)  Channels
E)  Cell-identity markersF) B) and E)
G) A) and E)

Exam 3: Cellular Form and Function

are membrane proteins that bind to signals by which cells communicate.

Correct AnswerverifiedShow Answer

What function would immediately cease if the ribosomes of a cell were destroyed?

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Facilitated diffusion and active transport have in common that both

Correct AnswerverifiedShow Answer

consume ATP when transferring solutes from one side to the other side of the plasma membrane.

Correct AnswerverifiedShow Answer

Both the nucleus and the mitochondrion are surrounded by two layers of unit membrane.

Correct AnswerverifiedShow Answer

is not involved in protein synthesis.

Correct AnswerverifiedShow Answer

Gates respond to all these stimuli except

Correct AnswerverifiedShow Answer

decompose fatty acids, and detoxify alcohol, free radicals, and drugs.

Correct AnswerverifiedShow Answer

A crystal of calcium phosphate in the cytoplasm of a cell should be classified as an inclusion.

Correct AnswerverifiedShow Answer

are the most abundant molecules in the plasma membrane.

Correct AnswerverifiedShow Answer

The most important advantage of transmission electron microscope (TEM) over light microscope (LM) is its higher resolution.

Correct AnswerverifiedShow Answer

This figure shows the plasma membrane.What does "A" represent?

Correct AnswerverifiedShow Answer

This organelle synthesizes steroids in the ovary and stores calcium in muscle cells.

Correct AnswerverifiedShow Answer

play an important role in cell division, and they are made of .

Correct AnswerverifiedShow Answer

In its second-messenger role, cAMP activates enzymes called , whose job is to regulate other enzymes by adding phosphate groups to them.

Correct AnswerverifiedShow Answer

Insulin is taken up by endocytosis by endothelial cells lining capillaries, and then transported across the cell to the other side, where it is released.This transport is called

Correct AnswerverifiedShow Answer

This figure shows the structure of a representative cell.What does "B" represent?

Correct AnswerverifiedShow Answer

These are all membranous organelles except

Correct AnswerverifiedShow Answer

A red blood cell is placed in a hypertonic solution.The concentration of solutes in the solution is than the concentration of solutes in the intracellular fluid and will cause the cell to )

Correct AnswerverifiedShow Answer

act like identification tags in the glycocalyx that enable the body to distinguish its own cells from foreign and diseased cells.

Correct AnswerverifiedShow Answer

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