Question 1

What type of membrane proteins have an exposed site on the outer cell surface that can attach to a ligand?

Accepted Answer

A)   marker molecules
B)   receptor proteins
C)   channel protein
D)   carrier proteins
E)   enzymesF) B) and C)
G) A) and B)

Question 2

In order to study in detail the anatomy of internal cell parts, it would be best to use

Accepted Answer

A)   a transmission electron microscope (TEM) .
B)   a scanning electron microscope (SEM) .
C)   tissue cultures.
D)   flashlights.
E)   x-rays.F) B) and D)
G) A) and B)

Question 3

Glycolipids would contain both lipids and

Accepted Answer

A)   amino acids.
B)   electrolytes.
C)   proteins.
D)   cholesterol.
E)   carbohydrates.F) A) and B)
G) A) and E)

Question 4

According to the most current model of the plasma membrane,

Accepted Answer

A)   the membrane is a rigid unchanging structure.
B)   cholesterol forms the innermost layer of the membrane.
C)   phospholipids and cholesterol form a single lipid bilayer.
D)   proteins are free to move about within a double layer of phospholipids.
E)   the membrane is impermeable to all other molecules.F) D) and E)
G) A) and B)

Question 5

Endocytosis

Accepted Answer

A)   is a process that requires a carrier molecule but does not use cellular energy.
B)   moves material out of the cell.
C)   ends cell functions.
D)   is movement of water through a selectively permeable membrane.
E)   is the bulk uptake of material through the plasma membrane by vesicle formation.F) A) and B)
G) A) and E)

Question 6

-Red blood cells (RBCs)  have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "B" relative to the RBC?

Accepted Answer

A)   hemolyzed
B)   isotonic solution
C)   hypertonic solution
D)   crenated
E)   hypotonic solutionF) A) and E)
G) B) and C)

Question 7

The function of the Golgi apparatus is

Accepted Answer

A)   packaging and distribution of proteins and lipids.
B)   production of microtubules.
C)   DNA replication.
D)   energy production.
E)   excretion of excess salt.F) None of the above
G) A) and D)

Question 8

The cytoskeleton consists of

Accepted Answer

A)   ribosomes, the nucleus, and the Golgi apparatus.
B)   microfilaments, mitochondria, and lipochromes.
C)   microtubules, actin filaments, and intermediate filaments.
D)   actin filaments, mitochondria, and intermediate filaments.
E)   lipochromes, microfilaments, and microtubules.F) B) and D)
G) C) and D)

Question 9

Certain cells in the liver ingest bacteria and debris from damaged cells by a process called

Accepted Answer

A)   pinocytosis.
B)   biocytosis.
C)   exocytosis.
D)   calmly regulated diffusion.
E)   phagocytosis.F) A) and C)
G) A) and E)

Question 10

At the base of each cilium is a structure called the

Accepted Answer

A)   kinetochore.
B)   basal body.
C)   dynein arm.
D)   centrosome.
E)   None of these choices is correct.F) C) and D)
G) A) and B)

Question 11

A toxic drug destroyed the Golgi apparatus. This would affect

Accepted Answer

A)   packaging of glycoproteins and lipoproteins.
B)   energy production.
C)   microtubule production.
D)   intracellular digestion.
E)   ribosomal RNA synthesis.F) All of the above
G) B) and C)

Question 12

If a toxic drug inhibited mRNA synthesis, which of the following would be most directly affected?

Accepted Answer

A)   protein synthesis
B)   intracellular digestion
C)   active transport
D)   microtubule production
E)   secretion of glycoproteins and lipoproteinsF) A) and B)
G) B) and C)

Question 13

What is membrane potential?

Accepted Answer

A)   The rate of ATP production and transport by mitochondria.
B)   The ability of a membrane to actively transport carbohydrates out of the cytoplasm.
C)   The electrical charge difference across the membrane caused by ion movement.
D)   The ability of molecules to pass through the nuclear membrane.E) All of the above
F) B) and C)

Question 14

Large molecules move across cell membrane with the help or assistance of protein carriers. This type of transport is generically called _______.

Accepted Answer

A)   mediated transport
B)   passive transport
C)   active transportD) A) and C)
E) All of the above

Question 15

-Red blood cells (RBCs)  have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution "B"?

Accepted Answer

A)   crenated
B)   hypertonic solution
C)   isotonic solution
D)   hemolyzed
E)   hypotonic solutionF) B) and D)
G) B) and C)

Question 16

Which molecule determines the fluidity of the plasma membrane?

Accepted Answer

A)   Protein
B)   Cholesterol
C)   PhospholipidD) A) and B)
E) A) and C)

Question 17

What type of cell has abundant mitochondria?

Accepted Answer

A)   fibroblast (makes protein fibers) 
B)   liver cells that detoxify hydrogen peroxide
C)   white blood cell, a phagocyte
D)   mucus cell (secretes mucus) 
E)   cardiac muscle cells (require large amounts of ATP) F) A) and B)
G) C) and D)

Question 18

The lower limit of resolution of a light microscope is

Accepted Answer

A)   1.0 μ\muμ m
B)   0.01 μ\muμ m
C)   100 μ\muμ m
D)   0.1 μ\muμ m
E)   10 μ\muμ m F) B) and E)
G) A) and D)

Question 19

Messenger RNA

Accepted Answer

A)   is synthesized when a portion of a DNA molecule is transcribed.
B)   directs the synthesis of DNA.
C)   is not involved in the synthesis of proteins.
D)   determines the sequence of nucleotides in the anticodons of tRNA.
E)   directs the synthesis of centrioles in the cytoplasm.F) B) and E)
G) C) and D)

Question 20

In _______, ions or molecules move in opposite directions.

Accepted Answer

A)   uniport
B)   ionport
C)   antiport
D)   symport
E)   comportF) B) and E)
G) C) and D)

Exam 3: Cell Biology

Which molecule determines the fluidity of the plasma membrane?

Correct AnswerverifiedShow Answer

What is membrane potential?

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-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "B" relative to the RBC?

Correct AnswerverifiedShow Answer

Endocytosis

Correct AnswerverifiedShow Answer

The function of the Golgi apparatus is

Correct AnswerverifiedShow Answer

The lower limit of resolution of a light microscope is

Correct AnswerverifiedShow Answer

What type of membrane proteins have an exposed site on the outer cell surface that can attach to a ligand?

Correct AnswerverifiedShow Answer

Glycolipids would contain both lipids and

Correct AnswerverifiedShow Answer

Certain cells in the liver ingest bacteria and debris from damaged cells by a process called

Correct AnswerverifiedShow Answer

In _______, ions or molecules move in opposite directions.

Correct AnswerverifiedShow Answer

Large molecules move across cell membrane with the help or assistance of protein carriers. This type of transport is generically called _______.

Correct AnswerverifiedShow Answer

At the base of each cilium is a structure called the

Correct AnswerverifiedShow Answer

If a toxic drug inhibited mRNA synthesis, which of the following would be most directly affected?

Correct AnswerverifiedShow Answer

The cytoskeleton consists of

Correct AnswerverifiedShow Answer

Messenger RNA

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According to the most current model of the plasma membrane,

Correct AnswerverifiedShow Answer

In order to study in detail the anatomy of internal cell parts, it would be best to use

Correct AnswerverifiedShow Answer

What type of cell has abundant mitochondria?

Correct AnswerverifiedShow Answer

A toxic drug destroyed the Golgi apparatus. This would affect

Correct AnswerverifiedShow Answer

-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution "B"?

Correct AnswerverifiedShow Answer

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