Question 1

In the nucleus, DNA is wrapped with proteins. This complex is called

Accepted Answer

A)  chromatin. 
B)  cytoplasmic organelles. 
C)  DNA particles. 
D)  nucleoli. 
E)  a DNA wrap. 
A)  chromatin. 
B)  cytoplasmic organelles. 
C)  DNA particles. 
D)  nucleoli. 
E)  a DNA wrap.

Question 2

The organelle that protects cells from the damaging effects of medications and toxins is the

Accepted Answer

A)  ribosome. 
B)  microtubule. 
C)  secretory vesicle. 
D)  smooth endoplasmic reticulum. 
E)  mitochondria. 
A)  ribosome. 
B)  microtubule. 
C)  secretory vesicle. 
D)  smooth endoplasmic reticulum. 
E)  mitochondria.

Question 3

Osmosis is the diffusion of _____ across a selectively permeable membrane.

Accepted Answer

A)  urea 
B)  oxygen 
C)  water 
D)  sodium 
E)  sugar 
A)  urea 
B)  oxygen 
C)  water 
D)  sodium 
E)  sugar

Question 4

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "A"?

Accepted Answer

A)  directs cellular activities, contains DNA 
B)  contains digestive enzymes 
C)  outer boundary of cell, controls entry and exit of substances 
D)  major site of ATP synthesis when oxygen is available 
E)  site of protein synthesis 
A)  directs cellular activities, contains DNA 
B)  contains digestive enzymes 
C)  outer boundary of cell, controls entry and exit of substances 
D)  major site of ATP synthesis when oxygen is available 
E)  site of protein synthesis

Question 5

The function of the Golgi apparatus is

Accepted Answer

A)  packaging and distribution of proteins and lipids. 
B)  production of microtubules. 
C)  excretion of excess salt. 
D)  DNA replication. 
E)  energy production. 
A)  packaging and distribution of proteins and lipids. 
B)  production of microtubules. 
C)  excretion of excess salt. 
D)  DNA replication. 
E)  energy production.

Question 6

White blood cells engulf foreign particles by means of

Accepted Answer

A)  macrocytosis. 
B)  pinocytosis. 
C)  exocytosis. 
D)  phagocytosis. 
E)  prestocytosis. 
A)  macrocytosis. 
B)  pinocytosis. 
C)  exocytosis. 
D)  phagocytosis. 
E)  prestocytosis.

Question 7

-What structure does "A" represent on the diagram of the plasma membrane?

Accepted Answer

A)  membrane channel protein 
B)  phospholipid bilayer 
C)  internal membrane surface 
D)  peripheral protein 
E)  integral protein 
A)  membrane channel protein 
B)  phospholipid bilayer 
C)  internal membrane surface 
D)  peripheral protein 
E)  integral protein

Question 8

Salt was added to a beaker of distilled water (the water was not stirred). A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

Accepted Answer

A)  the difference in the percentage of salt between the top and bottom samples would increase. 
B)  the percentage of salt in top and bottom samples would be approximately equal. 
C)  the samples would still be 2% and 20% respectively. 
D)  the salt would float to the top. 
E)  None of these choices are correct. 
A)  the difference in the percentage of salt between the top and bottom samples would increase. 
B)  the percentage of salt in top and bottom samples would be approximately equal. 
C)  the samples would still be 2% and 20% respectively. 
D)  the salt would float to the top. 
E)  None of these choices are correct.

Question 9

A toxic drug destroyed the Golgi apparatus. This would affect

Accepted Answer

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

Question 10

Which of the following is CORRECTLY matched with its function?

Accepted Answer

A)  channel proteins - are part of an intercellular communication system 
B)  marker molecules - are primarily steroids 
C)  receptor proteins - attach to ligand molecules 
D)  peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  nongated ion channels - are always closed 
A)  channel proteins - are part of an intercellular communication system 
B)  marker molecules - are primarily steroids 
C)  receptor proteins - attach to ligand molecules 
D)  peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  nongated ion channels - are always closed

Question 11

Endoplasmic reticulum with ribosomes attached to it is called

Accepted Answer

A)  smooth ER. 
B)  dendritic ER. 
C)  nodular ER. 
D)  bumpy ER. 
E)  rough ER. 
A)  smooth ER. 
B)  dendritic ER. 
C)  nodular ER. 
D)  bumpy ER. 
E)  rough ER.

Question 12

The transfer of information from DNA to messenger RNA (mRNA) is known as

Accepted Answer

A)  transduction. 
B)  translocation. 
C)  translation. 
D)  transcription. 
E)  transmutation. 
A)  transduction. 
B)  translocation. 
C)  translation. 
D)  transcription. 
E)  transmutation.

Question 13

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

Accepted Answer

A)  directs cellular activities, contains DNA 
B)  contains digestive enzymes 
C)  outer boundary of cell, controls entry and exit of substances 
D)  major site of ATP synthesis when oxygen is available 
E)  site of protein synthesis 
A)  directs cellular activities, contains DNA 
B)  contains digestive enzymes 
C)  outer boundary of cell, controls entry and exit of substances 
D)  major site of ATP synthesis when oxygen is available 
E)  site of protein synthesis

Question 14

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

Accepted Answer

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

Question 15

The movement of a substance from an area of high concentration to an area of less concentration is called

Accepted Answer

A)  active transport. 
B)  diffusion. 
C)  endocytosis. 
D)  facilitated diffusion. 
E)  osmosis. 
A)  active transport. 
B)  diffusion. 
C)  endocytosis. 
D)  facilitated diffusion. 
E)  osmosis.

Question 16

Which of the following is NOT a characteristic function of a cell?

Accepted Answer

A)  reproduction and inheritance 
B)  metabolism and energy use 
C)  movement 
D)  synthesis 
E)  communication 
A)  reproduction and inheritance 
B)  metabolism and energy use 
C)  movement 
D)  synthesis 
E)  communication

Question 17

Which of the following are ciliated cells?

Accepted Answer

A)  columnar cells of upper respiratory tract 
B)  spermatozoa 
C)  columnar cells of small intestines 
D)  red blood cells 
E)  macrophage (large, mobile white blood cell) 
A)  columnar cells of upper respiratory tract 
B)  spermatozoa 
C)  columnar cells of small intestines 
D)  red blood cells 
E)  macrophage (large, mobile white blood cell)

Question 18

If the amino acid coding region of a mRNA molecule is 1800 nucleotides (bases) in length, this molecule will contain _____ codons.

Accepted Answer

A)  400 
B)  600 
C)  800 
D)  900 
E)  1200 
A)  400 
B)  600 
C)  800 
D)  900 
E)  1200

Question 19

According to the most current model of the plasma membrane,

Accepted Answer

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

Question 20

The sodium-potassium pump located in the plasma membrane

Accepted Answer

A)  actively transports potassium into cells. 
B)  osmotically moves sodium into cells. 
C)  actively transports water out of cells. 
D)  moves chlorine out of cells. 
E)  actively transports sodium into cells. 
A)  actively transports potassium into cells. 
B)  osmotically moves sodium into cells. 
C)  actively transports water out of cells. 
D)  moves chlorine out of cells. 
E)  actively transports sodium into cells.

Exam 3: Cell Biology

In the nucleus, DNA is wrapped with proteins. This complex is called

The organelle that protects cells from the damaging effects of medications and toxins is the

Osmosis is the diffusion of _____ across a selectively permeable membrane.

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "A"?

The function of the Golgi apparatus is

White blood cells engulf foreign particles by means of

-What structure does "A" represent on the diagram of the plasma membrane?

Salt was added to a beaker of distilled water (the water was not stirred). A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

A toxic drug destroyed the Golgi apparatus. This would affect

Which of the following is CORRECTLY matched with its function?

Endoplasmic reticulum with ribosomes attached to it is called

The transfer of information from DNA to messenger RNA (mRNA) is known as

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

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

The movement of a substance from an area of high concentration to an area of less concentration is called

Which of the following is NOT a characteristic function of a cell?

Which of the following are ciliated cells?

If the amino acid coding region of a mRNA molecule is 1800 nucleotides (bases) in length, this molecule will contain _____ codons.

According to the most current model of the plasma membrane,

The sodium-potassium pump located in the plasma membrane

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

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