Question 1

Which of the following membrane transport mechanisms is not directly a passive process?

Accepted Answer

A) diffusion 
B) facilitated diffusion 
C) secondary active transport 
D) osmosis 
E) active transport 
A) diffusion 
B) facilitated diffusion 
C) secondary active transport 
D) osmosis 
E) active transport

Question 2

During digestion,the concentration of hydrogen ions (H+)in the stomach contents increases to many times that in cells lining the stomach.Which transport process could be responsible?

Accepted Answer

A) osmosis 
B) simple diffusion 
C) facilitated diffusion 
D) active transport 
E) exocytosis 
A) osmosis 
B) simple diffusion 
C) facilitated diffusion 
D) active transport 
E) exocytosis

Question 3

What enzymes must be present for DNA replication to proceed normally?

Accepted Answer

A) DNA polymerase and RNA polymerase 
B) mRNA,rRNA,and tRNA 
C) RNA helicase,DNA helicase and DNA polymerase 
D) DNA topoisomerase,RNA polymerase,and RNA ligase 
E) DNA polymerase,DNA ligase,and DNA helicase 
A) DNA polymerase and RNA polymerase 
B) mRNA,rRNA,and tRNA 
C) RNA helicase,DNA helicase and DNA polymerase 
D) DNA topoisomerase,RNA polymerase,and RNA ligase 
E) DNA polymerase,DNA ligase,and DNA helicase

Question 4

Identify factors that influence diffusion rates.

Accepted Answer

Factors that influence diffusi

Question 5

Contrast the effects of a hypotonic solution and a hypertonic solution on a red blood cell.

Accepted Answer

A) The hypotonic solution would not cause a change in the RBC,and the hypertonic solution would cause the RBC to swell and it may burst (hemolysis). 
B) The hypotonic solution would not cause a change in the RBC,and the hypertonic solution would cause the RBC to shrink (crenation). 
C) The hypotonic solution would cause the RBC to shrink (crenation),and the hypertonic solution would cause the RBC to swell and it may burst (hemolysis). 
D) The hypotonic solution would cause the RBC to swell and it may burst (hemolysis),and the hypertonic solution would cause the RBC to shrink (crenation). 
E) The hypotonic solution would cause the RBC to swell and it may burst (hemolysis),and the hypertonic solution would not cause a change in the RBC. 
A) The hypotonic solution would not cause a change in the RBC,and the hypertonic solution would cause the RBC to swell and it may burst (hemolysis). 
B) The hypotonic solution would not cause a change in the RBC,and the hypertonic solution would cause the RBC to shrink (crenation). 
C) The hypotonic solution would cause the RBC to shrink (crenation),and the hypertonic solution would cause the RBC to swell and it may burst (hemolysis). 
D) The hypotonic solution would cause the RBC to swell and it may burst (hemolysis),and the hypertonic solution would cause the RBC to shrink (crenation). 
E) The hypotonic solution would cause the RBC to swell and it may burst (hemolysis),and the hypertonic solution would not cause a change in the RBC.

Question 6

During the synthesis of proteins,amino acids are assembled in the proper sequence because each tRNA molecule that brings them to the ribosome has a(n)________ that binds to a complementary codon in the mRNA.

Accepted Answer

A) anticodon 
B) codon 
C) amphicodon 
D) complicodon 
E) alticodon 
A) anticodon 
B) codon 
C) amphicodon 
D) complicodon 
E) alticodon

Question 7

Describe the functions of the cytoskeleton.

Accepted Answer

A) produces 95% of the ATP 
B) stores and processes genetic information 
C) increases surface area to facilitate diffusion 
D) strengthens and supports the cells and enables movement of cellular structures and materials 
E) stores,alters,and packages synthesized products 
A) produces 95% of the ATP 
B) stores and processes genetic information 
C) increases surface area to facilitate diffusion 
D) strengthens and supports the cells and enables movement of cellular structures and materials 
E) stores,alters,and packages synthesized products

Question 8

Which cytoskeletal component is common to both centrioles and cilia?

Accepted Answer

A) microfilaments 
B) microtubules 
C) thick filaments 
D) intermediate filaments 
E) thin filaments 
A) microfilaments 
B) microtubules 
C) thick filaments 
D) intermediate filaments 
E) thin filaments

Question 9

Hemolysis may occur when a blood cell is placed into a(n)________ solution.

Accepted Answer

A) isotonic 
B) hypertonic 
C) hypotonic 
D) merotonic 
E) homotonic 
A) isotonic 
B) hypertonic 
C) hypotonic 
D) merotonic 
E) homotonic

Question 10

When a protein-releasing factor recognize a stop codon,the process is called

Accepted Answer

A) elongation. 
B) transcription. 
C) initiation. 
D) termination. 
E) packing. 
A) elongation. 
B) transcription. 
C) initiation. 
D) termination. 
E) packing.

Question 11

Histones are found in

Accepted Answer

A) nucleosomes. 
B) centromeres. 
C) lysosomes. 
D) vesicles. 
E) endosomes. 
A) nucleosomes. 
B) centromeres. 
C) lysosomes. 
D) vesicles. 
E) endosomes.

Question 12

Describe interphase,and identify its stages.

Accepted Answer

Interphase is the portion of a

Question 13

The plasma membrane includes all of the following except

Accepted Answer

A) integral proteins. 
B) glycolipids. 
C) phospholipids. 
D) cholesterol. 
E) peripheral proteins. 
A) integral proteins. 
B) glycolipids. 
C) phospholipids. 
D) cholesterol. 
E) peripheral proteins.

Question 14

Synthesis of lipids and glycogen takes place at the

Accepted Answer

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

Question 15

The total length of DNA within a human cell nucleus is approximately 2 meters.How does the DNA fit into the relatively small space of a human nucleus,which ranges some 6-10μm in diameter?

Accepted Answer

The DNA strands are coiled around histon

Question 16

Specific proteins are manufactured through the interaction of ________ and ________.

Accepted Answer

A) multiple enzymes; three types of RNA 
B) multiple enzymes; two types of RNA 
C) multiple carbohydrates; three types of DNA 
D) multiple proteins; three types of DNA 
E) multiple enzymes; three types of DNA 
A) multiple enzymes; three types of RNA 
B) multiple enzymes; two types of RNA 
C) multiple carbohydrates; three types of DNA 
D) multiple proteins; three types of DNA 
E) multiple enzymes; three types of DNA

Question 17

What is the purpose of motile cilia?

Accepted Answer

A) produce muscle contraction 
B) propel material across the cell surface 
C) propel sperm 
D) move organelles 
E) move materials through cytoplasm 
A) produce muscle contraction 
B) propel material across the cell surface 
C) propel sperm 
D) move organelles 
E) move materials through cytoplasm

Question 18

Define diffusion.

Accepted Answer

A) The passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is achieved. 
B) The passive movement of molecules from an area of lower concentration to an area of higher concentration until equilibrium is achieved. 
C) The active movement of molecules from an area of higher concentration to an area of lower concentration using energy. 
D) The active movement of molecules from an area of lower concentration to an area of higher concentration using energy. 
E) The vesicular transport of large molecules out of a cell. 
A) The passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is achieved. 
B) The passive movement of molecules from an area of lower concentration to an area of higher concentration until equilibrium is achieved. 
C) The active movement of molecules from an area of higher concentration to an area of lower concentration using energy. 
D) The active movement of molecules from an area of lower concentration to an area of higher concentration using energy. 
E) The vesicular transport of large molecules out of a cell.

Question 19

Some white blood cells engulf bacteria and bring them into the cell.What is this process called?

Accepted Answer

A) pinocytosis 
B) exocytosis 
C) phagocytosis 
D) receptor-mediated endocytosis 
E) osmosis 
A) pinocytosis 
B) exocytosis 
C) phagocytosis 
D) receptor-mediated endocytosis 
E) osmosis

Question 20

mRNA is needed to synthesize ________ in the cytoplasm.

Accepted Answer

A) carbohydrates 
B) lipids 
C) proteins 
D) phospholipids 
E) ATP 
A) carbohydrates 
B) lipids 
C) proteins 
D) phospholipids 
E) ATP

Exam 3: Cellular Level of Organization

Which of the following membrane transport mechanisms is not directly a passive process?

During digestion,the concentration of hydrogen ions (H+)in the stomach contents increases to many times that in cells lining the stomach.Which transport process could be responsible?

What enzymes must be present for DNA replication to proceed normally?

Identify factors that influence diffusion rates.

Contrast the effects of a hypotonic solution and a hypertonic solution on a red blood cell.

During the synthesis of proteins,amino acids are assembled in the proper sequence because each tRNA molecule that brings them to the ribosome has a(n)________ that binds to a complementary codon in the mRNA.

Describe the functions of the cytoskeleton.

Which cytoskeletal component is common to both centrioles and cilia?

Hemolysis may occur when a blood cell is placed into a(n)________ solution.

When a protein-releasing factor recognize a stop codon,the process is called

Histones are found in

Describe interphase,and identify its stages.

The plasma membrane includes all of the following except

Synthesis of lipids and glycogen takes place at the

The total length of DNA within a human cell nucleus is approximately 2 meters.How does the DNA fit into the relatively small space of a human nucleus,which ranges some 6-10μm in diameter?

Specific proteins are manufactured through the interaction of ________ and ________.

What is the purpose of motile cilia?

Define diffusion.

Some white blood cells engulf bacteria and bring them into the cell.What is this process called?

mRNA is needed to synthesize ________ in the cytoplasm.

An Introduction to Anatomy and Physiology

Chemical Level of Organization

Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Skeleton

Joints

Skeletal Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain, cranial Nerves, and Sensory and Motor Pathways

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Heart and Cardiovascular Function

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, nutrition, and Energetics

The Urinary System

Fluid,electrolyte,and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters

Specific proteins are manufactured through the interaction of and .