Question 1

The fluid-mosaic model of the plasma membrane suggests that

Accepted Answer

A)  cholesterol forms the outermost layer of the membrane. 
B)  proteins form a "liquid" sea in the membrane. 
C)  phospholipids form a single lipid layer in the center of the membrane. 
D)  the membrane is neither rigid nor static in structure. 
E)  proteins are not a part of the membrane. 
A)  cholesterol forms the outermost layer of the membrane. 
B)  proteins form a "liquid" sea in the membrane. 
C)  phospholipids form a single lipid layer in the center of the membrane. 
D)  the membrane is neither rigid nor static in structure. 
E)  proteins are not a part of the membrane.

Question 2

Which of the following is NOT posttranslational processing?

Accepted Answer

A)  Adding polysaccharide side chains to proteins 
B)  Joining 2 or more amino acid chains 
C)  Conversion of a pro-protein to a functional protein 
D)  Removal of introns from pre-mRNA 
E)  Conversion of a pro-enzyme to a functional enzyme 
A)  Adding polysaccharide side chains to proteins 
B)  Joining 2 or more amino acid chains 
C)  Conversion of a pro-protein to a functional protein 
D)  Removal of introns from pre-mRNA 
E)  Conversion of a pro-enzyme to a functional enzyme

Question 3

Molecules that serve as chemical signals to open or close gated ion channels are ________.

Accepted Answer

A)  isotopes 
B)  ligands 
C)  responders 
D)  communicators 
E)  membrane potentials 
A)  isotopes 
B)  ligands 
C)  responders 
D)  communicators 
E)  membrane potentials

Question 4

Which of the following would increase the rate of mediated transport?

Accepted Answer

A)  Increase the number of available carrier molecules 
B)  Change the shape of the binding site on the carrier molecule 
C)  Increase the number of competitive molecules 
D)  Fill all binding sites on carrier molecules 
E)  Remove the binding site on the carrier molecule 
A)  Increase the number of available carrier molecules 
B)  Change the shape of the binding site on the carrier molecule 
C)  Increase the number of competitive molecules 
D)  Fill all binding sites on carrier molecules 
E)  Remove the binding site on the carrier molecule

Question 5

When a person trains for running long distances, which of the following organelles increase in number in his/her muscles?

Accepted Answer

A)  Rough endoplasmic reticulum 
B)  Enzymes for glycolysis 
C)  Basal bodies 
D)  Lysosomes 
E)  Mitochondria 
A)  Rough endoplasmic reticulum 
B)  Enzymes for glycolysis 
C)  Basal bodies 
D)  Lysosomes 
E)  Mitochondria

Question 6

Cytokinesis is completed at the end of this phase.

Accepted Answer

A)  Interphase 
B)  Prophase 
C)  Metaphase 
D)  Anaphase 
E)  Telophase 
A)  Interphase 
B)  Prophase 
C)  Metaphase 
D)  Anaphase 
E)  Telophase

Question 7

Which of the following correctly matches a nuclear structure with its function?

Accepted Answer

A)  Chromosomes - contains RNA and histones 
B)  Nuclear envelope - contains the nucleolar organizer 
C)  Nuclear pores - allow molecules to move between the nucleus and cytoplasm 
D)  Chromatin - fluid portion of the nucleus 
E)  Nucleolus - DNA synthesis 
A)  Chromosomes - contains RNA and histones 
B)  Nuclear envelope - contains the nucleolar organizer 
C)  Nuclear pores - allow molecules to move between the nucleus and cytoplasm 
D)  Chromatin - fluid portion of the nucleus 
E)  Nucleolus - DNA synthesis

Question 8

Protein A is composed of 312 amino acids. Based on this information, which of the following statements is correct?

Accepted Answer

A)  The gene coding for Protein A is composed of at least 936 DNA nucleotides. 
B)  The mRNA coding for Protein A is composed of at least 936 DNA nucleotides. 
C)  The gene coding for Protein A is composed of at least 316 RNA nucleotides. 
D)  Both "The gene coding for Protein A is composed of at least 936 DNA nucleotides" and "The mRNA coding for Protein A is composed of at least 936 DNA nucleotides" are correct. 
A)  The gene coding for Protein A is composed of at least 936 DNA nucleotides. 
B)  The mRNA coding for Protein A is composed of at least 936 DNA nucleotides. 
C)  The gene coding for Protein A is composed of at least 316 RNA nucleotides. 
D)  Both "The gene coding for Protein A is composed of at least 936 DNA nucleotides" and "The mRNA coding for Protein A is composed of at least 936 DNA nucleotides" are correct.

Question 9

-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 10

Arrange the following in correct sequence:
(1) Protein moves through ER and then carried in vesicles to Golgi apparatus
(2) Vesicle pinches off from the Golgi apparatus and carries product to plasma membrane
(3) Golgi apparatus modifies protein and then packages them into vesicles
(4) Protein made by ribosomes on rough ER

Accepted Answer

A)  1, 2, 3, 4 
B)  4, 1, 3, 2 
C)  2, 3, 1, 4 
D)  3, 2, 4, 1 
E)  4, 3, 2, 1 
A)  1, 2, 3, 4 
B)  4, 1, 3, 2 
C)  2, 3, 1, 4 
D)  3, 2, 4, 1 
E)  4, 3, 2, 1

The fluid-mosaic model of the plasma membrane suggests that

Which of the following is NOT posttranslational processing?

Molecules that serve as chemical signals to open or close gated ion channels are ________.

Which of the following would increase the rate of mediated transport?

When a person trains for running long distances, which of the following organelles increase in number in his/her muscles?

Cytokinesis is completed at the end of this phase.

Which of the following correctly matches a nuclear structure with its function?

Protein A is composed of 312 amino acids. Based on this information, which of the following statements is correct?

-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 Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joint 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, Electrolyte, and Acid-Base Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

Exam 3: Cell Biology

The fluid-mosaic model of the plasma membrane suggests that

Which of the following is NOT posttranslational processing?

Molecules that serve as chemical signals to open or close gated ion channels are ________.

Which of the following would increase the rate of mediated transport?

When a person trains for running long distances, which of the following organelles increase in number in his/her muscles?

Cytokinesis is completed at the end of this phase.

Which of the following correctly matches a nuclear structure with its function?

Protein A is composed of 312 amino acids. Based on this information, which of the following statements is correct?

-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 Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joint 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, Electrolyte, and Acid-Base Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters