Question 1

Which of the following events occurs during anaphase?

Accepted Answer

A)  Chromatin strands condense to form chromosomes. 
B)  Chromosomes migrate to opposite poles of the cell. 
C)  Spindle fibers are formed. 
D)  The nuclear envelope degenerates. 
E)  Cytokinesis completes. 
A)  Chromatin strands condense to form chromosomes. 
B)  Chromosomes migrate to opposite poles of the cell. 
C)  Spindle fibers are formed. 
D)  The nuclear envelope degenerates. 
E)  Cytokinesis completes.

Question 2

All triplets required to code for synthesis of a protein are a ________.

Accepted Answer

A)  pre-mRNA 
B)  proenzyme 
C)  gene 
D)  ribosomal RNA (rRN
A)  
E)  codon 
A)  pre-mRNA 
B)  proenzyme 
C)  gene 
D)  ribosomal RNA (rRN
A)  
E)  codon

Question 3

Transcription

Accepted Answer

A)  requires three types of RNA. 
B)  synthesizes RNA from DNA. 
C)  occurs at the ribosomes. 
D)  copies information from mRNA to tRNA. 
E)  synthesizes DNA from RNA. 
A)  requires three types of RNA. 
B)  synthesizes RNA from DNA. 
C)  occurs at the ribosomes. 
D)  copies information from mRNA to tRNA. 
E)  synthesizes DNA from RNA.

Question 4

Plasma membrane phospholipids

Accepted Answer

A)  have polar (charged) tails. 
B)  are arranged in a single layer. 
C)  have tails that face the exterior of the membrane. 
D)  are 95% cholesterol. 
E)  have a hydrophilic head and hydrophobic tails. 
A)  have polar (charged) tails. 
B)  are arranged in a single layer. 
C)  have tails that face the exterior of the membrane. 
D)  are 95% cholesterol. 
E)  have a hydrophilic head and hydrophobic tails.

Question 5

If a 0.9% NaCl (saline) solution is isotonic to a cell, then a solution of 3.5% NaCl would be

Accepted Answer

A)  hypertonic to the cell. 
B)  isotonic to the cell. 
C)  hypotonic to the cell. 
D)  catatonic to the cell. 
E)  All of the choices are correct. 
A)  hypertonic to the cell. 
B)  isotonic to the cell. 
C)  hypotonic to the cell. 
D)  catatonic to the cell. 
E)  All of the choices are correct.

Question 6

-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 "D"?

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 7

Plasma membrane phospholipids

Accepted Answer

A)  have nonpolar fatty acid tails. 
B)  form a bilayer. 
C)  have polar phosphate heads. 
D)  create a selectively permeable barrier. 
E)  All of the choices are correct. 
A)  have nonpolar fatty acid tails. 
B)  form a bilayer. 
C)  have polar phosphate heads. 
D)  create a selectively permeable barrier. 
E)  All of the choices are correct.

Question 8

In one form of endocytosis a molecule binds to a specific protein on the cell surface and triggers vesicle formation and endocytosis. What type of transport is this?

Accepted Answer

A)  Receptor-mediated endocytosis 
B)  Pinocytosis 
C)  Facilitated diffusion 
D)  Active exocytosis 
A)  Receptor-mediated endocytosis 
B)  Pinocytosis 
C)  Facilitated diffusion 
D)  Active exocytosis

Question 9

Which of the following could be used to study general features of cells?

Accepted Answer

A)  A magnifying glass 
B)  Scanning electron microscope 
C)  Transmission electron microscope 
D)  Binoculars 
E)  Light microscope 
A)  A magnifying glass 
B)  Scanning electron microscope 
C)  Transmission electron microscope 
D)  Binoculars 
E)  Light microscope

Question 10

As cell division begins, DNA in the nucleus condenses to form ________.

Accepted Answer

A)  RNA 
B)  cytosol 
C)  genes 
D)  chromosomes 
E)  chromatin 
A)  RNA 
B)  cytosol 
C)  genes 
D)  chromosomes 
E)  chromatin

Question 11

-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 12

Which type of attachment proteins attach cells to extracellular molecules?

Accepted Answer

A)  Ligands 
B)  Integrins 
C)  Adherins 
D)  Cadherins 
A)  Ligands 
B)  Integrins 
C)  Adherins 
D)  Cadherins

Question 13

The leading strand of DNA is formed as

Accepted Answer

A)  short segments called Okazaki fragments. 
B)  a continuous strand, adding to the 3´ end. 
C)  a continuous strand, adding to the 5´ end. 
D)  a template. 
E)  soon as the lagging strand is formed. 
A)  short segments called Okazaki fragments. 
B)  a continuous strand, adding to the 3´ end. 
C)  a continuous strand, adding to the 5´ end. 
D)  a template. 
E)  soon as the lagging strand is formed.

Question 14

In the process of diffusion, net movement of substances is always from a region

Accepted Answer

A)  outside the cell to a region inside the cell. 
B)  inside the cell to a region outside the cell. 
C)  of lower concentration to a region of higher concentration. 
D)  of higher concentration to a region of lower concentration. 
E)  None of the choices are correct. 
A)  outside the cell to a region inside the cell. 
B)  inside the cell to a region outside the cell. 
C)  of lower concentration to a region of higher concentration. 
D)  of higher concentration to a region of lower concentration. 
E)  None of the choices are correct.

Question 15

Which organelle produces most of the cell's energy?

Accepted Answer

A)  Nucleus 
B)  Ribosome 
C)  Lysosome 
D)  Mitochondrion 
E)  Centriole 
A)  Nucleus 
B)  Ribosome 
C)  Lysosome 
D)  Mitochondrion 
E)  Centriole

Question 16

Which type of membrane proteins can catalyze chemical reactions on the inner or outer surfaces of the plasma membrane?

Accepted Answer

A)  Marker molecules 
B)  Channel protein 
C)  Receptor proteins 
D)  Enzymes 
E)  Carrier proteins 
A)  Marker molecules 
B)  Channel protein 
C)  Receptor proteins 
D)  Enzymes 
E)  Carrier proteins

Question 17

Which organelle's function would be most affected if a cell was not able to carry out exocytosis?

Accepted Answer

A)  Secretory vesicle 
B)  Lysosome 
C)  Proteosome 
D)  Peroxisome 
A)  Secretory vesicle 
B)  Lysosome 
C)  Proteosome 
D)  Peroxisome

Question 18

Communication between cells is essential to coordinate the activity of the trillions of cells that make up the human body. Which of the following is/are directly involved in carrying out communication between cells?

Accepted Answer

A)  Lipid bilayer of the plasma membrane 
B)  Receptor proteins of the plasma membrane 
C)  Chemical signal molecules released by cells 
D)  Mitochondria 
E)  Both "Receptor proteins of the plasma membrane" and "Chemical signal molecules released by cells" are correct. 
A)  Lipid bilayer of the plasma membrane 
B)  Receptor proteins of the plasma membrane 
C)  Chemical signal molecules released by cells 
D)  Mitochondria 
E)  Both "Receptor proteins of the plasma membrane" and "Chemical signal molecules released by cells" are correct.

Question 19

Which term describes a small generic membrane-bound structure that transports substances to the plasma membrane for release by exocytosis?

Accepted Answer

A)  Secretory vesicle 
B)  Centrosome 
C)  Chromatid 
D)  Proteosome granule 
E)  Organelle 
A)  Secretory vesicle 
B)  Centrosome 
C)  Chromatid 
D)  Proteosome granule 
E)  Organelle

Question 20

Which of the following is an organelle of locomotion?

Accepted Answer

A)  Endoplasmic reticulum 
B)  Golgi apparatus 
C)  Nucleolus 
D)  Peroxisomes 
E)  Flagellum 
A)  Endoplasmic reticulum 
B)  Golgi apparatus 
C)  Nucleolus 
D)  Peroxisomes 
E)  Flagellum

Exam 3: Cell Biology

Which of the following events occurs during anaphase?

All triplets required to code for synthesis of a protein are a ________.

Transcription

Plasma membrane phospholipids

If a 0.9% NaCl (saline) solution is isotonic to a cell, then a solution of 3.5% NaCl would be

-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 "D"?

Plasma membrane phospholipids

In one form of endocytosis a molecule binds to a specific protein on the cell surface and triggers vesicle formation and endocytosis. What type of transport is this?

Which of the following could be used to study general features of cells?

As cell division begins, DNA in the nucleus condenses to form ________.

-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"?

Which type of attachment proteins attach cells to extracellular molecules?

The leading strand of DNA is formed as

In the process of diffusion, net movement of substances is always from a region

Which organelle produces most of the cell's energy?

Which type of membrane proteins can catalyze chemical reactions on the inner or outer surfaces of the plasma membrane?

Which organelle's function would be most affected if a cell was not able to carry out exocytosis?

Communication between cells is essential to coordinate the activity of the trillions of cells that make up the human body. Which of the following is/are directly involved in carrying out communication between cells?

Which term describes a small generic membrane-bound structure that transports substances to the plasma membrane for release by exocytosis?

Which of the following is an organelle of locomotion?

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

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