Question 1

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. 
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.

Question 2

Which molecule determines the fluidity of the plasma membrane?

Accepted Answer

A)  Protein 
B)  Cholesterol 
C)  Phospholipid 
A)  Protein 
B)  Cholesterol 
C)  Phospholipid

Question 3

The lower limit of resolution of a light microscope is

Accepted Answer

A)  1.0$\mu$m 
B)  0.01$\mu$m 
C)  100$\mu$m 
D)  0.1$\mu$m 
E)  10$\mu$m 
A)  1.0$\mu$m 
B)  0.01$\mu$m 
C)  100$\mu$m 
D)  0.1$\mu$m 
E)  10$\mu$m

Question 4

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)  enzymes 
A)  marker molecules 
B)  receptor proteins 
C)  channel protein 
D)  carrier proteins 
E)  enzymes

Question 5

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

Question 6

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. 
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.

Question 7

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

Question 8

In _______, ions or molecules move in opposite directions.

Accepted Answer

A)  uniport 
B)  ionport 
C)  antiport 
D)  symport 
E)  comport 
A)  uniport 
B)  ionport 
C)  antiport 
D)  symport 
E)  comport

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

Question 10

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

Question 11

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) 
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)

Question 12

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

Question 13

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

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 transport 
A)  mediated transport 
B)  passive transport 
C)  active transport

Question 15

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. 
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.

Question 16

Glycolipids would contain both lipids and

Accepted Answer

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

Question 17

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

Question 18

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. 
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.

Question 19

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. 
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.

Question 20

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

Exam 3: Cell Biology

Endocytosis

Which molecule determines the fluidity of the plasma membrane?

The lower limit of resolution of a light microscope is

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

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

What is membrane potential?

A toxic drug destroyed the Golgi apparatus. This would affect

In _______, ions or molecules move in opposite directions.

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

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

What type of cell has abundant mitochondria?

At the base of each cilium is a structure called the

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

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

Messenger RNA

Glycolipids would contain both lipids and

The function of the Golgi apparatus is

According to the most current model of the plasma membrane,

The cytoskeleton consists of

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

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, Electrolyte, and Acid-Based Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters