Question 1

Which type of cell has abundant mitochondria?

Accepted Answer

A)  White blood cell, a phagocyte 
B)  Mucus cell (secretes mucus) 
C)  Liver cells that detoxify hydrogen peroxide 
D)  Cardiac muscle cells (require large amounts of ATP) 
E)  Fibroblast (makes protein fibers) 
A)  White blood cell, a phagocyte 
B)  Mucus cell (secretes mucus) 
C)  Liver cells that detoxify hydrogen peroxide 
D)  Cardiac muscle cells (require large amounts of ATP) 
E)  Fibroblast (makes protein fibers)

Question 2

-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 3

A cell uses centrioles in the process of

Accepted Answer

A)  cell division. 
B)  energy generation. 
C)  protein synthesis. 
D)  RNA replication. 
E)  nuclear centering. 
A)  cell division. 
B)  energy generation. 
C)  protein synthesis. 
D)  RNA replication. 
E)  nuclear centering.

Question 4

The movement of molecules against their concentration gradient 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 5

-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 "C"?

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 6

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 7

Cells that respond to ligands

Accepted Answer

A)  possess receptor sites for specific ligands. 
B)  generally produce the ligands. 
C)  have lysosomes that destroy the ligands. 
D)  are using electrical signals in cellular communication. 
E)  are not functional. 
A)  possess receptor sites for specific ligands. 
B)  generally produce the ligands. 
C)  have lysosomes that destroy the ligands. 
D)  are using electrical signals in cellular communication. 
E)  are not functional.

Question 8

Which of the following pairs of terms is mismatched?

Accepted Answer

A)  Mitochondria - cristae 
B)  Golgi apparatus - cisternae 
C)  Lysosomes - hydrolytic enzymes 
D)  Smooth endoplasmic reticulum - chromatin 
E)  Cilia - basal bodies 
A)  Mitochondria - cristae 
B)  Golgi apparatus - cisternae 
C)  Lysosomes - hydrolytic enzymes 
D)  Smooth endoplasmic reticulum - chromatin 
E)  Cilia - basal bodies

Question 9

Which mature cells do not have a nucleus?

Accepted Answer

A)  Columnar cells of upper respiratory tract 
B)  Sperm cells 
C)  Columnar cells of small intestines 
D)  Red blood cells 
E)  Macrophages (large, mobile white blood cells) 
A)  Columnar cells of upper respiratory tract 
B)  Sperm cells 
C)  Columnar cells of small intestines 
D)  Red blood cells 
E)  Macrophages (large, mobile white blood cells)

Question 10

The sequence of nucleotides in a messenger RNA molecule is needed to determine the sequence of

Accepted Answer

A)  nucleotides in a gene. 
B)  amino acids in a protein. 
C)  nucleotides in the anticodons of tRNA. 
D)  codons in DNA. 
E)  amino acids in DNA. 
A)  nucleotides in a gene. 
B)  amino acids in a protein. 
C)  nucleotides in the anticodons of tRNA. 
D)  codons in DNA. 
E)  amino acids in DNA.

Question 11

Determine the sequence of the following events in a cell after exposure of the cell to a chemical signal.
(1) Increased synthesis of a protein
(2) The chemical signal combined with a cytoplasmic receptor
(3) An increase in the nuclear concentration of the chemical
(4) An increase in mRNA synthesis
(5) Genes are activated

Accepted Answer

A)  2, 1, 3, 5, 4 
B)  2, 4, 5, 3, 2 
C)  2, 3, 5, 4, 1 
D)  2, 3, 4, 5, 1 
E)  1, 2, 3, 4, 5 
A)  2, 1, 3, 5, 4 
B)  2, 4, 5, 3, 2 
C)  2, 3, 5, 4, 1 
D)  2, 3, 4, 5, 1 
E)  1, 2, 3, 4, 5

Question 12

Which of the following membrane proteins must be an integral protein to carry out its function?

Accepted Answer

A)  Ion channel 
B)  Receptor protein 
C)  Enzyme 
D)  Marker molecule 
A)  Ion channel 
B)  Receptor protein 
C)  Enzyme 
D)  Marker molecule

Question 13

Cytoplasm is found

Accepted Answer

A)  in the nucleus. 
B)  outside the nucleus but inside the plasma membrane. 
C)  in the cisternae of the endoplasmic reticulum. 
D)  on the cristae of the mitochondria. 
E)  between the phospholipids in the plasma membrane. 
A)  in the nucleus. 
B)  outside the nucleus but inside the plasma membrane. 
C)  in the cisternae of the endoplasmic reticulum. 
D)  on the cristae of the mitochondria. 
E)  between the phospholipids in the plasma membrane.

Question 14

An abnormal cell appears to generate too many proteins, many of which are not necessary, except in the early stages of the cell's life cycle. Which structures are most likely not functioning properly in this cell?

Accepted Answer

A)  Proteosomes 
B)  Peroxisomes 
C)  Mitochondria 
D)  Centrioles 
A)  Proteosomes 
B)  Peroxisomes 
C)  Mitochondria 
D)  Centrioles

Question 15

Mitochondria

Accepted Answer

A)  contains DNA. 
B)  have inner and outer membranes. 
C)  have inner folds called cristae. 
D)  are the cell's power plants. 
E)  All of the choices are correct. 
A)  contains DNA. 
B)  have inner and outer membranes. 
C)  have inner folds called cristae. 
D)  are the cell's power plants. 
E)  All of the choices are correct.

Question 16

A symporter will transport ________ across the plasma membrane.

Accepted Answer

A)  two different ions or molecules in opposite directions 
B)  two different ions or molecules in the same direction 
C)  two of the same ions or molecules in the same direction 
D)  one specific ion or molecule 
E)  two of the same ions or molecules in opposite directions 
A)  two different ions or molecules in opposite directions 
B)  two different ions or molecules in the same direction 
C)  two of the same ions or molecules in the same direction 
D)  one specific ion or molecule 
E)  two of the same ions or molecules in opposite directions

Question 17

Communication between cells occurs when chemical messengers from one cell bind to ________ on another cell.

Accepted Answer

A)  channel proteins 
B)  receptor proteins 
C)  marker molecules 
D)  second messengers 
E)  integrins 
A)  channel proteins 
B)  receptor proteins 
C)  marker molecules 
D)  second messengers 
E)  integrins

Question 18

The cytoskeleton consists of

Accepted Answer

A)  lipochromes, microfilaments, and microtubules. 
B)  actin filaments, mitochondria, and intermediate filaments. 
C)  microfilaments, mitochondria, and lipochromes. 
D)  microtubules, actin filaments, and intermediate filaments. 
E)  ribosomes, the nucleus, and the Golgi apparatus. 
A)  lipochromes, microfilaments, and microtubules. 
B)  actin filaments, mitochondria, and intermediate filaments. 
C)  microfilaments, mitochondria, and lipochromes. 
D)  microtubules, actin filaments, and intermediate filaments. 
E)  ribosomes, the nucleus, and the Golgi apparatus.

Question 19

Vitamin A, a fat-soluble vitamin, would move across the plasma membrane into the cell

Accepted Answer

A)  in vesicles. 
B)  through vitamin membrane channels. 
C)  by dissolving in the lipid bilayer. 
D)  by transport with carrier molecules. 
E)  by active transport. 
A)  in vesicles. 
B)  through vitamin membrane channels. 
C)  by dissolving in the lipid bilayer. 
D)  by transport with carrier molecules. 
E)  by active transport.

Question 20

Which organelle packages materials for secretion from the cell?

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 type of cell has abundant mitochondria?

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

A cell uses centrioles in the process of

The movement of molecules against their concentration gradient is called ________.

-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 "C"?

According to the most current model of the plasma membrane,

Cells that respond to ligands

Which of the following pairs of terms is mismatched?

Which mature cells do not have a nucleus?

The sequence of nucleotides in a messenger RNA molecule is needed to determine the sequence of

Which of the following membrane proteins must be an integral protein to carry out its function?

Cytoplasm is found

An abnormal cell appears to generate too many proteins, many of which are not necessary, except in the early stages of the cell's life cycle. Which structures are most likely not functioning properly in this cell?

Mitochondria

A symporter will transport ________ across the plasma membrane.

Communication between cells occurs when chemical messengers from one cell bind to ________ on another cell.

The cytoskeleton consists of

Vitamin A, a fat-soluble vitamin, would move across the plasma membrane into the cell

Which organelle packages materials for secretion from the cell?

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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