Question 1

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) F) A) and B)
G) A) and C)

Question 2

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 moleculeE) C) and D)
F) A) and B)

Question 3

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.F) A) and B)
G) A) and C)

Question 4

Which organelle packages materials for secretion from the cell?

Accepted Answer

A)   Endoplasmic reticulum
B)   Golgi apparatus
C)   Nucleolus
D)   Peroxisomes
E)   FlagellumF) A) and B)
G) B) and E)

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 synthesisF) D) and E)
G) B) and C)

Question 6

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.F) None of the above
G) B) and E)

Question 7

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, 5F) All of the above
G) A) and C)

Question 8

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.F) B) and E)
G) B) and D)

Question 9

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

Accepted Answer

A)   active transport
B)   diffusion
C)   endocytosis
D)   facilitated diffusion
E)   osmosisF) A) and B)
G) B) and C)

Question 10

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.F) A) and D)
G) None of the above

Question 11

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)   integrinsF) C) and D)
G) B) and D)

Question 12

-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 proteinF) B) and C)
G) B) and D)

Question 13

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.F) A) and B)
G) All of the above

Question 14

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) F) All of the above
G) B) and E)

Question 15

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.F) C) and D)
G) A) and C)

Question 16

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 bodiesF) C) and E)
G) C) and D)

Question 17

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.F) All of the above
G) A) and C)

Question 18

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 directionsF) C) and D)
G) A) and B)

Question 19

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.F) A) and E)
G) A) and C)

Question 20

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)   CentriolesE) None of the above
F) A) and C)

Exam 3: Cell Biology

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?

Correct Answer
verified

Mitochondria

Correct Answer
verified

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

Correct Answer
verified

A cell uses centrioles in the process of

Correct Answer
verified

Which type of cell has abundant mitochondria?

Correct Answer
verified

A symporter will transport ________ across the plasma membrane.

Correct Answer
verified

According to the most current model of the plasma membrane,

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

The cytoskeleton consists of

Correct Answer
verified

-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"?

Correct Answer
verified

Which mature cells do not have a nucleus?

Correct Answer
verified

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

Correct Answer
verified

Cytoplasm is found

Correct Answer
verified

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

Correct Answer
verified

Cells that respond to ligands

Correct Answer
verified

Which of the following pairs of terms is mismatched?

Correct Answer
verified

Which organelle packages materials for secretion from the cell?

Correct Answer
verified

Exam 3: Cell Biology

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?

Correct AnswerverifiedShow Answer

Mitochondria

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A cell uses centrioles in the process of

Correct AnswerverifiedShow Answer

Which type of cell has abundant mitochondria?

Correct AnswerverifiedShow Answer

A symporter will transport ________ across the plasma membrane.

Correct AnswerverifiedShow Answer

According to the most current model of the plasma membrane,

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The cytoskeleton consists of

Correct AnswerverifiedShow Answer

-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"?

Correct AnswerverifiedShow Answer

Which mature cells do not have a nucleus?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cytoplasm is found

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cells that respond to ligands

Correct AnswerverifiedShow Answer

Which of the following pairs of terms is mismatched?

Correct AnswerverifiedShow Answer

Which organelle packages materials for secretion from the cell?

Correct AnswerverifiedShow Answer

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