Question 1

In a plant cell, DNA may be found

Accepted Answer

A)   only in the nucleus.
B)   only in the nucleus and mitochondria.
C)   only in the nucleus and chloroplasts.
D)   in the nucleus, mitochondria, and chloroplasts.
E)   in the nucleus, mitochondria, chloroplasts, and peroxisomes.

Question 2

ECM proteins are made by ribosomes in which part of a eukaryotic cell?

Accepted Answer

A)   mitochondria
B)   cytoplasm
C)   nuclear envelope
D)   Golgi apparatus
E)   rough ER

Question 3

The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures?

Accepted Answer

A)   They must block water and small molecules in order to regulate the exchange of matter and energy with their environment.
B)   They must permit information transfer between the cell's cytoplasm and the nucleus.
C)   They must provide a rigid structure that maintains an appropriate ratio of cell surface area to volume.
D)   They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell.
E)   They are composed of a mixture of lipids and carbohydrates.

Question 4

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

Accepted Answer

A)   lipids
B)   glycogen
C)   proteins
D)   cellulose
E)   nucleic acids

Question 5

Which of the following is present in a prokaryotic cell?

Accepted Answer

A)   mitochondrion
B)   ribosome
C)   nuclear envelope
D)   chloroplast
E)   ER

Question 6

Which of the following produces and modifies polysaccharides that will be secreted?

Accepted Answer

A)   lysosome
B)   vacuole
C)   mitochondrion
D)   Golgi apparatus
E)   peroxisome

Question 7

Which type of organelle is found in plant cells but not in animal cells?

Accepted Answer

A)   ribosomes
B)   mitochondria
C)   nuclei
D)   plastids
E)   none of these

Question 8

One of the key innovations in the evolution of eukaryotes from a prokaryotic ancestor is the endomembrane system. What eukaryotic organelles or features might have evolved as a part of, or as an elaboration of, the endomembrane system?

Accepted Answer

A)   plasma membrane
B)   chloroplasts
C)   mitochondria
D)   nuclear envelope
E)   none of these

Question 9

Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?

Accepted Answer

A)   ribosome
B)   lysosome
C)   smooth endoplasmic reticulum
D)   mitochondrion
E)   contractile vacuole

Question 10

The Golgi apparatus has a polarity or sidedness to its structure and function. Which of the following statements correctly describes this polarity?

Accepted Answer

A)   Transport vesicles fuse with one side of the Golgi and leave from the opposite side.
B)   Proteins in the membrane of the Golgi may be sorted and modified as they move from one side of the Golgi to the other.
C)   Lipids in the membrane of the Golgi may be sorted and modified as they move from one side of the Golgi to the other.
D)   Soluble proteins in the cisternae (interior)  of the Golgi may be sorted and modified as they move from one side of the Golgi to the other.
E)   All of the above correctly describe polar characteristics of the Golgi function.

Question 11

Which of the following statements about the cytoskeleton is true?

Accepted Answer

A)   The dynamic aspect of cytoskeletal function is made possible by the assembly and disassembly of a large variety of proteins into complex aggregates.
B)   Microfilaments are structurally rigid and resist compression, whereas microtubules resist tension (stretching) .
C)   Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other.
D)   Chemicals that block the assembly of the cytoskeleton would cause little effect on the cell's response to external signals and stimuli.
E)   Transport vesicles among the membranes of the endomembrane system produce the cytoskeleton.

Question 12

Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through

Accepted Answer

A)   plasmodesmata.
B)   intermediate filaments.
C)   tight junctions.
D)   desmosomes.
E)   gap junctions.

Question 13

The chemical reactions involved in respiration are virtually identical between prokaryotic and eukaryotic cells. In eukaryotic cells, ATP is synthesized primarily on the inner membrane of the mitochondria. In light of the endosymbiont theory for the evolutionary origin of mitochondria, where is most ATP synthesis likely to occur in prokaryotic cells?

Accepted Answer

A)   in the cytoplasm
B)   on the inner mitochondrial membrane
C)   on the endoplasmic reticulum
D)   on the plasma membrane
E)   on the inner nuclear envelope

Question 14

Movement of vesicles within the cell depends on what cellular structures?

Accepted Answer

A)   microtubules and motor proteins
B)   actin filaments and microtubules
C)   actin filaments and ribosomes
D)   centrioles and motor proteins
E)   actin filaments and motor proteins

Question 15

Recent evidence shows that signals from the extracellular matrix (ECM) can regulate the expression of genes in the cell nucleus. A likely mechanism is that

Accepted Answer

A)   mechanical signals of the ECM can alter the cytoskeleton, which can alter intracellular signaling.
B)   intracellular signals might cause changes in the fibronectin binding to the cell surface.
C)   orientation of microtubules to the ECM can change gene activity.
D)   integrins that receive signals from the ECM migrate to the nucleus.
E)   proteoglycans in the ECM undergo endocytosis and produce intracellular signaling molecules.

Question 16

Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. Which of the following hypotheses is most plausible in light of such structural similarities?

Accepted Answer

A)   Cilia and flagella arise from the centrioles.
B)   Loss of basal bodies should lead to loss of all cilia, flagella, and centrioles.
C)   Motor proteins such as dynein must have evolved before any of these four kinds of structure.
D)   Cilia and flagella coevolved in the same ancestral eukaryotic organism.
E)   Natural selection for cell motility repeatedly selected for microtubular arrays in circular patterns in the evolution of each of these structures.

Question 17

Which of the following correctly lists the order in which cellular components will be found in the pellet when homogenized cells are treated with increasingly rapid spins in a centrifuge?

Accepted Answer

A)   ribosomes, nucleus, mitochondria
B)   chloroplasts, ribosomes, vacuoles
C)   nucleus, ribosomes, chloroplasts
D)   vacuoles, ribosomes, nucleus
E)   nucleus, mitochondria, ribosomes

Question 18

Prokaryotes are classified as belonging to two different domains. What are the domains?

Accepted Answer

A)   Bacteria and Eukarya
B)   Bacteria and Archaea
C)   Archaea and Protista
D)   Bacteria and Protista
E)   Bacteria and Fungi

Question 19

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large and complex lipids. Which cellular organelle must be involved in this condition?

Accepted Answer

A)   the endoplasmic reticulum
B)   the Golgi apparatus
C)   the lysosome
D)   mitochondria
E)   membrane-bound ribosomes

Question 20

Which organelle is the primary site of ATP synthesis in eukaryotic cells?

Accepted Answer

A)   lysosome
B)   vacuole
C)   mitochondrion
D)   Golgi apparatus
E)   peroxisome

Exam 6: A Tour of the Cell

Which organelle is the primary site of ATP synthesis in eukaryotic cells?

Correct Answer
verified

Prokaryotes are classified as belonging to two different domains. What are the domains?

Correct Answer
verified

Movement of vesicles within the cell depends on what cellular structures?

Correct Answer
verified

ECM proteins are made by ribosomes in which part of a eukaryotic cell?

Correct Answer
verified

In a plant cell, DNA may be found

Correct Answer
verified

Which of the following produces and modifies polysaccharides that will be secreted?

Correct Answer
verified

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large and complex lipids. Which cellular organelle must be involved in this condition?

Correct Answer
verified

The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures?

Correct Answer
verified

Which of the following is present in a prokaryotic cell?

Correct Answer
verified

Which type of organelle is found in plant cells but not in animal cells?

Correct Answer
verified

Which of the following statements about the cytoskeleton is true?

Correct Answer
verified

Which of the following correctly lists the order in which cellular components will be found in the pellet when homogenized cells are treated with increasingly rapid spins in a centrifuge?

Correct Answer
verified

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

Correct Answer
verified

Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. Which of the following hypotheses is most plausible in light of such structural similarities?

Correct Answer
verified

One of the key innovations in the evolution of eukaryotes from a prokaryotic ancestor is the endomembrane system. What eukaryotic organelles or features might have evolved as a part of, or as an elaboration of, the endomembrane system?

Correct Answer
verified

The Golgi apparatus has a polarity or sidedness to its structure and function. Which of the following statements correctly describes this polarity?

Correct Answer
verified

Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?

Correct Answer
verified

Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through

Correct Answer
verified

Correct Answer
verified

Recent evidence shows that signals from the extracellular matrix (ECM) can regulate the expression of genes in the cell nucleus. A likely mechanism is that

Correct Answer
verified

Exam 6: A Tour of the Cell

Which organelle is the primary site of ATP synthesis in eukaryotic cells?

Correct AnswerverifiedShow Answer

Prokaryotes are classified as belonging to two different domains. What are the domains?

Correct AnswerverifiedShow Answer

Movement of vesicles within the cell depends on what cellular structures?

Correct AnswerverifiedShow Answer

ECM proteins are made by ribosomes in which part of a eukaryotic cell?

Correct AnswerverifiedShow Answer

In a plant cell, DNA may be found

Correct AnswerverifiedShow Answer

Which of the following produces and modifies polysaccharides that will be secreted?

Correct AnswerverifiedShow Answer

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large and complex lipids. Which cellular organelle must be involved in this condition?

Correct AnswerverifiedShow Answer

The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures?

Correct AnswerverifiedShow Answer

Which of the following is present in a prokaryotic cell?

Correct AnswerverifiedShow Answer

Which type of organelle is found in plant cells but not in animal cells?

Correct AnswerverifiedShow Answer

Which of the following statements about the cytoskeleton is true?

Correct AnswerverifiedShow Answer

Which of the following correctly lists the order in which cellular components will be found in the pellet when homogenized cells are treated with increasingly rapid spins in a centrifuge?

Correct AnswerverifiedShow Answer

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

Correct AnswerverifiedShow Answer

Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. Which of the following hypotheses is most plausible in light of such structural similarities?

Correct AnswerverifiedShow Answer

One of the key innovations in the evolution of eukaryotes from a prokaryotic ancestor is the endomembrane system. What eukaryotic organelles or features might have evolved as a part of, or as an elaboration of, the endomembrane system?

Correct AnswerverifiedShow Answer

The Golgi apparatus has a polarity or sidedness to its structure and function. Which of the following statements correctly describes this polarity?

Correct AnswerverifiedShow Answer

Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?

Correct AnswerverifiedShow Answer

Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Recent evidence shows that signals from the extracellular matrix (ECM) can regulate the expression of genes in the cell nucleus. A likely mechanism is that

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified