Question 1

When yeast cells are transferred from anaerobic to aerobic growth conditions, which of these organelles become much more numerous?

Accepted Answer

A)   lysosomes
B)   Golgi apparatus
C)   ribosomes
D)   mitochondriaE) A) and D)
F) B) and C)

Question 2

Actin filaments have polarity. This means that the two ends can be identified due to structural differences. The plus end is the end to which subunits are added more rapidly, or the end of polymerization. Which of the following would enable you to identify the plus end of actin filaments?

Accepted Answer

A)   adding radiolabeled actin subunits to a mixture of actin filaments in which conditions are favorable for polymerization
B)   adding radiolabeled actin subunits to a mixture of actin filaments in which conditions favor depolymerization
C)   determining the ionic charge of the ends of the actin filamentsD) None of the above
E) All of the above

Question 3

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 vacuoleF) A) and C)
G) A) and B)

Question 4

Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from ________.

Accepted Answer

A)   a bacterium
B)   an animal but not a plant
C)   nearly any eukaryotic organism
D)   a plant but not an animal
E)   any kind of prokaryotic organismF) B) and C)
G) D) and E)

Question 5

The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by the ________.

Accepted Answer

A)   interconnection of most intracellular membranes to the nuclear envelope
B)   transportation of membrane lipids among the membranes of the endomembrane system by small membrane vesicles
C)   function of the Golgi apparatus in sorting and directing membrane components
D)   modification of the membrane components once they reach their final destination
E)   synthesis of different lipids and proteins in each of the organelles of the endomembrane systemF) A) and B)
G) A) and C)

Question 6

How is the structure of kinesin related to its function?

Accepted Answer

A)   Kinesin has two intertwined polypeptides that make up the stalk and enable it to contract and shorten.
B)   Kinesin has a tail region that binds to vesicles and two heads that can attach to microtubules.
C)   The kinesin tail has an ATP binding site to fuel its activities.
D)   Kinesin has two heads to attach to the vesicle being moved and a tail region that attaches to microtubules.E) A) and B)
F) B) and C)

Question 7

Cilia and flagella bend because of ________.

Accepted Answer

A)   conformational changes in ATP that thrust microtubules laterally
B)   a motor protein called radial spokes
C)   the quick inward movements of water by osmosis
D)   a motor protein called dyneinE) None of the above
F) A) and B)

Question 8

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

Accepted Answer

A)   lysosome
B)   vacuole
C)   mitochondrion
D)   Golgi apparatus
E)   peroxisomeF) None of the above
G) A) and D)

Question 9

Which structure is the site of the synthesis of proteins that may be exported from the cell?

Accepted Answer

A)   rough ER
B)   lysosomes
C)   plasmodesmata
D)   Golgi vesicles
E)   free cytoplasmic ribosomesF) C) and E)
G) B) and D)

Question 10

Which of the following macromolecules leaves the nucleus of a eukaryotic cell through pores in the nuclear membrane?

Accepted Answer

A)   DNA
B)   amino acids
C)   mRNA
D)   phospholipidsE) A) and C)
F) B) and D)

Question 11

Which of the following correctly matches a component of the cytoskeleton to one of its functions?

Accepted Answer

A)   Microfilaments form the nuclear lamina.
B)   Microtubules help animal cells divide in two.
C)   Microfilaments cause ciliary bending.
D)   Intermediate filaments contribute to cytoplasmic streaming.
E)   Microtubules move chromosomes.F) B) and E)
G) C) and D)

Question 12

What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?

Accepted Answer

A)   ER → Golgi → nucleus
B)   Golgi → ER → lysosome
C)   nucleus → ER → Golgi
D)   ER → Golgi → vesicles that fuse with plasma membrane
E)   ER → lysosomes → vesicles that fuse with plasma membraneF) B) and E)
G) C) and D)

Question 13

Why is the smooth endoplasmic reticulum unable to synthesize proteins?

Accepted Answer

A)   No ribosomes are attached to its surface.
B)   There is no supply of free amino acids that it can easily access.
C)   It stores calcium, which is a known inhibitor of protein synthesis.
D)   It has no DNA to direct synthesis of proteins.E) None of the above
F) A) and D)

Question 14

Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?

Accepted Answer

A)   mitochondria and chloroplasts
B)   membrane proteins of the inner nuclear envelope
C)   free ribosomes and ribosomes attached to the ER
D)   components of the cytoskeleton
E)   cellulose fibers in the cell wallF) D) and E)
G) C) and D)

Question 15

Lysosomes are considered to be part of the endomembrane system because they ________.

Accepted Answer

A)   deposit end-products of digestion in the endoplasmic reticulum
B)   facilitate movement between stacks of the Golgi
C)   are formed from products synthesized by the endoplasmic reticulum and processed by the Golgi
D)   are composed largely of phospholipidsE) B) and C)
F) A) and D)

Question 16

Researchers tried to explain how vesicular transport occurs in cells by attempting to assemble the transport components. They set up microtubular tracks along which vesicles could be transported, and they added vesicles and ATP (because they knew the transport process requires energy) . Yet, when they put everything together, there was no movement or transport of vesicles. What were they missing?

Accepted Answer

A)   an axon
B)   contractile microfilaments
C)   endoplasmic reticulum
D)   motor proteinsE) A) and B)
F) All of the above

Question 17

Which animal cell organelle contains enzymes that transfer hydrogen from various substrates to oxygen?

Accepted Answer

A)   lysosome
B)   vacuole
C)   mitochondrion
D)   Golgi apparatus
E)   peroxisomeF) B) and C)
G) A) and E)

Question 18

Which plant cell organelle contains its own DNA and ribosomes?

Accepted Answer

A)   glyoxysome
B)   vacuole
C)   mitochondrion
D)   Golgi apparatus
E)   peroxisomeF) A) and D)
G) All of the above

Question 19

In a bacterium, we will find DNA in ________.

Accepted Answer

A)   a membrane-enclosed nucleus
B)   mitochondria
C)   the endoplasmic reticulum
D)   the nucleoid
E)   ribosomesF) A) and D)
G) All of the above

Question 20

Thylakoids, DNA, and ribosomes are all components found in ________.

Accepted Answer

A)   vacuoles
B)   chloroplasts
C)   mitochondria
D)   lysosomes
E)   nucleiF) C) and E)
G) C) and D)

Exam 7: Inside the Cell

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

Correct Answer
verified

Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?

Correct Answer
verified

Correct Answer
verified

Which of the following macromolecules leaves the nucleus of a eukaryotic cell through pores in the nuclear membrane?

Correct Answer
verified

Which animal cell organelle contains enzymes that transfer hydrogen from various substrates to oxygen?

Correct Answer
verified

The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by the ________.

Correct Answer
verified

Actin filaments have polarity. This means that the two ends can be identified due to structural differences. The plus end is the end to which subunits are added more rapidly, or the end of polymerization. Which of the following would enable you to identify the plus end of actin filaments?

Correct Answer
verified

Which plant cell organelle contains its own DNA and ribosomes?

Correct Answer
verified

Lysosomes are considered to be part of the endomembrane system because they ________.

Correct Answer
verified

Which of the following correctly matches a component of the cytoskeleton to one of its functions?

Correct Answer
verified

How is the structure of kinesin related to its function?

Correct Answer
verified

Which structure is the site of the synthesis of proteins that may be exported from the cell?

Correct Answer
verified

Cilia and flagella bend because of ________.

Correct Answer
verified

Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from ________.

Correct Answer
verified

In a bacterium, we will find DNA in ________.

Correct Answer
verified

Why is the smooth endoplasmic reticulum unable to synthesize proteins?

Correct Answer
verified

What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?

Correct Answer
verified

Thylakoids, DNA, and ribosomes are all components found in ________.

Correct Answer
verified

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

Correct Answer
verified

When yeast cells are transferred from anaerobic to aerobic growth conditions, which of these organelles become much more numerous?

Correct Answer
verified

Exam 7: Inside the Cell

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

Correct AnswerverifiedShow Answer

Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following macromolecules leaves the nucleus of a eukaryotic cell through pores in the nuclear membrane?

Correct AnswerverifiedShow Answer

Which animal cell organelle contains enzymes that transfer hydrogen from various substrates to oxygen?

Correct AnswerverifiedShow Answer

The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by the ________.

Correct AnswerverifiedShow Answer

Actin filaments have polarity. This means that the two ends can be identified due to structural differences. The plus end is the end to which subunits are added more rapidly, or the end of polymerization. Which of the following would enable you to identify the plus end of actin filaments?

Correct AnswerverifiedShow Answer

Which plant cell organelle contains its own DNA and ribosomes?

Correct AnswerverifiedShow Answer

Lysosomes are considered to be part of the endomembrane system because they ________.

Correct AnswerverifiedShow Answer

Which of the following correctly matches a component of the cytoskeleton to one of its functions?

Correct AnswerverifiedShow Answer

How is the structure of kinesin related to its function?

Correct AnswerverifiedShow Answer

Which structure is the site of the synthesis of proteins that may be exported from the cell?

Correct AnswerverifiedShow Answer

Cilia and flagella bend because of ________.

Correct AnswerverifiedShow Answer

Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from ________.

Correct AnswerverifiedShow Answer

In a bacterium, we will find DNA in ________.

Correct AnswerverifiedShow Answer

Why is the smooth endoplasmic reticulum unable to synthesize proteins?

Correct AnswerverifiedShow Answer

What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?

Correct AnswerverifiedShow Answer

Thylakoids, DNA, and ribosomes are all components found in ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When yeast cells are transferred from anaerobic to aerobic growth conditions, which of these organelles become much more numerous?

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