Question 1

Which type of cells below is not known for its extensively developed SER?

Accepted Answer

A) skin cells 
B) kidney tubule cells 
C) skeletal muscle cells 
D) steroid-producing endocrine cells 
E) both skeletal muscle cells and kidney tubule cells 
A) skin cells 
B) kidney tubule cells 
C) skeletal muscle cells 
D) steroid-producing endocrine cells 
E) both skeletal muscle cells and kidney tubule cells

Question 2

Which of the following enzymes are typically found in lysosomes?

Accepted Answer

A) hydrolytic enzymes (acid hydrolases) 
B) oxidoreductases 
C) transferases 
D) lyases 
E) ligases 
A) hydrolytic enzymes (acid hydrolases) 
B) oxidoreductases 
C) transferases 
D) lyases 
E) ligases

Question 3

What acts as an address directing lysosomal enzymes to lysosomes?

Accepted Answer

A) a lysosomal peptide 
B) mannose-6-sulfate residues on the enzyme 
C) mannose-6-phosphate residues on the enzyme 
D) a signal peptide on the enzyme 
E) a stroma transfer peptide on the enzyme 
A) a lysosomal peptide 
B) mannose-6-sulfate residues on the enzyme 
C) mannose-6-phosphate residues on the enzyme 
D) a signal peptide on the enzyme 
E) a stroma transfer peptide on the enzyme

Question 4

The phosphorylated rings of phosphoinositides are recognized and bound by particular proteins.Where are the phosphorylated rings located?

Accepted Answer

A) They reside in the membrane interior. 
B) They are found in lysosomes. 
C) They reside at the membrane surface. 
D) They reside inside the clathrin coat. 
E) They reside inside the COPII-coat. 
A) They reside in the membrane interior. 
B) They are found in lysosomes. 
C) They reside at the membrane surface. 
D) They reside inside the clathrin coat. 
E) They reside inside the COPII-coat.

Question 5

How does UGGT recognize incompletely folded or misfolded proteins that have been recently synthesized?

Accepted Answer

A) Such proteins display exposed hydrophilic residues that are absent from properly folded proteins. 
B) Five histidine residues are exposed on the protein's surface when it is improperly folded. 
C) Such proteins display exposed hydrophobic residues that are absent from properly folded proteins. 
D) Six arginine residues are exposed on the protein's surface when it is improperly folded. 
E) Such proteins display numerous carboxyl groups on their surfaces,which decreases their solubility. 
A) Such proteins display exposed hydrophilic residues that are absent from properly folded proteins. 
B) Five histidine residues are exposed on the protein's surface when it is improperly folded. 
C) Such proteins display exposed hydrophobic residues that are absent from properly folded proteins. 
D) Six arginine residues are exposed on the protein's surface when it is improperly folded. 
E) Such proteins display numerous carboxyl groups on their surfaces,which decreases their solubility.

Question 6

Where are v-SNAREs and t-SNARES found,respectively?

Accepted Answer

A) incorporated into transport vesicle membranes during budding,in target compartment membranes 
B) in target compartment membranes,incorporated into transport vesicle membranes during budding 
C) in target compartment membranes,in target compartment membranes 
D) incorporated into transport vesicle membranes during fusion,in target compartment membranes 
E) in target compartment membranes,incorporated into transport vesicle membranes during fusion 
A) incorporated into transport vesicle membranes during budding,in target compartment membranes 
B) in target compartment membranes,incorporated into transport vesicle membranes during budding 
C) in target compartment membranes,in target compartment membranes 
D) incorporated into transport vesicle membranes during fusion,in target compartment membranes 
E) in target compartment membranes,incorporated into transport vesicle membranes during fusion

Question 7

What process is responsible for organelle turnover in the cell and carries out the regulated destruction of the cell's own organelles for the purpose of recycling the components of which they are made?

Accepted Answer

A) autolysis 
B) autophagolysosome 
C) apoptosis 
D) autophagy 
E) autonomy 
A) autolysis 
B) autophagolysosome 
C) apoptosis 
D) autophagy 
E) autonomy

Question 8

The vesicle containing material taken into the cell by phagocytosis is called a(n)_________.

Accepted Answer

A) phagocytosome 
B) vacuolosome 
C) phagosome 
D) phagolysosome 
E) exosome 
A) phagocytosome 
B) vacuolosome 
C) phagosome 
D) phagolysosome 
E) exosome

Question 9

An infant,who is unable to acquire antibodies properly from his mother's breast milk,is born.Tests determine that he makes receptors for the antibodies and that they efficiently bind the antibodies,yet they are not exactly like normal receptors.What is a possible explanation for the inability to take up the antibodies?

Accepted Answer

It is possible that while the

Question 10

Proteins that are destined to be translocated through the chloroplast envelope into the stroma must have a transit peptide including _______.

Accepted Answer

A) a thylakoid transfer domain 
B) a thylakoid lumen domain 
C) a transit peptidase 
D) a stroma-targeting domain 
E) a matrix-targeting domain 
A) a thylakoid transfer domain 
B) a thylakoid lumen domain 
C) a transit peptidase 
D) a stroma-targeting domain 
E) a matrix-targeting domain

Question 11

A control cell that is synthesizing a GFP-labeled version of mannosidase II has fluorescence localized in the numerous Golgi complexes of the cell.Normally,this enzyme is synthesized in the endoplasmic reticulum and moves via transport vesicles to the Golgi complex,where it takes up residence.If an experimental cell contains an siRNA that leads to the fluorescence being restricted to the endoplasmic reticulum,with what would the siRNA be likely to interfere?

Accepted Answer

A) an mRNA that codes for a protein involved in the transport of the enzyme from the ER to the Golgi complex 
B) an rRNA that synthesizes the enzyme 
C) the synthesis of mannosidase II from its mRNA 
D) an mRNA that codes for a protein involved in the transport of the enzyme from the Golgi complex to the ER 
E) an mRNA that codes for the enzyme 
A) an mRNA that codes for a protein involved in the transport of the enzyme from the ER to the Golgi complex 
B) an rRNA that synthesizes the enzyme 
C) the synthesis of mannosidase II from its mRNA 
D) an mRNA that codes for a protein involved in the transport of the enzyme from the Golgi complex to the ER 
E) an mRNA that codes for the enzyme

Question 12

What appears to be an early step in the process of vesicle fusion to its target compartment?

Accepted Answer

A) swelling of the vesicle 
B) shrinkage of the vesicle 
C) tethering of vesicles to the target compartment by extended,fibrous proteins 
D) a change in charge at the vesicle surface 
E) dissociation of many lipids from the vesicle membrane 
A) swelling of the vesicle 
B) shrinkage of the vesicle 
C) tethering of vesicles to the target compartment by extended,fibrous proteins 
D) a change in charge at the vesicle surface 
E) dissociation of many lipids from the vesicle membrane

Question 13

A cellular phenomenon called _________ is a process in which cells produce small RNAs that bind to specific mRNAs and inhibit the translation of these mRNAs into proteins.

Accepted Answer

A) RNAi 
B) cRNAs 
C) RNAi and RNA interference 
D) RNA interference 
E) RNAa 
A) RNAi 
B) cRNAs 
C) RNAi and RNA interference 
D) RNA interference 
E) RNAa

Question 14

Radioactive phospholipid precursors are exposed to growing cells in a brief pulse.After a chase with nonlabeled phospholipid precursors,it is clear that the label appears first over the endoplasmic reticulum.Some time later,the label appears in the cell membrane after being seen in the Golgi complex and cytoplasmic vesicles.To what conclusion do the data lead you?

Accepted Answer

Membrane lipids appear to be synthesized

Question 15

People with Niemann-Pick type C disease suffer from what defect?

Accepted Answer

A) They lack one of two lysosomal enzymes. 
B) They cannot degrade HDL particles. 
C) They cannot degrade LDL particles. 
D) They lack one of the proteins needed to transport cholesterol out of lysosomes. 
E) Their LDL receptors are nonfunctional. 
A) They lack one of two lysosomal enzymes. 
B) They cannot degrade HDL particles. 
C) They cannot degrade LDL particles. 
D) They lack one of the proteins needed to transport cholesterol out of lysosomes. 
E) Their LDL receptors are nonfunctional.

Question 16

If amoebae are treated with cytochalasin B,an inhibitor of actin polymerization,phagocytosis stops.Why is this so?

Accepted Answer

The process of phagocytosis is

Question 17

What is the name of a cellular phenomenon in which cells produce small RNAs that bind to specific mRNAs and inhibit their translation into proteins? What are the small RNAs that bind to these specific mRNAs called?

Accepted Answer

It is called RNA int

Question 18

The best-studied adaptors that participate in the formation of the coated pits and coated vesicles of clathrin-mediated endocytosis are the _____ adaptors.

Accepted Answer

A) COPII 
B) GGA 
C) AP2 
D) clathrin 
E) COPI 
A) COPII 
B) GGA 
C) AP2 
D) clathrin 
E) COPI

Question 19

Lipid species like the phosphoinositides can have a dynamic regulatory role because _______.

Accepted Answer

A) it can be rapidly formed by enzymes localized at particular places within the cell 
B) it can be rapidly formed by enzymes localized at particular times within the cell 
C) it can be rapidly destroyed by enzymes localized at particular places within the cell 
D) it can be rapidly destroyed by enzymes localized at particular times within the cell 
E) All of these are correct. 
A) it can be rapidly formed by enzymes localized at particular places within the cell 
B) it can be rapidly formed by enzymes localized at particular times within the cell 
C) it can be rapidly destroyed by enzymes localized at particular places within the cell 
D) it can be rapidly destroyed by enzymes localized at particular times within the cell 
E) All of these are correct.

Question 20

What happens to the breakdown products of bacteria brought into mammalian phagocytic cells (like macrophages and neutrophils)from the extracellular environment?

Accepted Answer

A) They are used as nutrients and are released to the extracellular space. 
B) They are used as nutrients and are kept in the lysosome. 
C) Peptides produced during digestion are posted on the phagocytic cell's surface. 
D) They are used to build the nuclear envelope and are released into the cytoplasm. 
E) They are maintained within the lysosome and used for building new lysosomes. 
A) They are used as nutrients and are released to the extracellular space. 
B) They are used as nutrients and are kept in the lysosome. 
C) Peptides produced during digestion are posted on the phagocytic cell's surface. 
D) They are used to build the nuclear envelope and are released into the cytoplasm. 
E) They are maintained within the lysosome and used for building new lysosomes.

Which type of cells below is not known for its extensively developed SER?

Which of the following enzymes are typically found in lysosomes?

What acts as an address directing lysosomal enzymes to lysosomes?

The phosphorylated rings of phosphoinositides are recognized and bound by particular proteins.Where are the phosphorylated rings located?

How does UGGT recognize incompletely folded or misfolded proteins that have been recently synthesized?

Where are v-SNAREs and t-SNARES found,respectively?

What process is responsible for organelle turnover in the cell and carries out the regulated destruction of the cell's own organelles for the purpose of recycling the components of which they are made?

The vesicle containing material taken into the cell by phagocytosis is called a(n)_________.

Proteins that are destined to be translocated through the chloroplast envelope into the stroma must have a transit peptide including _______.

What appears to be an early step in the process of vesicle fusion to its target compartment?

A cellular phenomenon called _________ is a process in which cells produce small RNAs that bind to specific mRNAs and inhibit the translation of these mRNAs into proteins.

People with Niemann-Pick type C disease suffer from what defect?

If amoebae are treated with cytochalasin B,an inhibitor of actin polymerization,phagocytosis stops.Why is this so?

What is the name of a cellular phenomenon in which cells produce small RNAs that bind to specific mRNAs and inhibit their translation into proteins? What are the small RNAs that bind to these specific mRNAs called?

The best-studied adaptors that participate in the formation of the coated pits and coated vesicles of clathrin-mediated endocytosis are the _____ adaptors.

Lipid species like the phosphoinositides can have a dynamic regulatory role because _______.

What happens to the breakdown products of bacteria brought into mammalian phagocytic cells (like macrophages and neutrophils)from the extracellular environment?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics,enzymes and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Exam 8: Cytoplasmic Membrane Systems: Structure, function, and Membrane Trafficking

Which type of cells below is not known for its extensively developed SER?

Which of the following enzymes are typically found in lysosomes?

What acts as an address directing lysosomal enzymes to lysosomes?

The phosphorylated rings of phosphoinositides are recognized and bound by particular proteins.Where are the phosphorylated rings located?

How does UGGT recognize incompletely folded or misfolded proteins that have been recently synthesized?

Where are v-SNAREs and t-SNARES found,respectively?

What process is responsible for organelle turnover in the cell and carries out the regulated destruction of the cell's own organelles for the purpose of recycling the components of which they are made?

The vesicle containing material taken into the cell by phagocytosis is called a(n)_________.

Proteins that are destined to be translocated through the chloroplast envelope into the stroma must have a transit peptide including _______.

What appears to be an early step in the process of vesicle fusion to its target compartment?

A cellular phenomenon called _________ is a process in which cells produce small RNAs that bind to specific mRNAs and inhibit the translation of these mRNAs into proteins.

People with Niemann-Pick type C disease suffer from what defect?

If amoebae are treated with cytochalasin B,an inhibitor of actin polymerization,phagocytosis stops.Why is this so?

What is the name of a cellular phenomenon in which cells produce small RNAs that bind to specific mRNAs and inhibit their translation into proteins? What are the small RNAs that bind to these specific mRNAs called?

The best-studied adaptors that participate in the formation of the coated pits and coated vesicles of clathrin-mediated endocytosis are the _____ adaptors.

Lipid species like the phosphoinositides can have a dynamic regulatory role because _______.

What happens to the breakdown products of bacteria brought into mammalian phagocytic cells (like macrophages and neutrophils)from the extracellular environment?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics,enzymes and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters