Question 1

Coated vesicles known as are thought to potentially be associated with cholesterol uptake and/or have a role in signal transduction.

Accepted Answer

The answer of Coated vesicles known as are thought to...

Question 2

Pharmacogenetics is a new field of study that arose from the study of

Accepted Answer

A) mixed- function oxidases. 
B) residual bodies. 
C) phagocytosis by specifically vertebrate white blood cells. 
D) cholesterol uptake. 
E) ATP- dependent calcium ATPases. 
A) mixed- function oxidases. 
B) residual bodies. 
C) phagocytosis by specifically vertebrate white blood cells. 
D) cholesterol uptake. 
E) ATP- dependent calcium ATPases.

Question 3

During receptor- mediated endocytosis, the ultimate fate of the vesicle and/or its contents include(s)

Accepted Answer

A) recycling of receptors. 
B) transcytosis. 
C) transport to late endosome for digestion. 
D) only B and C 
E) choices A, B, and C 
A) recycling of receptors. 
B) transcytosis. 
C) transport to late endosome for digestion. 
D) only B and C 
E) choices A, B, and C

Question 4

Ribosomes that do not anchor to the surface of the rough endoplasmic reticulum during translation most probably

Accepted Answer

A) have a signal/trafficking error. 
B) do not make the appropriate anchor protein. 
C) are synthesizing cytoplasmic proteins. 
D) have a defect in ribosomal proteins that allow attachment to the ER. 
E) all of the above 
A) have a signal/trafficking error. 
B) do not make the appropriate anchor protein. 
C) are synthesizing cytoplasmic proteins. 
D) have a defect in ribosomal proteins that allow attachment to the ER. 
E) all of the above

Question 5

Using the techniques of genetic engineering, you design a cytoplasmic protein you want to accumulate within the ER of yeast cells. To accomplish this goal, you need to

Accepted Answer

A) incorporate the appropriate DNA sequence with the proper signal. 
B) incorporate the appropriate mannose- 6- phosphate groups. 
C) do nothing; all proteins go through the ER. 
D) incorporate the appropriate lipid groups into the lipoprotein. 
E) incorporate radioactive amino acids into the protein. 
A) incorporate the appropriate DNA sequence with the proper signal. 
B) incorporate the appropriate mannose- 6- phosphate groups. 
C) do nothing; all proteins go through the ER. 
D) incorporate the appropriate lipid groups into the lipoprotein. 
E) incorporate radioactive amino acids into the protein.

Question 6

Distinguish among the following: endocytosis, pinocytosis, and phagocytosis.

Accepted Answer

Endocytosis is a means of bringing mater

Question 7

In plants, peroxisomes associated with nitrogen fixation in legumes can be found in great abundance in

Accepted Answer

A) root nodules. 
B) cotyledons. 
C) leaves. 
D) stems. 
E) phloem and xylem. 
A) root nodules. 
B) cotyledons. 
C) leaves. 
D) stems. 
E) phloem and xylem.

Question 8

The chronic use of the class of drugs can result in decreased effectiveness of antibiotics, anticoagulants, and steroids.

Accepted Answer

The answer of The chronic use of the class of...

Question 9

Of the following cell types, the greatest concentration of high- density lipoprotein (HDLs)would be associated with cells.

Accepted Answer

A) connective tissue 
B) muscle 
C) liver 
D) blood 
E) skin 
A) connective tissue 
B) muscle 
C) liver 
D) blood 
E) skin

Question 10

All of the following are unique to plant cells EXCEPT

Accepted Answer

A) peroxisomes. 
B) glyoxysomes. 
C) chloroplasts. 
D) leaf peroxisomes. 
E) nodule peroxisomes. 
A) peroxisomes. 
B) glyoxysomes. 
C) chloroplasts. 
D) leaf peroxisomes. 
E) nodule peroxisomes.

Question 11

Lysosomal storage diseases are the result of deficiencies in lysosomal proteins. An example of one such disorder is

Accepted Answer

A) chronic fatigue syndrome. 
B) Tay- Sachs disease. 
C) adult- onset diabetes. 
D) tuberculosis. 
E) Huntington's disease. 
A) chronic fatigue syndrome. 
B) Tay- Sachs disease. 
C) adult- onset diabetes. 
D) tuberculosis. 
E) Huntington's disease.

Question 12

If you were looking within a cell for organized clathrin structures, you would find them associated with which of the following structures?

Accepted Answer

A) inner membrane of mitochondria 
B) endoplasmic reticulum 
C) trans Golgi complex 
D) extracellular matrix 
E) lysosomes 
A) inner membrane of mitochondria 
B) endoplasmic reticulum 
C) trans Golgi complex 
D) extracellular matrix 
E) lysosomes

Question 13

A radioactively labeled protein is made by cells and followed through the various organelles in the secretory pathway. After six hours, all of the radioactivity is still primarily in the Golgi apparatus. This suggests that the

Accepted Answer

A) protein does not possess a signal peptide for localization within the lumen of the rough endoplasmic reticulum. 
B) protein possesses a signal for localization within the Golgi apparatus. 
C) secretory vesicles are not fusing with the plasma membrane. 
D) protein was not translated by the ribosomes. 
E) all of the above 
A) protein does not possess a signal peptide for localization within the lumen of the rough endoplasmic reticulum. 
B) protein possesses a signal for localization within the Golgi apparatus. 
C) secretory vesicles are not fusing with the plasma membrane. 
D) protein was not translated by the ribosomes. 
E) all of the above

Question 14

Peroxisomes

Accepted Answer

A) possess amylase activity. 
B) possess acid phosphatase activity. 
C) are not derived from the endoplasmic reticulum. 
D) are bounded by double membranes. 
E) all of the above 
A) possess amylase activity. 
B) possess acid phosphatase activity. 
C) are not derived from the endoplasmic reticulum. 
D) are bounded by double membranes. 
E) all of the above

Question 15

is the molecule associated with receptor- mediated endocytosis that "coats" the vesicle until it is released.

Accepted Answer

The answer of is the molecule associated with receptor- mediated...

Question 16

Exocytosis is stimulated by regional increases in concentration.

Accepted Answer

The answer of Exocytosis is stimulated by regional increases in...

Question 17

You are isolating cell fractions using a variety of centrifuge techniques. You have two very similar fractions, but at this point are unable to discern which fraction is peroxisomes and which is lysosomes. As a result, you need to test the fractions for unique enzyme activities. If you are looking for peroxisomes, one enzyme activity you can test for is

Accepted Answer

A) ATPase. 
B) hexokinase. 
C) cytochrome c oxidase. 
D) glucose- 6- phosphatase. 
E) catalase. 
A) ATPase. 
B) hexokinase. 
C) cytochrome c oxidase. 
D) glucose- 6- phosphatase. 
E) catalase.

Question 18

You want to engineer a yeast cell manufacture and secrete a bacterial protein product. To do this properly, you need to make certain that

Accepted Answer

A) the yeast cell is capable of phagocytosis. 
B) the appropriate signal sequence is present. 
C) plenty of clathrin- coated pits may be formed. 
D) mannose- 6- phosphate is added to the protein. 
E) all of the above 
A) the yeast cell is capable of phagocytosis. 
B) the appropriate signal sequence is present. 
C) plenty of clathrin- coated pits may be formed. 
D) mannose- 6- phosphate is added to the protein. 
E) all of the above

Question 19

The proteins of bacteria were radioactively labeled and fed to phagocytic cells. The proteins within the phagocytic cell became increasingly more radioactive over time. This observation is the result of the activity of

Accepted Answer

A) lysosomes. 
B) the Golgi apparatus. 
C) mitochondria. 
D) peroxisomes. 
E) chloroplasts. 
A) lysosomes. 
B) the Golgi apparatus. 
C) mitochondria. 
D) peroxisomes. 
E) chloroplasts.

Question 20

Regulatory secretion of hormones would be associated with at the trans- face of the Golgi.

Accepted Answer

A) non- clathrin vesicles 
B) lysosomes 
C) clathrin- coated vesicles 
D) microsomes 
E) endosomes 
A) non- clathrin vesicles 
B) lysosomes 
C) clathrin- coated vesicles 
D) microsomes 
E) endosomes

Exam 12: The Endomembrane System and Peroxisomes

Coated vesicles known as are thought to potentially be associated with cholesterol uptake and/or have a role in signal transduction.

Pharmacogenetics is a new field of study that arose from the study of

During receptor- mediated endocytosis, the ultimate fate of the vesicle and/or its contents include(s)

Ribosomes that do not anchor to the surface of the rough endoplasmic reticulum during translation most probably

Using the techniques of genetic engineering, you design a cytoplasmic protein you want to accumulate within the ER of yeast cells. To accomplish this goal, you need to

Distinguish among the following: endocytosis, pinocytosis, and phagocytosis.

In plants, peroxisomes associated with nitrogen fixation in legumes can be found in great abundance in

The chronic use of the class of drugs can result in decreased effectiveness of antibiotics, anticoagulants, and steroids.

Of the following cell types, the greatest concentration of high- density lipoprotein (HDLs)would be associated with cells.

All of the following are unique to plant cells EXCEPT

Lysosomal storage diseases are the result of deficiencies in lysosomal proteins. An example of one such disorder is

If you were looking within a cell for organized clathrin structures, you would find them associated with which of the following structures?

A radioactively labeled protein is made by cells and followed through the various organelles in the secretory pathway. After six hours, all of the radioactivity is still primarily in the Golgi apparatus. This suggests that the

Peroxisomes

is the molecule associated with receptor- mediated endocytosis that "coats" the vesicle until it is released.

Exocytosis is stimulated by regional increases in concentration.

You want to engineer a yeast cell manufacture and secrete a bacterial protein product. To do this properly, you need to make certain that

The proteins of bacteria were radioactively labeled and fed to phagocytic cells. The proteins within the phagocytic cell became increasingly more radioactive over time. This observation is the result of the activity of

Regulatory secretion of hormones would be associated with at the trans- face of the Golgi.

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: The Flow of Energy in the Cell

Enzymes: The Catalysts of Life

Membranes: Their Structure, Function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

Signal Transduction Mechanisms: I Electrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Ii Messengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesion, Cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, Chromosomes, and the Nucleus

The Cell Cycle, Dna Replication, and Mitosis

Sexual Reproduction, Meiosis, and Genetic Recombination

Gene Expression: I the Genetic Code and Transcription

Gene Expression: II Protein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters