Question 1

Which of the following is associated with extracellular digestion via release of the contents of lysosomes directly to the environment?

Accepted Answer

A) fertilization of animal eggs 
B) rheumatoid arthritis 
C) autophagy 
D) only choices A and B 
E) choices A, B, and C

Question 2

The ________ is the organelle involved in the posttranslational modification of proteins and sorting of proteins to various intracellular and extracellular compartments.

Accepted Answer

The answer of The ________ is the organelle involved in...

Question 3

You are working with cells and observe transport of your target protein within a cell.You suspect that sorting conforms to the SNARE hypothesis.You,therefore,expect

Accepted Answer

A) to eventually identify vesicle-SNAP receptors. 
B) to eventually identify transport-SNAP receptors. 
C) an association with clatherin-coated pits. 
D) the protein molecules were internalized by phagocytosis. 
E) all of the above

Question 4

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

Question 5

Peroxisomes

Accepted Answer

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

Question 6

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

Question 7

The endoplasmic reticulum is a site for

Accepted Answer

A) potassium storage in muscle cells. 
B) drug detoxification by catalase. 
C) N-linked glycosylation of polypeptides. 
D) addition of lipid residues. 
E) both choices B and C

Question 8

The plant cell organelle analogous to the endosome is the

Accepted Answer

A) provacuole. 
B) lysosome. 
C) peroxisome. 
D) glycoxysome. 
E) none of the above

Question 9

Match between columns
                        Premises: presence of acid hydrolases
test for the TCA cycle enzymes
test for catalase activity
test for the presence of cytochromes
look for fractions that are green
ribulose bisphosphatase activity is present
hydroxylation of compounds including phenobarbital

Accepted Answer

The Answer of peroxisomes and Mitochondria and There is no is...

Question 10

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

Accepted Answer

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

Question 11

Peroxisomes and the smooth endoplasmic reticulum are both organelles associated with the detoxification of harmful substances.How do these two organelles differ with regard to this process?

Accepted Answer

The answer of Peroxisomes and the smooth endoplasmic reticulum are...

Question 12

________ are proteins associated with clathrin-coated vesicles that are involved in the binding of vesicles to specific receptors.

Accepted Answer

The answer of ________ are proteins associated with clathrin-coated vesicles...

Question 13

You have genetically engineered a yeast cell to make a protein that will ultimately be secreted from the cell. If all is functioning well,in which order (from first to last)do you expect to find the protein in the cell until it is secreted?

Accepted Answer

A) rER → Golgi → secretory vesicle → environment 
B) rER → Golgi → sER → nucleus → environment 
C) nucleus → rER → Golgi → secretory vesicle → environment 
D) sER → Golgi → secretory vesicle → environment 
E) rER → secretory vesicle → Golgi → environment

Question 14

Uptake of low-density lipoproteins (LDLs)occurs by

Accepted Answer

A) simple diffusion. 
B) bulk-phase endocytosis. 
C) facilitated transport. 
D) receptor-mediated endocytosis. 
E) pinocytosis.

Question 15

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

Question 16

Which of the following cellular processes has/have been linked to cancer/tumor formation?

Accepted Answer

A) autophagy 
B) EGF desensitization 
C) caveolae uptake 
D) NMDA receptors 
E) both choices A and B

Question 17

________ 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 18

Describe how Botox can be used in the treatment of wrinkles and muscle spasms at low concentrations.

Accepted Answer

The answer of Describe how Botox can be used in...

Question 19

A ________ is the organelle that fuses with endosomes and supplies hydrolytic enzymes necessary for the digestion of the materials within the endosome.

Accepted Answer

The answer of A ________ is the organelle that fuses...

Exam 12: The Endomembrane System and Peroxisomes