TLS Online TPP Program

#Question id: 1308


What are the cytoskeletal proteins associated with hemidesmosomes?

#Unit 4. Cell Communication and Cell Signaling
  1. Hemidesmosomes are macromolecular complexes that are linked to intermediate filaments composed of keratin.

  2. Hemidesmosomes are macromolecular complexes that are linked to microtubules composed of tubulin.

  3. Hemidesmosomes are macromolecular complexes that are linked to microfilaments composed of actin.

  4. Hemidesmosomes are macromolecular complexes that are linked to both microtubules and microfilament.

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TLS Online TPP Program

#Question id: 2154

#Unit 2. Cellular Organization

Membrane lipids are distributed appropriately between the two leaflets of a given membrane by

a. dockases.    

b. trumpases.              

c. fatty acid desaturases.        

d. flippases.    

e. transmembrane tunnelases.

TLS Online TPP Program

#Question id: 2155

#Unit 2. Cellular Organization

Cholesterol is

a. unrelated to any plant lipids.                     

b. not found in chloroplast membranes.

c. encoded by an intron-containing gene on chromosome 23.

d. relatively abundant in the plasma membrane and endocytic membranes.

e. synthesized in the ER.

TLS Online TPP Program

#Question id: 2156

#Unit 2. Cellular Organization

Proteins known to be involved in Golgi apparatus independent transport of lipids include

a. StAR protein.                                 

b. Neimann-Pick C1 (NPC1) protein.

c. HMG CoA reductase.                    

d. acyl:cholesterol acyl transferase (ACAT).

e. cholesterol 7α-hydroxylase.  

TLS Online TPP Program

#Question id: 2157

#Unit 2. Cellular Organization

Which of the following is not a metabolic derivative of cholesterol?

a. dolichol                  

b. vitamin D               

c. bile acids    

d. v-SNARE molecules                     

e. NSF

TLS Online TPP Program

#Question id: 2158

#Unit 2. Cellular Organization

Which of the following factors increase(s) the rate of simple (passive) diffusion of a solute across a phospholipid bilayer?

TLS Online TPP Program

#Question id: 2159

#Unit 2. Cellular Organization

A channel protein