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TLS Online TPP Program

#Question id: 1091

Why does testosterone, a lipid-soluble signaling molecule that crosses the membranes of all cells, affect only target cells?

#Unit 4. Cell Communication and Cell Signaling

  1. Only target cells retain the appropriate genes regulated by testosterone.

  2. Intracellular receptors for testosterone are present only in target cells.

  3. Only target cells possess the cytosolic enzymes that transduce the signal from testosterone to adenylyl cyclase.

  4. Only in target cells is testosterone able to initiate the phosphorylation cascade leading to activated transcription factor.

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TLS Online TPP Program

#Question id: 32432

#Unit 2. Cellular Organization

Which of the following condition leads to muscle relaxation?
TLS Online TPP Program

#Question id: 32433

#Unit 2. Cellular Organization

Rho kinase dependent phosphorylation leads to activation of:
a. MLC Phosphatase
b. MLC kinase
c. MLC
d. Rho-GTP
TLS Online TPP Program

#Question id: 32434

#Unit 2. Cellular Organization

Myosin V is regulated by binding cargo. which of the following condition supposed in the inactive folded state? 
TLS Online TPP Program

#Question id: 32435

#Unit 2. Cellular Organization

Activation of Rho has following effects, except: 
TLS Online TPP Program

#Question id: 32436

#Unit 2. Cellular Organization

In microtubules, the end with exposed β-subunits is the ___?___, while the end with exposed α-subunits is the __?____.
TLS Online TPP Program

#Question id: 32576

#Unit 2. Cellular Organization

Microtubules are generally nucleated from a specific intracellular location known as a microtubule-organizing center where: