TLS Online TPP Program

#Question id: 2241


Which of the following statement(s) is (are) true of V-class proton pumps?

#Unit 2. Cellular Organization
  1. They are ATPases.
  2. They are present in membranes of plant vacuoles.
  3. They serve to decrease the pH inside a lysosome.
  4. They can acidify the lumen of an organelle (or the extracellular space) because these pumps are electrogenic
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TLS Online TPP Program

#Question id: 1403

#Unit 4. Cell Communication and Cell Signaling

Tumor-suppressor genes encode proteins with which of the following functions?

a. growth-promoting               b. growth-arresting                  c. pro-apoptotic

d. anti-apoptotic                      e. DNA repair

TLS Online TPP Program

#Question id: 1404

#Unit 4. Cell Communication and Cell Signaling

Which of the following are transcription factors?

TLS Online TPP Program

#Question id: 1405

#Unit 4. Cell Communication and Cell Signaling

A gain-of-function mutation in which of the following would have the same effect as a gain-of-function mutation in Ras?

TLS Online TPP Program

#Question id: 1406

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a consequence of p53 stabilization?

a. stabilization of Cdc25A      b. activation of ATM                c. blocked apoptosis

d. transcription of p21                        e. DNA repair

TLS Online TPP Program

#Question id: 1407

#Unit 4. Cell Communication and Cell Signaling

Which of the following is pro-apoptotic?

a. Bax              b. Bcl-2                       c. p53              d. protein kinase B      e. PTEN

TLS Online TPP Program

#Question id: 1408

#Unit 4. Cell Communication and Cell Signaling

Human papilloma virus encodes proteins that inhibit the function of

a. Bcl-2.           b. Myc.                        c. p53.             d. PDGF receptor.      e. Rb.