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TLS Online TPP Program

#Question id: 1099

How does the toxin of Vibrio cholerae cause profuse diarrhea?

#4. Cell Communication and Cell Signaling

  1. It modifies a G protein involved in regulating salt and water secretion.

  2. It modifies adenylyl cyclase and triggers excess formation of cAMP.

  3. It signals IP3 to act as a second messenger for the release of calcium.

  4. It modifies a ligand-gated ion channel.

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TLS Online TPP Program

#Question id: 3864

#3. Fundamental Processes

RNA polymerase:
TLS Online TPP Program

#Question id: 3865

#3. Fundamental Processes

Which of the following statements about E. coli RNA polymerase is false?
TLS Online TPP Program

#Question id: 3869

#3. Fundamental Processes

Which one of the following statements about E. coli RNA polymerase (core enzyme) is false?
TLS Online TPP Program

#Question id: 3873

#3. Fundamental Processes

The excision (splicing) of many group I introns requires, in addition to the primary transcript RNA:
TLS Online TPP Program

#Question id: 3875

#3. Fundamental Processes

Splicing of introns in nuclear mRNA primary transcripts requires:
TLS Online TPP Program

#Question id: 3876

#3. Fundamental Processes

Which one of the following is not true of the mRNA for ovalbumin?