Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 1074
TLS Online TPP Program

#Question id: 1099

How does the toxin of Vibrio cholerae cause profuse diarrhea?

#Unit 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.

More Questions
TLS Online TPP Program

#Question id: 2957

#Unit 2. Cellular Organization

A mutation in the gene that codes for p53 can result in-

A. loss of an inhibitor protein, p21.

B. loss of a transcription factor.

C. uncontrolled cell growth and cancer.

Which of the following is correct?
TLS Online TPP Program

#Question id: 26463

#Unit 3. Fundamental Processes

Conversion of CPC-OPC  is affected by mutation in
TLS Online TPP Program

#Question id: 19280

#Unit 9. Diversity of Life Forms

In which of the following taxa does the mature sporophyte depend completely on the gametophyte for nutrition? 
TLS Online TPP Program

#Question id: 11761

#Unit 9. Diversity of Life Forms

A snail-like, coiled, porous test (shell) of calcium carbonate is characteristic of which group?
TLS Online TPP Program

#Question id: 4469

#Unit 3. Fundamental Processes

Termination is a normal and important function at the ends of genes. There, sequences called terminators trigger the elongating polymerase to dissociate from the DNA and release the RNA chain it has made, In bacteria, terminators come in two types: Rho-dependent and Rho-independent, choose correct statements about this;

Rho-dependent

a- rut sites

b- has an ATPase activity

Rho-independent

c- terminates only those transcripts still being transcribed beyond the end of a gene or operon

d- intrinsic terminator