Practice Questions

TLS Online TPP Program

#Question id: 2456

If the activity of thymosin β4 was inhibited in fibroblasts, the overall effect would be:

#Unit 2. Cellular Organization

a decrease in cell locomotion because less actin would be recruited to the leading edge.
an increase in cell locomotion because there would be a higher concentration of actin available.
no change in cell locomotion because thymosin β4 doesn’t interact with Rho, Rac, or Cdc42.
decrease in cell locomotion because there would be a higher concentration of actin available.

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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

TLS Online TPP Program

#Question id: 4470

#Unit 3. Fundamental Processes

Most recent experiments suggest that the last of these is at least an important part of the story and that the conformational change causes the elongating complex to stall, with dissociation following more slowly- this conformational change caused by,

TLS Online TPP Program

#Question id: 4471

#Unit 3. Fundamental Processes

Intrinsic terminators,

TLS Online TPP Program

#Question id: 4472

#Unit 3. Fundamental Processes

The hairpin works as an efficient terminator only when,

TLS Online TPP Program

#Question id: 4475

#Unit 3. Fundamental Processes

Choose correct order of various DNA elements relative to the transcription start site;