Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6034
TLS Online TPP Program

#Question id: 7234

Studies from the sea urchin developmental biology, Eric Davidson’s group envisions a network involving cis regulatory elements (such as promoters and enhancers) in a logic circuit connected to one another by transcription factors. Following statements are given regarding to this network.

A. The network receives its first inputs from transcription factors in the egg cytoplasm.

B. The network self-assembles from the ability of the maternal transcription factors to recognize cis-regulatory elements of particular genes that encode other transcription factors.

C. The new set of transcription factors activate autocrine signaling pathways that activate specific transcription factors in neighboring cells.

D. This network of interconnections among genes that specify cell types known as a gene regulatory network (GRN).

Which of the following statements are correct?

#Unit 5. Developmental Biology
  1. A, B and C
  2. B and D
  3. A, B and D
  4. A and D
More Questions
TLS Online TPP Program

#Question id: 23181

#Unit 13. Methods in Biology

__________ type of biosensors exist to measure the concentration and location of Ca2+ and the activation state of GTPase switch proteins.
TLS Online TPP Program

#Question id: 28654

#Unit 2. Cellular Organization

 APC/C^cdh1  leads to ubiquitinylation of geminin and degraded by proteasomes, at which phase of the cell cycle?
TLS Online TPP Program

#Question id: 4107

#Unit 3. Fundamental Processes

Imagine that you have created a fusion between the Trp operon, which encodes the enzymes for tryptophan biosynthesis, and the Lac operon, which encodes the enzymes necessary for lactose utilization. Under which set of conditions (A–F below) will β-galactosidase be expressed in the strain that carries the fused operon?

A. Only when lactose and glucose are both absent.

B. Only when lactose and glucose are both present.

C. Only when lactose is absent and glucose is present.

D. Only when lactose is present and glucose is absent.

E. Only when tryptophan is absent.

F. Only when tryptophan is present.
TLS Online TPP Program

#Question id: 19096

#Unit 4. Cell Communication and Cell Signaling

Coronatine is a toxin effector to mimic which of the plant hormone?
TLS Online TPP Program

#Question id: 1782

#Unit 4. Cell Communication and Cell Signaling

Function of DAF (CD55)