TLS Online TPP Program

#Question id: 2893


Which of the following statement regarding the Nucleosome-remodeling complexes is CORRECT?

#Unit 2. Cellular Organization
  1. SWI/SNF found in all eukaryotic cells that together remodel chromatin so that nucleosomes become more regularly spaced, and inhibit the binding of transcription factors.

  2. Some members of a third family, SWR1, are involved in deposition of the H2A.Z histone variant transcriptionally active chromatin.

  3. SWI (switching) was discovered as a protein required for repression of certain genes involved in mating-type switching in yeast.

  4. The complex of GCN5 (general control non derepressible) and ADA (alteration/deficiency activation) proteins was discovered during investigation of the regulation of nitrogen metabolism genes in eukaryotes.

More Questions
TLS Online TPP Program

#Question id: 32385

#Unit 2. Cellular Organization

What is the correct sequence of the cycle of structural changes used by myosin II to walk along an actin filament?

TLS Online TPP Program

#Question id: 19071

#Unit 4. Cell Communication and Cell Signaling

Pathogen effect on host, response is suppressive is called___

TLS Online TPP Program

#Question id: 7261

#Unit 5. Developmental Biology

The Turing model provides a framework for limb development. Following statements are regarding to this model:


A. In Turing’s model, morphogen A promotes the production of more morphogen A (autoactivation) as well as production of morphogen I. Morphogen I, however, inhibits the production of morphogen A (lateral inhibition).


B. In Turing’s model, morphogen A inhibits the production of more morphogen A (autoinhibition) as well as production of morphogen I. Morphogen I, however, promotes the production of morphogen A (lateral activation).


C. In Turing’s model, the reaction-diffusion dynamics can tell us how the limb bud acquires its proximal- distal polarity as well as how the number of digits is regulated at the distal tip of the limb.


D. The reaction-diffusion system has been proposed to be sufficient for establishing patterns of precartilage and noncartilage tissues.


E. According to this model, along the proximal-distal axis the AER dividing into two domains 1-the inhibitory domain 2-the active domain.


F. According to this model, along the proximal-distal axis the AER dividing into three domains 1-the inhibitory domain 2-the active domain 3-frozen domain.


Which of the following combinations are incorrect?


TLS Online TPP Program

#Question id: 1538

#Unit 4. Cell Communication and Cell Signaling

Many aspects of the biology of stem cells, including maintenance of pluripotency, self-renewal, and differentiation, are controlled by the phenomenon of RNA interference involving a variety of small molecules of RNA.

Match the following miRNA (Column I) with their target gene (Column II).

Column I

Column II

a. Let-7 miRNA

i. Bcl-2

b. miR-16

ii. PTEN phosphatase

c. miR-125a and miR-125b

iii. Myc

d. miR-21

iv. LIN28

TLS Online TPP Program

#Question id: 32302

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the structure shown