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#Question id: 2974

Following statements are regarding to control of the G1–S phase transition in budding yeast.

A. G1 cyclin-CDK complexes stimulate the formation of G1/S phase cyclin-CDKs, which then initiate bud formation, centrosome duplication, and DNA replication. In yeast, the G1 cyclin gene is called CLN3.

B. Once sufficient Cln3 is synthesized from its mRNA, Cln3-CDK complexes phosphorylate and activate the transcriptional repressor Whi5.

C. Phosphorylation of Whi5 promotes its export out of the nucleus, allowing the transcription factor complex SBF to induce transcription of the G1/S phase cyclin genes CLN1 and CLN2 as well as other genes important for DNA replication.

D. Once produced, Cln1/2-CDKs contribute to further Whi5 phosphorylation. This positive feedback loop ensures the rapid accumulation of G1/S phase cyclin-CDKs.

Which of the following statements are correct?

#Unit 2. Cellular Organization

  1. A and B

  2. A, B and C

  3. A, C and D

  4.  B and D

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#Question id: 12840

#General Aptitude

If D, E and F are the mid–points of the sides of an equilateral triangle ABC, then the ratio of the area of triangle DEF and DCF is :
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#Question id: 18946

#Unit 13. Methods in Biology

which of the following are Electrophoresis in free solution
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#Question id: 7042

#Unit 5. Developmental Biology

Potentiating the effect on phenotypic variation, when normal zebrafish of the same age, zebrafish embryos exposed to ____X____ the larvae develops with severe developmental anomalies, including reduction in the size of head, gill, and thoracic cartilages associated with cranial neural crest migration. What is X?
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#Question id: 15367

#Unit 4. Cell Communication and Cell Signaling

Genes whose protein products stimulate apoptosis behave as tumor suppressors, An example is the PTEN gene, The phosphatase encoded by this gene dephosphorylates phosphatidylinositol 3,4,5-trisphosphate, a secondary messenger that functions in activation of AKT, cells lacking PTEN phosphatase shows; EXCEPT
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#Question id: 610

#Unit 1. Molecules and their Interaction Relevant to Biology

Protein A has four identical subunits, each of which binds one molecule of ligand Y. The binding of one molecule of Y to one of the subunits induces a conformational change in neighboring subunits that enhances the binding of additional units of Y. This is an example of________.