#Question id: 2974
#Unit 2. Cellular Organization
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?
#Question id: 19200
#Unit 12. Applied Biology
#Question id: 1640
#Unit 4. Cell Communication and Cell Signaling
An immune response against grass pollen often involves:
#Question id: 902
#Unit 1. Molecules and their Interaction Relevant to Biology
Which demonstrates that the primary structure of a protein determines its tertiary structure?
#Question id: 3216
#Unit 11. Evolution and Behavior
The frequency of galactosemia is approximately 1 in 40,000 live births. The frequency of the carrier state can be calculated as