Which of the following portion of some xenobiotic can be traced back to a biological origin to see if these substances were produced oil, natural gas or coal?

#Question id: 31183

#Unit 4. Cell Communication and Cell Signaling

#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: 15670

#Unit 8. Inheritance Biology

#Question id: 31375

#Unit 2. Cellular Organization

#Question id: 28340

#Unit 5. Developmental Biology

Which of the following gene is specify the characteristic structures of each segment?