The transition from the closed to the open complex involves structural changes in the enzyme and the opening of the DNA double helix to reveal the template and nontemplate strands. This “melting” involves

A. Isomerization reaction and it does not require energy derived from ATP hydrolysis

B. Isomerization is essentially irreversible and, once complete, typically guarantees that transcription will subsequently initiate

C. Positions –11 and -2, with respect to the transcription start site.

TLS Online TPP Program

#Question id: 12836

#Unit 2. Cellular Organization

The final layer of control that is critical in the regulation of CDKs is a family of proteins known as CDK inhibitors, or CKIs, which bind directly to the cyclin-CDK complex and inhibit its activity. Which of the following function not done by CKIs?

TLS Online TPP Program

#Question id: 12837

#Unit 2. Cellular Organization

Haploid yeast cells were grown in culture and stained with propidium iodide, a fluorescent dye that is incorporated into DNA. The x axis shows DNA content, the y axis the number of cells. The DNA content analysis shows different populations of cells.

Which of the following statement is correct regarding to above graph?

TLS Online TPP Program

#Question id: 28581

#Unit 2. Cellular Organization

Which one of the following is Labile factors that involve to drive the progression of cells through different stages of the cell cycle?

TLS Online TPP Program

#Question id: 28582

#Unit 2. Cellular Organization

Cells commit to a new cell division at a specific point in___

TLS Online TPP Program

#Question id: 28583

#Unit 2. Cellular Organization

Some given R factor which are responsible for beginning of the cell cycle in mammalian cells? 

TLS Online TPP Program

#Question id: 28584

#Unit 2. Cellular Organization

Some given R factor which are responsible for beginning of the cell cycle in yeast cells?