Practice Questions

TLS Online TPP Program

#Question id: 4448

Three defined steps in a transcription cycle; choose correct one

1a. Closed complex

In this form, the DNA remains double-stranded, and the enzyme is bound to one face of the helix. I

1b. Open complex

In which the DNA strands separate over a distance of 13 bp around the start site to form the transcription bubble. In the next stage of initiation,

2. Promoter escape

Incorporation of the first 10 or so ribonucleotides is a rather inefficient process, and at that stage, the enzyme often releases short transcripts and then begins synthesis again

3. Initial transcribing complex.

Once an enzyme makes a transcript longer than 10 nucleotides, it is said to have

#Unit 3. Fundamental Processes

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#Question id: 15856

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#Question id: 14692

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#Question id: 1854

#Unit 4. Cell Communication and Cell Signaling

The inactivated polio vaccine is sometimes referred to as the:

#Question id: 2641

#Unit 2. Cellular Organization

Which segments of the attenuator together form the repression loop?

1a. Closed complex	In this form, the DNA remains double-stranded, and the enzyme is bound to one face of the helix. I
1b. Open complex	In which the DNA strands separate over a distance of 13 bp around the start site to form the transcription bubble. In the next stage of initiation,
2. Promoter escape	Incorporation of the first 10 or so ribonucleotides is a rather inefficient process, and at that stage, the enzyme often releases short transcripts and then begins synthesis again
3. Initial transcribing complex.	Once an enzyme makes a transcript longer than 10 nucleotides, it is said to have