Question

Choose all statements that accurately describe the transcription bubble.

A. It moves along the DNA at a rate of about 50 nt/sec It is stationary, with the DNA strand slowly threaded through it at a rate of about 50 nt/sec
B. The growing RNA strand protrudes from the bubble It contains an RNA-DNA hybrid, about 9 nt long
C. The newly made RNA within the bubble makes a single nucleotide contact with DNA at the 3' end
D. The growing RNA is compacted it within a specialized compartment inside the bubble

Answer 1

The correct options are options A and B

Step-by-step explanation:

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A transcription bubble forms as transcription begins. The nucleotides are separated so that the complementary RNA to that part of DNA begins to form.

The correct options are options A and B:

A. It moves along the DNA at a rate of about 50 nt / sec It is stationary, with the DNA strand slowly threaded through it at a rate of about 50 nt / sec

B. The growing RNA strand protrudes from the bubble It contains an RNA-DNA hybrid, about 9 nt long

Answer 2

Option A and Option B

Step-by-step explanation:

A transcription bubble is defined as a molecular structure which is formed when only a few or very limited section of the DNA strand has unwind-ed.

These transcription bubbles are small in size and in general their size ranges between 12-14 base pairs

An RNA polymerase which is about 9 nt long is responsible for making the DNA sequence ready for producing transcript at the 5' end (a complementary, antiparallel RNA strand )

Rate at which double stranded DNA molecule slide back and forth for transcription ranges with in 40-50 nt/sec

Hence, both option A and B are correct