The following statements about transcription are true:

1. Synthesis proceeds in a unidirectional manner. This is true because during transcription, the DNA strand is read in a 3' to 5' direction by RNA polymerase, and the new RNA strand is synthesized in a 5' to 3' direction.

2. The ability of RNAP (RNA Polymerase) to bind to a promoter site can be either enhanced or precluded by transcription factors. This is also true. Transcription factors are proteins that control the rate of transcription of genetic information from DNA to messenger RNA by binding to specific DNA sequences.

The following statements about transcription are false:

1. Terminates when polymerase stumbles upon a stop signal. This is not entirely accurate. Termination of transcription occurs when a specific termination sequence in the DNA is recognized by the RNA polymerase or other termination factors, not simply when the polymerase "stumbles upon" a stop signal.

2. Termination of transcription is the same for both prokaryotes and eukaryotes. This is false. In prokaryotes, termination can occur via two different mechanisms: Rho-dependent and Rho-independent termination. In eukaryotes, termination involves cleavage of the newly formed transcript followed by polyadenylation.

3. Transcription is initiated by the binding of a messenger RNA molecule to a promoter site, which then unwinds the double helix at that point and begins synthesis. This is false. Transcription is initiated when RNA polymerase binds to a promoter site on the DNA, not a messenger RNA molecule. The RNA polymerase then unwinds the DNA and begins synthesis of the RNA strand.

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The following statements about transcription are true:

1. Synthesis proceeds in a unidirectional manner. This is true because during transcription, the DNA strand is read in a 3' to 5' direction by RNA polymerase, and the new RNA strand is synthesized in a 5' to 3' direction.

2. The ability of RNAP (RNA Polymerase) to bind to a promoter site can be either enhanced or precluded by transcription factors. This is also true. Transcription factors are proteins that control the rate of transcription of genetic information from DNA to messenger RNA by binding to specific DNA sequences.

The following statements about transcription are false:

1. Terminates when polymerase stumbles upon a stop signal. This is not entirely accurate. Termination of transcription occurs when a specific termination sequence in the DNA is recognized by the RNA polymerase or other termination factors, not simply when the polymerase "stumbles upon" a stop signal.

2. Termination of transcription is the same for both prokaryotes and eukaryotes. This is false. In prokaryotes, termination can occur via two different mechanisms: Rho-dependent and Rho-independent termination. In eukaryotes, termination involves cleavage of the newly formed transcript followed by polyadenylation.

3. Transcription is initiated by the binding of a messenger RNA molecule to a promoter site, which then unwinds the double helix at that point and begins synthesis. This is false. Transcription is initiated when RNA polymerase binds to a promoter site on the DNA, not a messenger RNA molecule. The RNA polymerase then unwinds the DNA and begins synthesis of the RNA strand.

Knowee AI · Accepted Answer

The following statements about transcription are true:

1. Synthesis proceeds in a unidirectional manner. This is true because during transcription, the DNA strand is read in a 3' to 5' direction by RNA polymerase, and the new RNA strand is synthesized in a 5' to 3' direction.

2. The ability of RNAP (RNA Polymerase) to bind to a promoter site can be either enhanced or precluded by transcription factors. This is also true. Transcription factors are proteins that control the rate of transcription of genetic information from DNA to messenger RNA by binding to specific DNA sequences.

The following statements about transcription are false:

1. Terminates when polymerase stumbles upon a stop signal. This is not entirely accurate. Termination of transcription occurs when a specific termination sequence in the DNA is recognized by the RNA polymerase or other termination factors, not simply when the polymerase "stumbles upon" a stop signal.

2. Termination of transcription is the same for both prokaryotes and eukaryotes. This is false. In prokaryotes, termination can occur via two different mechanisms: Rho-dependent and Rho-independent termination. In eukaryotes, termination involves cleavage of the newly formed transcript followed by polyadenylation.

3. Transcription is initiated by the binding of a messenger RNA molecule to a promoter site, which then unwinds the double helix at that point and begins synthesis. This is false. Transcription is initiated when RNA polymerase binds to a promoter site on the DNA, not a messenger RNA molecule. The RNA polymerase then unwinds the DNA and begins synthesis of the RNA strand.

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