Question

Which statements are true? Select all that apply.

(A) Three different RNA polymerases in eukaryotes transcribe different classes of genes.
(B) Since prokaryotes lack a nucleus, translation can begin before the transcript is fully transcribed.
(C) Intrinsic termination in prokaryotes occurs when the rho termination factor interacts with the growing RNA transcript.
(D) Eukaryotic RNA polymerase II requires general transcription factors for initiation of transcription.

Answer 1

The statements that are true are: A) Three different RNA polymerases in eukaryotes transcribe different classes of genes. B) Since prokaryotes lack a nucleus, translation can begin before the transcript is fully transcribed. D) Eukaryotic RNA polymerase II requires general transcription factors for initiation of transcription.

Step-by-step explanation:

The statements that are true are:

• A) Three different RNA polymerases in eukaryotes transcribe different classes of genes.
• B) Since prokaryotes lack a nucleus, translation can begin before the transcript is fully transcribed.
• D) Eukaryotic RNA polymerase II requires general transcription factors for initiation of transcription.

RNA polymerase II in eukaryotes transcribes all protein-coding genes, while RNA polymerase I transcribes rRNA genes and RNA polymerase III transcribes different small RNAs. In prokaryotes, translation can begin before transcription is fully complete because prokaryotes lack a nucleus. Eukaryotic RNA polymerase II requires general transcription factors for the initiation of transcription in order to bind to the promoter region and recruit RNA polymerase.

Answer 2

Answer: A. B. D.

Step-by-step explanation:

(A) Three different RNA polymerases in eukaryotes transcribe different classes of genes. TRUE (The eukaryotes are more evolved organisms than prokaryotes and their genome is larger, therefore their processes are more complex)

(B) Since prokaryotes lack a nucleus, translation can begin before the transcript is fully transcribed.TRUE (because there are not barriers that separate both processes, plus they occur in the same direction 5 'to 3'.

(C) Intrinsic termination in prokaryotes occurs when the rho termination factor interacts with the growing RNA transcript. FALSE ( in bacteria, there are two termination types: rho-dependent and rho-independent)

(D) Eukaryotic RNA polymerase II requires general transcription factors for initiation of transcription. TRUE (The general transcription factors bind with the RNA polymerase II to form a complex that surrounds the starting point, and determine the site of initiation)