Question

1. Which of the following is CORRECT concerning transcription of E. coli genes? A. Transcription termination...

1. Which of the following is CORRECT concerning transcription of E. coli genes?

A. Transcription termination may involve rho factor

B. Sigma factor is required for elongation of a RNA chain

C. Melting or unwinding of a DNA template is achieved by a helicase

D. Both DNA strands in a gene are transcribed from one promoter

2. Math the items: 1. mRNA, 2. rRNA, 3. tRNA, 4. exon, 5. intron

A. Synthesized by RNA Polymerase lll in eukaryotes:

B. Is NOT modified in prokaryotes:

C. Forms a loop structure(lariat) during splicing:

D. Has non-DNA encoded " poly A" added to the 3' end:

3. Which of the following transcription processes is possible only in prokaryotes?

A. Regulation of the amount of transcription from a gene

B. Regulation of where transcription begins

C. Co-transcriptional translation

D. Transcription generating a new RNA that grows in the 5' --->3' direction

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Homework Answers

Answer #1

Answer:-1) rho factor is required for the termination of the transcription process.

Sigma factor isrequired for the initiation of the transcription process . Unwinding and melting of the the DNA is done by the DNA dependent RNA polymerase. Only one strand of DNA is transcribed in the process of transcription.

Answer:-2) tRNA synthesized by RNA polymerase 3 in in eukaryotes.

Introns forms a loop structure during splicing.

m RNA is not modified in prokaryotes.

Answer :- 3) Co transcription translation is possible only in prokaryotes.As the Transcription occurs in the DNA and DNA is present in the nucleus whereas translation occurs in the cytoplasm . There is no division between cytoplasm and nucleus in the prokaryotes therefore transcription and translation occurs simultaneously in the prokaryotes such as bacteria .

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