Which of the following is NOT completed before mRNA is exported from the nucleus

Question

Which of the following is NOT completed before mRNA is exported from the nucleus?

Select one:

a. splicing out introns

b. transcription

c. addition of 5' cap and poly A tail

d. translation

Where does synthesis of transcription factor proteins occur?

Select one:

a. nucleus

b. cytoplasm

c. both the nucleus and cytoplasm

d. neither the nucleus or cytoplasm

Which of the following would prevent the production of both RNA and protein of a particular gene?

Select one:

a. mutation of the ribosome binding sit

b. mutation that creates a stop codon

c. mutation of the start codon

d. mutation of the promoter sequences

To what do transcription factors bind?

Select one:

a. promoter region of RNA

b. DNA polymerase

c. start codons

d. promoter region of DNA

Explanation / Answer

Answer d:In translation m RNA is decoded by ribosome outside the nucleus for amino acid synthesis hence answer d is correct. Answer c:Transcription factor are transcribed in nucleus but translated in cytoplasm Answer c: Mutation at start codon means nil protein synthesis Answer d: Transcription factor are the diverse family of protein binds directly to promoter region of DNA which lie upstream of coding region in a gene or directly to RNA polymerase

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