MCQ Bank
In RNA splicing mature mRNA contains __________.
- A) 3 codons
- B) Introns and Exons
- C) Exons
- D) Introns
Find the wrong statement in the following:
- A) Introns are very often much longer than the exons they separate
- B) Once transcribed into an RNA transcript, the introns must be removed
- C) Primary transcripts of intron-containing genes must have their introns removed before they can be translated into proteins.
- D) The primary transcript only contains exons
The internal guide sequence of group I introns base pairs with ______________.
- A) No specific site
- B) 5’ and 3’ site
- C) 3’ splice site sequence
- D) 5’ splice site sequence
During RNA splicing pre-mRNA is converted into mature mRNA containing __________.
- A) Introns
- B) Introns and Exons
- C) 3 codons
- D) Exons
The coding sequence of a gene is a series of codons that specifies the ____________ of amino acids in the polypeptide product.
- A) RNA sequence
- B) Structure
- C) Linear sequence
- D) DNA
An intron is removed through two successive ____________ reactions in which phosphodiester linkages within the pre-mRNA are broken and new ones are formed
- A) Transesterification
- B) Phosphorylation
- C) Amination
- D) Deamination
It is the addition of an initiation factor called σ that converts core enzyme (α2 ββ’) into the form that initiates only at promoters. This form of the enzyme is called........
- A) DNA topoisomerase holoenzyme
- B) DNA polymerase holoenzyme
- C) RNA polymerase holoenzyme
- D) RNA topoisomerase holoenzyme