The cell nuclei is the site for transcription in eukaryotes. The process then advances to the three sequential phases – initiation, elongation and termination. In order for the eukaryotes to bind to the promoter region and then help recruit the appropriate polymerase. However, the polymerase that is responsible for transcribing mRNA is RNA polymerase II.
1. The enzyme required for transcription is
(a) RNAase
(b) DNA polymerase
(c) RNA polymerase
(d) Restriction enzymes
Answer: (c)
2. Transcription is the transfer of genetic information from
(a) DNA to RNA
(b) DNA to mRNA
(c) mRNA to tRNA
(d) tRNA to mRNA
Answer: (b)
3. Sigma factor is a component of
(a) DNA ligase
(b) DNA polymerase
(c) Endonuclease
(d) RNA polymerase
Answer: (d)
4. The main function of tRNA with regards to protein synthesis is
(a) Proofreading
(b) identifies amino acids and transports them to ribosomes
(c) Inhibits protein synthesis
(d) all of the above
Answer: (b)
5. One end of tRNA matches genetic code in three-nucleotide sequences known as
(a) codon
(b) genetic code
(c) blunt ends
(d) anticodon
Answer: (d)
6. The longest primary transcript is generated by
(a) dystrophin gene
(b) Tintin gene
(c) neuromedin u
(d) centromere protein A
Answer: (a)
7. A DNA sequence is read by an RNA polymerase that produces complementary antiparallel RNA strand known as
(a) Hexa transcript
(b) secondary transcript
(c) primary transcript
(d) tertiary transcript
Answer: (c)
8. Which of these subunits of RNA polymerase is totally required to initiate transcription?
(a) alpha (α)
(b) sigma (σ)
(c) omega (ω)
(d) beta (β)
Answer: (b)
9. In both prokaryotic and eukaryotic cells, the synthesis of protein chains is initiated with
(a) Arginine
(b) Methionine
(c) Serina
(d) Valine
Answer: (b)
10. Transcription in eukaryotes is initiated when
(a) RNA strand is present
(b) RNA polymerase is present
(c) Core promoter sequence is present
(d) None of these
Answer: (c)
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