21. Transcription begins

A. at the start codon
B. upstream from the start codon
C. downstream from the start codon
D. none of these

22. Transcription results in

A. an amino acid chain
B. messenger RNA
C. complementary DNA
D. Okazaki fragments

23. RNA polymerase holoenzyme initiates transcription which involves

A. recognition of the -10 sequence and -35 sequence
B. recognition of the -10 sequence only
C. recognition of the -35 sequence only
D. none of the above

24. The transcriptional regulatory proteins in eukaryotes which induce transcription usually have

A. at least two distinct domains of protein structure, a DNA binding domain and an activation domain
B. at least two distinct domains of protein structure and a DNA binding domain
C. at least one distinct domains of protein structure, a DNA binding domain and an activation domain
D. none of these

25. In prokaryotes, transcription is

A. terminated by the stop codon
B. terminated by a protein called rho
C. terminated by a poly A sequence
D. terminated by a start codon