Two 6-base sequences are present in bacterial promoters: TATAAT (located 10 nt upstream from the start site) and TTGACA (located 35 nt upstream from the start site). What is the significance of the fact that these two base sequences are different?
A. Binding sites for both the holoenzyme and ATP are provided.
B. Both the location of the start site and the direction of transcription can be established.
C. Binding sites for both the core polymerase and holoenzyme are provided.
D. The transcription bubble can be properly formed.
E. It allows RNA polymerase to distinguish between the template strand and the coding strand of the DNA molecule.
B. Both the location of the start site and the direction of transcription can be established.
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Analysis of the similarities and differences in protein-coding genes and other types of sequences in the genomes of different species is an area of study called ____
Fill in the blank with the appropriate word.
Which of the following statements about kingdom Animalia is FALSE?
a. All adult animals are motile. b. All animals are eukaryotes. c. All adult animals are multicellular. d. Animal cells lack cell walls. e. All animals are heterotrophs.
Which of the following is a nonsteroid hormone?
A) glucagon B) a progestin C) a glucocorticoid D) androgen
All bacterial cells have
A) Fimbriae B) Capsules C) A chromosome D) Flagella E) Endospores