The "big bang" refers to
a. an event marking the beginning of the
universe.
b. the extinction of the dinosaurs.
c. the inevitable end of the universe.
d. the collision of the first galaxies forming
the universe as it is today.
e. the inevitable death of large stars
A
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Which of the following features are common to transformation, transduction, and conjugation? (1) unidirectional transfer of genes
A) 1, 2, 3 B) 1, 2 C) 3, 4 D) 1, 2, 4
Ras is like a G protein because it:
A. triggers the formation of cyclic AMP. B. responds to the activation of G protein-coupled receptors. C. is only active when it binds GTP. D. All of these answer options are correct.
Eukaryotic gene expression may be controlled at all of the following levels except:
A: transcription initiation. B: chromatin structure. C: All of the above are levels at which genes can be regulated. D: RNA stability. E: RNA processing.
In Figure 8.2, base 2 is attached to
A) ribose. B) phosphate. C) deoxyribose. D) thymine. E) The answer cannot be determined based on the information provided.