The complete loss of either a guanine or adenine from DNA is an example of _____
A. Depurination
B. Tautomeric shifts
C. Deamination
D. Demethylation
A
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What type of inheritance pattern is exhibited by the trait being analyzed in this pedigree?
a. autosomal dominant b. autosomal recessive c. X-linked recessive
The chemistry of living systems representing all chemical reactions is called
A. metabolism. B. catabolism. C. anabolism. D. thermodynamics. E. enzymology.
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. Both the location of the start site and the direction of transcription can be established. B. It allows RNA polymerase to distinguish between the template strand and the coding strand of the DNA molecule. C. Binding sites for both the core polymerase and holoenzyme are provided. D. Binding sites for both the holoenzyme and ATP are provided. E. The transcription bubble can be properly formed.
A majority of prokaryotes are capable of carrying out nitrogen fixation.
Answer the following statement true (T) or false (F)