BIO 340 Exam 4 questions and verified answers; get it 100% accurate

BIO 340 EXAM 4 QUESTIONS AND VERIFIED
ANSWERS/ GET IT 100% ACCURATE


A region of chromatin has recently become DNAse I hypersensitive.
Which enzyme has been activated to cause this change in chromatin
structure?



a). Histone methyltransferase

b). Histone acetylase

c). Histone deacetylase

d). Phosphatase - correct answer- b). Histone acetylase



Attenuation in the E. coli trp operon results from the formation of trp
mRNA secondary structures.



a). True

b). False - correct answer- a). True



Hallmarks of many cancer cells include which of the following?



a). Failure to undergo apoptosis

b). Genomic instability

c). The inability to control cell division

, d). Reduced ability to repair DNA damage

e). All of the above - correct answer- e). All of the above



In animals, the Drosha enzyme cuts pri-miRNA to produce miRNA.



a). True

b). False - correct answer- a). True



In negative control of the lac operon, what molecule would you expect
to find bound to the operator if there is no transcription?



a). Activator

b). Repressor

c). RNA polymerase

d). Inducer

e). Corepressor - correct answer- b). Repressor



In selecting recombinant bacteria, cells are chosen that are resistant to a
specific antibiotic. How are the bacteria made resistant?



a). They are pre-selected for the experiment on this basis.

b). The antibiotic resistance gene is encoded in the vector/plasmid.