Ligation reactions occur most efficiently between DNA fragments:

A. that have sticky ends.
B. that have blunt ends.
C. that have complementary sticky ends.
D. that are cleaved with different restriction enzymes.
E. where one fragment has a sticky end and the other has a blunt end.


C

Biology & Microbiology

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Transmission of Mycobacterium leprae involves

A) direct contact. B) respiratory transmission. C) both direct contact and the respiratory route. D) penetration into unbroken skin.

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Bacterial strains that are characterized by biochemical differences are called ________.

Fill in the blank(s) with the appropriate word(s).

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Nucleic acids are polymers made up of which of the following monomers?

A) nucleotides B) sugars C) amino acids D) nitrogenous bases

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Which structure acts like a motor for the bacterial flagellum?

a. hook b. capsule c. filament d. basal body

e. protein rings

Biology & Microbiology