When two adjacent thymine molecules are joined by a covalent bond as a result of exposure to UV light, this structure is referred to as a

Thymine couplet
Thymine dimer
Thymine duplex
Thymine doublet


Thymine dimer

Biology & Microbiology

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Mycolic acids are exclusively present in Mycobacterium spp. and can be distinguished by a(n) ________ staining procedure (which is, therefore, a diagnostic utility to identify mycobacteria)

A) acid-fast B) DAPI C) Gram D) lipo

Biology & Microbiology

Which of the following E. coli polymerases functions in the replication of the chromosome?

A. DNA Pol I B. DNA Pol II C. DNA Pol III D. DNA Pol IV E. both DNA Pol II and Pol IV

Biology & Microbiology

The ____ is responsible for maintaining the membrane potential across the cell membrane

a. H+ pump b. Na+/K+ pump c. diffusion gradient d. Ca2+ pump e. osmotic ratio

Biology & Microbiology

Evolution has been tested in various ways. Genetic, fossil, anatomical, physiological and behavioral studies all confirm that evolution is the mechanism of the origin of species. Thus, in science evolution is considered a scientific

____.

a. fact b. hypothesis c. law d. theory e. guess

Biology & Microbiology