Nhận biết (M1)

Firefly luciferase (Fluc) is a distinctly evolved enzyme that can oxidize a substrate called D-luciferin to induce bioluminescence and can act as a fatty acyl-CoA synthetase (ACS) enzyme, a class of enzyme present in all insects. __________ Fluc is a bifunctional enzyme whose presence indicates an insect is capable of emitting light; in contrast, the presence of ACS alone would be insufficient for determining bioluminescence.

Which choice completes the text with the most logical transition?

• A.

  Nevertheless,

• B.

  In fact,

• C.

  Moreover,

• D.

  That is,