Question

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. in fact, b. moreover, c. that is, d. nevertheless, 24. the work of contemporary asian american poet john yau often incorporates references to other poems and works of visual art. typically, these allusive gestures are subtle, recognized by only the most attentive of yaus readers. in his 2013 poem “further adventures in monochrome,” ______ yau explicitly identifies a particular artwork—yves kleins 1960 painting silence is golden—as the poems inspiration.

Explanation:

For the first text about Fluc enzyme, "That is," is appropriate as it is clarifying and re - stating the nature of Fluc as a bifunctional enzyme. For the second text about John Yau's poem, "however" would be a good transition as it contrasts the usual subtle allusions with an explicit identification in this case. But among the given options for the second one, "in contrast" would work to show the difference from the typical subtle allusions.

Answer:

1. C. That is,
2. (No option given in the question for the second part's best - fitting transition among the given types, but if we assume similar options as the first part, we need to contrast the usual subtlety with explicitness, and a more appropriate option among the common ones would be something like "however" or "in contrast". Since we have no such options here, we can't fully answer the second part from the given choices in the same format as the first part.)