Through the process photosynthesis, plants and algae transform light energy into chemical energy. Where in the plant does
photosynthesis take place?

Photosynthesis takes place inside the chloroplasts.

Explination:

Green plants use photosynthesis to create energy from carbon dioxide and sunlight. This energy, in the form of glucose, is used by the plant to grow. Photosynthesis occurs within these structures, which contain the substance chlorophyll.

the denominator has a very specific role.

the answer to your question is:

c. complementary base-pairing