How are viruses characterized (what features do we as scientists/biologists use to group them into categories)? What types of infections do they cause (describe, don’t just list)
What are the various types of genomes and how do they “work” (what genome acts as mRNA, what genome requires reverse transcriptase/why, how do RNA genomes get replicated)?
What is the significance of the envelope, how does this relate to infection/release?
What are the “morphologies” of viruses?
What types of cells can be infected with viruses?

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.

answer; ///the above statement is (true);