II. Directions: Identify what kind of text type is the following paragraph. Encircle the letter of the correct answer. 1. Researchers have used cryogenic electron microscopy to show that coronaviruses enter human cells through an interaction with angiotensinconverting enzyme 2 (ACE2) Scientists exploring how coronaviruses like COVID-19 infect human cells have shown that the SARS CoV-2 spike (S) glycoprotein binds to the cell membrane protein angiotensin-converting enzyme 2 (ACE2) to enter human cells.

COVID-19 has been shown to bind to ACE2 via the S protein on its surface During infection, the S protein is cleaved into subunits, S1 and S2. S1 contains the receptor binding domain (RBC which allows coronaviruses to directly bind to the peptidase domain (PD) of ACE2 S2 then ikely plays a role in membrane fusion. What is the purpose of the text?

a.explain how Covid-19 enters human cell

b.classify the different corona virus.

c.entertain the readers about the effect of covid-19​