This is the 16373rd most frequent Russian word.
ретровирусы
Retroviruses are viruses that use reverse transcription to integrate their RNA genome into the host's DNA.
Here, 'ретровирусы' refers to a category of viruses with specific biological properties.
Ретровирусы являются одной из форм вирусов, которые могут интегрироваться в геном клетки.
Retroviruses are a form of viruses that can integrate into the cell's genome.
In this sentence, 'ретровирусов' is in the genitive case, indicating possession or association with the action of studying.
Изучение ретровирусов помогло учёным понять механизмы передачи генетической информации.
Studying retroviruses has helped scientists understand mechanisms of genetic information transfer.
Here, 'ретровирусы' is used in the plural nominative form, emphasizing their role in a scientific application.