Lesson 906 of 1524
Acellular Pathogens
Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length.
Practice this chapterViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid .
There may also be a phospholipid membrane surrounding the capsid Viruses are obligate intracellular parasites
Be able to describe the general characteristics of viruses as pathogens; describe viral genomes; describe the general characteristics of viral life cycles.
Worked example
What does this chapter state?
- 1Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length.
- 2That claim is the chapter’s own statement.
- 3Answer from the claim, not from where the chapter sits in the book.
Result: Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length.
Why. The sentence is taken from this chapter’s summary or key concepts.
Answer with the meaning this chapter gives. A nearby idea from the same book is a different term.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.