3.2.1.2 Prokaryotes and Viruses Flashcards
1
Q
What are prokaryotic cells commonly referred to as?
A
Bacteria
2
Q
List three key differences between prokaryotic and eukaryotic cells.
A
- Much smaller
- No membrane-bound organelles
- A single circular chromosome
3
Q
What type of chromosome do prokaryotic cells have?
A
A single circular chromosome
4
Q
What is the composition of prokaryotic DNA?
A
DNA is not associated with proteins
5
Q
What are the essential components found in all prokaryotic cells?
A
- Cytoplasm
- Cell membrane
- Ribosomes (70S)
- Single circular DNA molecule in cytoplasm
- Cell wall made of murein (glycoprotein)
6
Q
What additional structures may be found in many prokaryotic cells?
A
- One or more plasmids
- Capsule surrounding cell
- One or more flagella
7
Q
True or False: Viruses are considered living organisms.
A
False
8
Q
What are the three essential components that all viruses possess?
A
- Genetic material (DNA, RNA, or ssDNA)
- A protein capsid
- Attachment proteins
9
Q
What type of proteins may be part of a virus’s structure?
A
- Attachment proteins
- Enzymes within the matrix (e.g., reverse transcriptase)
10
Q
Fill in the blank: Viruses may have a _______ envelope.
A
lipid
