Question

question 44 of 50
how are bacteria different from viruses?
a. bacteria have nuclei.
b. bacteria can exist outside a host.
c. bacteria do not contain dna.
d. bacteria are not alive.

Explanation:

Bacteria are single - celled organisms. They are prokaryotes (no true nucleus), contain DNA, and are alive. They can reproduce and carry out metabolic processes independently and can exist outside a host. Viruses, on the other hand, are non - living (obligate intracellular parasites) and cannot reproduce or carry out metabolic processes on their own; they need a host cell.

• Option A: Bacteria are prokaryotes and do not have a true nucleus (nuclei).
• Option C: Bacteria do contain DNA (either circular chromosomal DNA and/or plasmids).
• Option D: Bacteria are living organisms as they can carry out life processes like metabolism, growth, and reproduction (by binary fission).

Answer:

B. Bacteria can exist outside a host.