Question

mosquitoes can often transmit viruses from one organism to another, acting as ____ of the virus.
a) bacteriophage
b) vectors
c) symbionts
d) parasites
question 19 (5 points)
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in the ____ cycle, a virus integrates its dna into the host’s dna, and its dna is replicated when the host dna is replicated.
a) retroviral
b) lysogenic
c) lytic

Explanation:

First Question (Mosquitoes transmitting viruses)

• A bacteriophage is a virus that infects bacteria, not relevant here.
• A vector is an organism that transmits a pathogen (like a virus) from one host to another, which matches mosquitoes' role.
• Symbionts have a mutualistic or commensal relationship, not transmission.
• Parasites live on/ in a host and harm it, but the focus here is transmission, not the mosquito's feeding relationship.

Second Question (Virus cycle with DNA integration)

• Retroviral refers to a virus type (like HIV) that uses reverse transcription, not the cycle described.
• Lysogenic cycle: Virus integrates its DNA into host DNA, replicates with host, no immediate lysis.
• Lytic cycle: Virus takes over host, replicates, and lyses (destroys) host cell, no integration for long - term replication with host.

Answer:

B) vectors