Most known plant viruses have ________-strand RNA genomes, because small genomes ________.
A) negative / facilitate cell-to-cell transfer
B) positive / facilitate cell-to-cell transfer
C) negative / interact more readily with host DNA
D) positive / interact more readily with host DNA
Which feature, if changed, would NOT abolish M13's utility as a cloning vector?
A) ssDNA genome becoming a dsDNA genome
B) loss of genes that make coat proteins
C) replacing the segment of non-coding DNA in its genome with an indispensible gene
D) switch from lysogenic to lytic lifestyle
Integration of Mu DNA into the host genome is essential for
A) lytic growth.
B) lysogenic growth.
C) both lytic and lysogenic growth.
D) neither lytic nor lysogenic growth.
A concatemer is a
A) combination of two or more repeated nucleotide sequences covalently linked together.
B) complex of RNA-specific polymerases found only in bacteriophages.
C) linker molecule that allows several phages to infect one host.
D) polymeric protein.
Mu is a ________ virus with a ________ tail.
A) ssRNA / filamentous
B) dsRNA / helical
C) ssDNA / filamentous
D) dsDNA / helical
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