A new virus is discovered that has double stranded DNA and no envelope. The highly purified virions form large crystals. This new virus is most likely a member of which virus family?
A. Adenoviridae
B. Herpesviridae
C. Papillomarviridae
D. Poxviridae
E. Papillomaviridae
Answer: A
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Determine which outcome is LEAST likely for a microorganism being motile
A) avoidance of predation by bacteriovores B) maintaining osmotic balance within a salt gradient C) movement towards growth substrates D) transfer of plasmids to progeny
What could be a possible consequence if a structural gene's TATA box is mutated?
A. The transcriptional start site may not function properly. B. Transcription may start at a variety of sites. C. Unusable transcripts may be produced. D. The preinitiation complex may form at the wrong site. E. All of the choices are correct.
The antibiotics streptomycin and erythromycin function by inhibiting the function of ____ in
prokaryotes but not eukaryotes.
a. RNA polymerases b. aminoacyl-tRNA synthetases c. spliceosomes d. DNA polymerases e. ribosomes
What is the first step in seed germination?
a. emergence of the embryonic root b. diffusion of water into the seed c. hydrolysis of starch d. meristem cells divide rapidly e. cotyledons emerge from the seed