Genes abc and def have a high average cotransduction frequency. Genes abc and xyz have a very low average cotransduction frequency. What is the best explanation for this difference?
A. The genes abc and def are much closer to each other on the chromosome.
B. The genes abc and def must share a higher degree of sequence similarity.
C. Both genes have a high affinity for the viral binding sites.
D. Both genes code for gene products that are necessary for viral replication.
A. The genes abc and def are much closer to each other on the chromosome.
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What soil composition would be best for availability of nutrients, water, and root development?
A) equal amounts of sand, clay, and humus B) higher proportion of humus, lower amounts of clay and sand C) higher proportion of clay, lower amounts of humus and sand D) higher proportion of sand, lower amount of humus and clay
The most abundant organic molecule in nature is:
A. water. B. cellulose. C. aquaporin. D. cholesterol. E. ATP.
What is the energy generated in the first
electron transfer chain in the light-dependent reactions of photosynthesis used to do?
a. split water into oxygen, hydrogen ions, and electrons b. generate NADPH c. power the ATP synthase enzyme to produce ATP d. pump hydrogen ions into the thylakoid compartment e. generate glucose
During HIV reproduction, spike glycoproteins
A. are embedded in the infected cell membrane. B. do not enter the cell with the virus. C. are released into the cytoplasm by cellular enzymes. D. are assembled into the virus along with reverse transcriptase. E. are embedded in the viral capsid.