The study of the crown gall tumor found
A. a bacterial plasmid promoter that was similar to plant promoters.
B. an R plasmid.
C. incorporation of the bacterial chromosome into the plant.
D. incorporation of the plant chromosome into the bacteria.
A
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Lack of ____ leads to rickets
a. vitamin A b. vitamin B c. vitamin C d. vitamin D e. vitamin E
Topoisomerase and SSB proteins are important components of the replication process in prokaryotes, but they are not found in eukaryotes
Indicate whether the statement is true or false
Placental mammals give birth to more fully developed offspring than marsupial mammals and therefore have a greater chance of survival. This helps to explain why placental mammals from North America displaced many native South American marsupial mammals when a land bridge formed between the two continents.
a. true b. false
Answer the following questions true (T) or false (F)
1. Flow cytometry makes use of fluorescence to count microbes. 2. All eukaryotes are diploid. 3. A chemical is reported to inhibit bacterial replication. Bacterial cells are placed in medium with all nutrients necessary for replication. The chemical is added to the culture, and after a half hour an extract of the DNA is prepared. A significant percentage of the DNA is in pieces about 1000 to 2000 bases in length. The results are consistent with the chemical blocking the function of DNA ligase.