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1. Explain under what circumstances the following statement would not be true: "a chemical disinfectant by definition should always be bactericidal." Why would this statement not be true under the circumstances you described?
2. Discuss the factors that will influence the size of the zone of inhibition of an antibiotic when employing the Kirby-Bauer method.
Acetoacetate may be reduced to 3-hydroxybutyrate. What serves as a better reducing agent, NADH or FADH2? Explain.
if dividing cell is labelled with 32P, in which DNA molecules will the radioactivity be incorporated during metaphase? After replication, in which DNA molecules will the radioactivity be present?
A female rabbit with hemophilia, rickets and a tail was mated to a male rabbit that did not have hemophilia or rickets but lacked a tail.
The digastric and omohyoid muscles are similar in that they both have________. Suprahyoid, Two bellies, 60
Determine which of the following structures are present in both prokaryotic and eukaryotic cells? Plasma membrane, Golgi apparatus, DNA, Lysosomes, Perioxisomes, Cytoplasm.
Although the primary transcript of a gene may be identical in two different cell types, the translated mRNAs can be quite different.
Distinguish between the terms configuration, margin, and elevation. Describe the best way to view each of these characterisitcs?
You have the amino acid sequence of a protein and wish to search for the gene encoding for this protein in a DNA library. Using this protein sequence, you deduce a particular DNA sequence that can encode for this protein.
In Drosophila, the eye-color mutation scarlet (st) and the bristle mutation spineless (ss) are located in chromosome 3 at a distance of 14 map units. What phenotypes, and in what proportions, would you expect in the progeny from the mating of st+ ..
What factors contribute to the differences in appearance of (a) isolated versus crowded colonies and (b) surface versus subsurface colonies?
Describe why topoisomerases are required in eucaryotic cells even though eucaryotic DNA molecules are linear, not circular like procaryotic DNA molecules.
What types of data prompted Kimura to develop the neutral theory to explain the amount of genetic variation in populations in the late 1960s? How does the neutral theory differ from classical models developed in the 1920s and 1930s?
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