Which of the following are methods for isolating a protein of interest?
A.) electrophoresis and crystallography
B.) chromatography and mass spectrometry
C.) electrophoresis and nuclear magnetic resonance
D.) nuclear magnetic resonance and crystallography
E.) chromatography and electrophoresis
Ans: E.) chromatography and electrophoresis
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A plant that has the mutant form of the WEREWOLF gene (wer) would be identifiable by
A. the excessive number of vascular bundles in stem. B. the lack of fibers in the outer portions of the stem. C. the abundance of microscopic hairs on the root. D. the extra thick layer of mesophyll cells in the leaf. E. the lack of microscopic hairs along the epidermis of the root.
A urine specimen obtained from a patient went to the microbiology lab for a bacterial culture and antibiotic sensitivity testing. The specimen sat out on the processing counter for a couple of hours before being cultured. Twenty fours hours later, the lab report goes into the computer---over 100,000 bacterial cells per milliliter of urine. Which statement is an accurate assessment of these results?
A. Urine samples have to be taken from the kidney in order to get a true bacterial count. B. Not all bacteria will grow on bacteriological media, so the total count is grossly underestimated. C. Urine is a sterile fluid as it leaves the body, so it is likely that the specimen was mishandled by the nursing staff when the sample was obtained. D. The bacterial count is not accurate since the culture sat without refrigeration.
Taxonomy is the ________
A) study of cells B) naming and classifying of species C) study of organisms and their interaction with the environment D) study of genes
What is a wiki?
A) It is a keyword associated with a piece of information. B) It is an online discussion site where people can hold conversations. C) It is a type of a Web site that is usually maintained by an individual. D) It is a website that is open to collaborative editing by multiple individuals.