Which of the following is NOT a characteristic of a type II restriction endonuclease?
A) cleavage product can be either blunt or sticky ended but is always the same for an individual enzyme
B) recognizes a specific palindromic site for cleavage
C) recognition site length varies among enzymes but is always the same for an individual enzyme
D) unable to cleave methylated DNA
Answer: D
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Which of the following statements describes the
value of fungi in the environment? a. Fungi “fix” nitrogen from the air for use by plants. b. Fungi trap sunlight energy in the form of carbohydrates. c. Fungi release elements from organic matter. d. Fungi enrich the soil by decreasing the rate of decay of organic matter. e. Fungi remove toxic metals from the soil.
The explanation for the accumulation of deleterious alleles in asexual populations over time, with the resulting genetic load, is known as ________. [two words]
Fill in the blank(s) with correct word
Give two examples of medical compounds derived from aquatic organisms and their medical utility
What will be an ideal response?
Advantages of the interferon-gamma release assay (IGRA) over the traditional TB skin test include all of the following except
A) IGRAs are sensitive enough to detect early cases of TB. B) IGRA can provide results within a day. C) IGRA requires only one patient visit as opposed to two with the skin test. D) IGRA only detects active TB infections. E) IGRA can be used on persons who have been vaccinated against TB.