Which is not used as a chemical preservative in food?
A. Salt
B. Organic acids
C. Ethylene oxide gas
D. Antibiotics
E. Sulfite
Answer: D
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You accidentally exposed your cell culture dish to radiation, but you are not sure of the precise wavelength of the exposure
How can you use the induced DNA damage to tell whether the radiation was UV or higher energy? What is the difference between the DNA damage caused by UV radiation compared to higher-energy radiation? Which type of damage is likely to be the most lethal to your cells?
What hypothetical hormone promotes flowering but has never been successfully isolated?
a. florigen b. ubiquitin c. jasmonic acid d. brassinosteroids e. methyl salicylate
Phagocytosis is a process in which a cell
A. takes in foreign particles and destroys them. B. lyses itself. C. adheres to another cell. D. merges with another cell forming antibodies. E. creates molecules and then excretes them.
Compare the following: bacterial species, bacterial strain, and bacterial type. Explain the relationship and development of strains and types to a species.
What will be an ideal response?