Which of the following is true of unsaturated fats?
A. They are more common in animals than in plants
B. They have double bonds in the carbon chains of their fatty acids.
C. They generally solidify at room temperature.
D. They contain more hydrogen than do saturated fats having the same number of carbon atoms.
Answer: B. They have double bonds in the carbon chains of their fatty acids.
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The filamentous phages all contain
A. single-stranded DNA. B. double-stranded DNA. C. single-stranded RNA. D. double-stranded RNA.
Preventing the incorporation of microbes into food can by achieved by
A. washing fruits and vegetables. B. aseptic techniques for handling meat, eggs, and milk. C. avoiding cross-contamination of utensils and cutting boards. D. handwashing and proper hygiene in the kitchen. E. All of the choices are correct.
The enzyme nitrogenase is most directly involved in the process called
a. nitrification. b. ammonification. c. nitrogen cycling. d. nitrogen fixation. e. nitrogen assimilation.
Speculate on the origin of the restriction enzyme called EcoRI
What will be an ideal response?