Which of the following statements regarding DNA is false?
A) DNA contains the sugar deoxyribose.
B) DNA contains the nitrogenous base uracil.
C) One DNA molecule can include four different nucleotides in its structure.
D) DNA molecules have a sugar-phosphate backbone.
Answer: B
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Rhizobium and Bradyrhizobium are significant contributors to which process when engaged in a symbiotic relationship with leguminous plants?
A. Sulfate reduction B. Denitrification C. Nitrification D. Nitrogen fixation
What did the researchers conclude from the data shown in the figure?
A. The size of larvae is dependent on treatment with the Bt toxin. B. Resistance to the Bt toxin is dominant. C. Resistance to the Bt toxin is recessive. D. The number of larvae is dependent on treatment with the Bt toxin. E. Resistance to the Bt toxin is not genetic.
Microorganisms in the Soil Environment
What will be an ideal response?
The molecule that binds to the active site of an enzyme is called the allosteric inhibitor.
a. true b. false