Which of the following is not true about the structure of DNA?
A. The bases form the "rungs" of the ladder structure.
B. A always pairs with T and G always pairs with C.
C. The sides of the ladder structure are made up of sugar and phosphate.
D. The two strands are considered parallel.
E. The ladder structure is twisted into a double helix.
Answer: D
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Cytoskeletal elements are found in the
A) Eubacteria. B) Archaea. C) Eukarya. D) choices B and C only E) all of the above
Select the correct sequence of animal
developmental events.
a. fertilization >>> cleavage >>> organ formation >>> growth of tissues b. fertilization >>> cleavage >>> gastrula >>> organ formation c. fertilization >>> gastrula >>> cleavage >>> organ formation d. fertilization >>> organ formation >>> gastrula >>> cleavage e. fertilization >>> organ formation >>> cleavage >>> gastrula
Which of the following produce enzymes such as superoxide dismutase
A. Facultative anaerobes B. Obligate anaerobes C. Obligate aerobes D. There is more than one correct answer
In some attine ants, various species of actinobacteria
a. are used as a food source. b. produce vitamins in the ant gut. c. are used to produce antifungals that protect the ant’s fungal gardens. d. are highly pathogenic, resulting in the destruction of entire ant colonies.