Which of the following statements regarding the Watson?Crick model of DNA is not accurate?
A) It is the most common biological form.
B) It is a left-handed helix.
C) It is antiparallel.
D) The bases are "stacked" in the center of the molecule.
E) The backbone consists of alternating sugars and phosphates
B) It is a left-handed helix.
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Which of the following is the process of moving photosynthates in the phloem from productive areas like the leaves to storage in the roots?
a. transpiration b. evocation c. translocation d. teleportation
Which of the following is incorrect regarding Yersinia pestis?
A. It produces coagulase as a virulence factor. B. It has a capsule as a virulence factor. C. It produces an enterotoxin. D. It exhibits bipolar staining and appears to resemble a safety pin. E. It is a gram-negative rod.
The Southern Hemisphere lacks which of the following biomes?
a. tundra b. taiga c. savanna d. tundra and taiga e. tundra and savanna
In prokaryotes, the form of RNA polymerase that can accurately initiate synthesis of RNA is called
A. the core polymerase. B. the holoenzyme. C. the sigma subunit. D. RNA polymerase II. E. RNA polymerase III.