Which one of the following statements about Chlamydia and Chlamydophila spp. is false?
A) They are obligate intracellular pathogens.
B) They are considered to be “energy parasites.”
C) The diseases they cause are all arthropodborne.
D) They are considered to be Gram-negative bacteria.
Answer: C
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Kinases are enzymes that can phosphorylate (transfer phosphate groups onto) macromolecules such as proteins. A particular kinase, Kinase 1 is known to promote cell division. It promotes cell division by phosphorylating Protein X. Phosphorylation of Protein X activates Protein X. Once activated, Protein X stimulates the production of other proteins such as Protein Y and Z that directly promote
cell division. In order to function, Kinase 1 requires the presence of Metal A. However, in the presence of Protein A, Kinase 1 is nonfunctional. From the description, what is considered the substrate of Kinase 1? A. Protein X B. Protein Y C. Protein Z D. Metal A E. Protein A
Which of these characteristics would most likely discourage self-pollination in a flower with both stamens and pistils?
A. many more stamens than pistils B. long pistils and short stamens C. long stamens and short pistils D. wind pollination E. determinant plants
Henrietta Lack died of
a. cervical cancer. b. breast cancer. c. polio. d. malaria. e. old age
Which of the following are NOT protists?
a. bacteria b. diatoms c. slime molds d. dinoflagellates e. euglenoids