Bacterial endospores are not produced by
A. Bacillus.
B. Clostridium.
C. Sporosarcina.
D. Staphylococcus.
E. All of these choices are correct.
Answer: D
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High levels of antibodies in patients with SBE cause inflammation because
A. they make the bacteria clump together and get trapped in skin and eyes. B. the surface antigens change rapidly and become unrecognizable. C. the antibodies are defective. D. the antibodies degrade quickly.
Which of the following statements best describes the benefits of radiation therapy?
A. Radiation therapy can be combined with other therapies, including chemotherapy. B. Radiation therapy can be directed against specific cells and tissues within the body. C. Radiation damages the DNA within cancer cells, either slowing down cell division or stopping it altogether. D. Radiation therapy may shrink tumors, making them easier to remove surgically. E. All of the choices are correct.
Bacterial enzymes that are part of a rarely used catabolic pathway are usually organized into a(n) __________
a. inducible operon b. repressible operon c. inducible zinc finger d. repressible leucine zipper e. constitutive operon
Most photosynthesis in typical C3 angiosperms takes place in the
a. palisade mesophyll b. spongy mesophyll c. epidermis d. pericycle e. vascular bundles