Prokaryotes were split into two domains based on differences in ____
a. staining characteristics
b. metabolic capabilities
c. rRNA sequences
d. cell membrane properties
e. cell wall composition
ANSWER: c
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How are polypeptide chains in antigens bound together?
a. Polypeptide chains form hydrogen bonds. b. Serine amino acids form molecular bonds. c. Cysteine amino acids form molecular bonds. d. Polypeptide chains do not bind in antigens.
You are generally not aware of the texture of the cloth of your shirt as it rests on your shoulders, unless someone or something happens to make you think of it. What part of the brain is responsible for filtering out such stimuli?
A) reticular activating center B) cerebellum C) primary motor area D) postcentral gyrus
All of the following are characteristic of Pseudomonas aeruginosa EXCEPT
A) gram-positive cell wall. B) resistance to many types of disinfectants and antibiotics. C) growth in moist environments. D) production of pyocyanin. E) rod-shaped.
B cells mature in the ________, and T cells mature in the ________
a. bone marrow / bone marrow b. bone marrow / thymus c. spleen / thymus d. bone marrow / thyroid